US Pat. No. 9,282,144

UNMANNED VEHICLE SELECTIVE DATA TRANSFER SYSTEM AND METHOD THEREOF

BAE SYSTEMS PLC, London ...

1. A data transfer system for an unmanned vehicle on a mission, the data transfer system comprising:
a first sensor on the unmanned vehicle and for collecting a first data set;
a second sensor on the unmanned vehicle and for collecting a second data set, wherein the second data set is associated with
the first data set by a predetermined association;

a transceiver for transmitting data from the unmanned vehicle to a remote data storage system; and
a mass data storage computer located on the unmanned vehicle for storing the first and second data sets based on the predetermined
association;

wherein the mass data storage computer is configured to receive and execute requests from the remote data storage system to
transmit the first data set from the unmanned vehicle to the remote data storage system;

wherein the mass data storage computer is configured to receive and execute requests from said remote data storage system
to transmit only selected ones of the second data set from the unmanned vehicle to the remote data storage system; and

wherein the mass data storage computer is configured to be removably connectable to the unmanned vehicle such that at and
end of the mission the mass data storage computer can be removed from the unmanned vehicle and connected to the remote data
storage device through a data cradle to download any data which has not already been transmitted;

whereby a time to prepare the unmanned vehicle for a next mission is reduced.

US Pat. No. 9,294,487

METHOD AND APPARATUS FOR PROVIDING NETWORK SECURITY

BAE SYSTEMS PLC, London ...

1. A method for providing network security, comprising the steps of:
receiving a plurality of packets of a communication, each packet having a header and payload;
extracting the payload from each of the plurality of packets of the communication and combining the extracted payload from
each of the plurality of packets into an aggregate content, the plurality of packets having an associated source and destination;

identifying, with a content processing component, a type of content of the aggregate content to determine whether to scan
the aggregate content;

generating, in response to the determination whether to scan the aggregate content, a threat profile for the aggregate content,
with the content processing component, by inspecting at least a sub-set of the aggregate content, the threat profile depending
upon at least one of an application for which the at least a sub-set of the aggregate content is intended, a program by which
the at least a sub-set of the aggregate content is used, the type of content and a protocol type employed by the at least
a sub-set of the aggregate content, wherein the content processing component comprises a plurality of types of content engine,
each being configured to perform one or more different content processing functions;

calculating at least one digest of at least a portion of the aggregated content, wherein a number of calculated digests is
based on an application for which the at least a portion of the aggregate content is intended;

determining whether the at least a sub-set of the aggregate content has been previously scanned based on a comparison of the
calculated at least one digest with digests stored in a storage device, wherein scan results are indexed by digests;

scanning, in response to the determination whether to scan the aggregate content when the at least a sub-set of the aggregate
content has not been previously scanned, the at least a sub-set of the aggregate content with one or more scanners of a heterogeneous
array of scanners, the one or more scanners being selected in dependence on the threat profile;

controlling, in response to the determination whether to scan the aggregate content, access to at least a part of the plurality
of packets according to the results of scanning the at least a sub-set of the aggregate content by the selected one or more
scanners;

retrieving a scan result corresponding to the calculated at least one digest when the calculated digest is determined to match
a stored digest; and

controlling access to at least a part of the plurality of packets according to the retrieved scan result.

US Pat. No. 9,381,998

TACTILE CUEING APPARATUS

BAE SYSTEMS plc, London ...

1. A tactile cueing apparatus to augment an aircraft control system, the aircraft control system comprising a controlled element
and an operator's inceptor for moving the controlled element via a mechanical linkage connected to the inceptor and linked
to the controlled element, wherein the tactile cueing apparatus comprises:
a force sensor for sensing a control input to the inceptor by the operator to move the mechanical linkage, the force sensor
providing an output;

a controllable actuator arranged to be configured to move the mechanical linkage;
a position sensor for sensing a position of the mechanical linkage, the position sensor providing an output; and
control means programmed to cause the actuator, based upon a predetermined force-position relationship that defines a required
effect upon the position of the mechanical linkage for a given combination of a force as sensed by the force sensor and a
generated resisting force, to:

(i) move the mechanical linkage to a position determined by the output of the force sensor and the force-position relationship,
wherein the actuator moves the mechanical linkage when the output of the position sensor does not conform to a given position
indicated by the force-position relationship at a given input force applied to the inceptor; and

(ii) apply to the inceptor the generated resisting force determined by the output of the position sensor and the force-position
relationship wherein the generated resisting force is equal and opposite to the force applied to the inceptor by the operator
when the mechanical linkage has moved to a position determined by the force sensor output according to the force-position
relationship.

US Pat. No. 9,081,178

PROJECTION DISPLAY FOR DISPLAYING AN IMAGE TO A VIEWER

BAE SYSTEMS plc, London ...

1. A projection display, for displaying an image to a viewer, comprising:
a first plate waveguide made of light transmissive material;
an image-providing light source device arranged to inject image bearing light into the first plate waveguide;
a transmission grating within the first plate waveguide;
an input device within the first plate waveguide arranged to direct the image bearing light onto the transmission grating
of the first plate waveguide;

the transmission grating being arranged to direct said image bearing light internally along the first plate waveguide and
to output the image bearing light from the first plate waveguide; and

a second plate waveguide made of light transmissive and transparent material, said second plate waveguide includes a coupling
grating arranged to receive the image bearing light from the first plate waveguide, said second plate waveguide further includes
an exit grating arranged to diffract received image bearing light out of the second plate waveguide,

wherein image bearing light is diffractively inputted into the first or second plate waveguide and diffractively outputted
from the first or second plate waveguide and the diffractive input and diffractive output powers are substantially matched,
and

dispersion associated with the diffractive input is oppositely matched with dispersion associated with the diffractive output
thereby causing the net chromatic dispersion to a roach or substantially equal zero.

US Pat. No. 9,257,231

HIGH ENERGY CAPACITORS

BAE SYSTEMS PLC, London ...

1. A capacitor comprising:
a first electrode having at least two protrusions;
a second electrode having at least two protrusions, which interlocate with the protrusions on said first electrode; and
at least one curable dielectric material deposed between said interlocated protrusions of the said first and second electrodes,
wherein there is at least one void in the first or second electrode, to allow the curable dielectric material to be flowed
therethrough.

US Pat. No. 9,342,483

SENSOR DATA PROCESSING

BAE SYSTEMS PLC, London ...

1. An automated method of processing sensor data, the method comprising:
(i) using a sensor to measure values of a parameter over a region of interest to produce an image of the region of interest,
the image having a plurality of pixels, a sensor electronic transmitter device connected to said sensor and receiving said
values of a parameter from said sensor, said sensor electronic transmitter device sending digital values of said parameter
for each said pixel of each said image to a memory of one or more processors, said memory storing said digital values of said
pixels of said image for processing in real time, said one or more processors performing the steps of:

(ii) for each pixel, determining an orientation of a gradient of the parameter, at that pixel, using the measured parameter
values;

(iii) for each of a plurality of predetermined ranges of gradient orientation values, determining a number of said pixels
that have a gradient orientation value within that range;

(iv) determining a number of groups of predetermined ranges, wherein each group of predetermined ranges is determined such
that it satisfies a criteria that:

for each predetermined range in that group, a number of said pixels that have a gradient orientation value within that range
is above a threshold value;

if that group contains more than one predetermined range, each predetermined range in that group is contiguous with at least
one other predetermined range in that group; and

for each group, the one or more predetermined ranges in that group are not contiguous with any of the predetermined ranges
in a different group; and

(v) using the determined the number of groups, discriminating between the presence of a man-made object and clutter in the
image; wherein
an object in the region of interest is labeled as man-made if the number of groups is greater than or equal to a further threshold,
and is otherwise labeled as clutter.

US Pat. No. 9,097,386

PORTABLE WORK SCREEN WITH AT LEAST TWO SUPPORTS COMPRISING MAGNETS AND A SEMI RIGID SCREEN

BAE SYSTEMS plc, London ...

1. A portable work screen apparatus comprising:
a semi-rigid screen; and
at least two supports, each of said at least two supports comprising:
a base portion including an attachment device that defines an attachment plane for mounting to a surface, said attachment
device having a magnet for releasably connecting the semi-rigid screen to the surface;

an arm mounted to said semi-rigid screen and extending from said base portion in substantially perpendicular alignment to
the attachment plane of said attachment device, said semi-rigid screen extending at least to the attachment plane;

a handle constructed and arranged to effect positioning and releasable connection of a corresponding support to the surface
such that said semi-rigid screen extends between said at least two supports in one of a plurality of different therebetween
flexed configurations.

US Pat. No. 9,191,125

ACOUSTIC TRANSMISSION

BAE SYSTEMS PLC, London ...

1. An apparatus for the transmission of an acoustic signal through a solid rigid substrate comprising:
a first acoustic transducer for converting electrical signals into acoustic signals, the first acoustic transducer being mounted
on a first face of a solid rigid substrate to transmit the acoustic signals into the substrate;

a second acoustic transducer mounted on a second face of the substrate so as to receive acoustic signals emitted by the first
acoustic transducer and to convert the acoustic signals into electrical signals;

and characterised in that at least one of the acoustic transducers is mounted on its respective face of the substrate via
an intermediate element, the at least one of the acoustic transducers being bonded by a first bonding layer to the intermediate
element, and the intermediate element being attached to the substrate, wherein the intermediate element has mounting pads
on a bottom surface, separated from each other, the mounting pads configured to contact the substrate, the mounting pads defining
a space between the remainder of the bottom surface of the intermediate element and the substrate.

US Pat. No. 9,383,740

CONTROL OF SAFETY CRITICAL OPERATIONS

BAE SYSTEMS PLC, London ...

1. A control apparatus for triggering a safety-critical operation, the control apparatus comprising:
a receiver for receiving control command signals from a remote operator; and
a safety management system having a first part and at least one second part, said first part being responsive to a received
control command signal to trigger operation of said at least one second part and thereby to trigger the safety-critical operation,
wherein said first part transmits a plurality of keywords to said at least one second part in response to a received control
command signal, and

wherein said at least one second part comprises
a plurality of key-safe switches, selectively responsive to the plurality of predetermined keywords, where each of said plurality
of key-safe switches being configured to be activated upon receipt of a different respective one or more of the plurality
of keywords, wherein the safety-critical operation is triggered in the event that at least a majority of said key-safe switches
are activated.

US Pat. No. 9,561,869

IMAGE CAPTURING

BAE SYSTEMS PLC, London ...

1. An aircraft comprising:
a modular camera array configured to, for each of a plurality of time-steps within a time period, for each of a plurality
of modular cameras of the modular camera array, simultaneously generate an image of a respective portion of terrain, wherein
the portions of terrain are such that the whole of a given area of terrain has been imaged by the end of the time period;

one or more processors in each of the modular cameras arranged to identify one or more objects of interest in the images generated
by the respective modular camera of the modular camera array; and

select subset images of all the generated images such that the whole area of terrain is covered by the portions of the terrain
in the images in the subset images;

the subset images being the minimum number of images that provides that the whole area of the terrain is covered by the portions
of the terrain in the subset images alone;

whereby the whole area of the terrain is oversampled, having intermediate images generated between the subset images;
wherein all the generated images equals the subset images plus the intermediate images; and
for an image not in the subset images, if an object of interest is in that image, extract a sub-image containing the object
of interest, that has not previously been stored, from that image;

a camera assembly comprising:
a fixture configured to be rotated relative to the aircraft about an axis;
a mirror mounted on the fixture such that, if the fixture rotates, the mirror rotates, and rotatable relative to the fixture
about a further axis, the further axis being substantially perpendicular to the axis; and

an assembly camera mounted on the fixture such that the assembly camera has a substantially fixed position relative to the
fixture, and arranged to detect electromagnetic radiation reflected by the mirror; wherein

the camera assembly is configured to, responsive to a selection of a particular object of interest from the one or more identified
objects of interest, be operated so as to rotate the fixture about the axis and/or rotate the mirror about the further axis
such that a portion of terrain that the assembly camera is able to image includes the selected object of interest.

US Pat. No. 9,203,132

TRANSITION INTERFACE HAVING FIRST AND SECOND COUPLING ELEMENTS COMPRISED OF CONDUCTIVE TRACKS ORIENTED AT DIFFERENT ANGLES WITH RESPECT TO EACH OTHER

BAE Systems plc, London ...

10. A radio frequency (RF) transmission arrangement;comprising:
a multilayer RF circuit board;
a structure including a transmission waveguide for coupling an RF transmission signal from the multilayer RF circuit board
to an antenna; and

a transmission transition interface including:
a first buried conducting track of a multilayer circuit board, where the first buried conducting track provides a first coupling,
the first coupling being between a first radio frequency (RF) transmission output and the transmission waveguide;

a second buried conducting track of the multilayer circuit board, where the second buried conducting track provides a second
coupling, the second coupling being between a second RF transmission output and the transmission waveguide;

the first buried conducting track having a first track section and a second track section, where said second track section
extends over an opening of the transmission waveguide to provide a first RF coupling element; and

the second buried conducting track having a third track section and a fourth section, where said fourth track section extends
over the opening of the transmission waveguide to provide a second RF coupling element; wherein:

at least a portion of the second track section extends over the waveguide opening in a first angular direction that is between
30° and 60° to a direction of the first track section;

at least a portion of the fourth track section extends over the waveguide opening in a second angular direction that is between
120° and 150° to a direction of the third track section; and

the first angular direction and the second angular direction are parallel and opposed to each other, the transmission transition
interface being buried in the multilayer RF circuit board.

US Pat. No. 9,327,825

ACTUATOR CONTROL SYSTEM

BAE SYSTEMS plc, London ...

1. A control system for an un-manned vehicle, comprising:
a plurality of control computers each arranged to issue commands over a respective channel to an actuator control system to
effect movement of a control surface of the un-manned vehicle, the actuator control system including at least a first control
channel for receiving first primary command signals from a first of the plurality of control computers and a second control
channel for receiving second primary command signals from a second of the plurality of control computers different to the
first control computer; and

a command monitor associated with each of the at least first and second control channels for comparing the first and second
primary command signals received from the at least first and second control computer, respectively, with commands being issued
by another one of the plurality of control computers, different than the first and second control computers, and to output
the results of said comparison;

the actuator control system comprising:
for each of the at least first and second control channels, a first driver and a second driver, respectively, wherein the
first driver and the second driver are both configured to drive a single actuator linked to the control surface;

a change-over switching mechanism that selects one of the at least first and second control channels to be a selected active
control channel for receipt of commands in respect of the control surface; and

a channel isolation mechanism that receives the output result from the command monitor associated with the selected active
control channel and, in the event that the comparison indicates a potential fault with respect to the selected active control
channel, to disengage the selected active control channel and to engage a different one of the at least first and second control
channels to be the active control channel for receipt of commands in respect of the control surface.

US Pat. No. 9,294,560

SYSTEM AND METHOD OF ANALYSING TRANSFER OF DATA OVER AT LEAST ONE NETWORK

BAE SYSTEMS PLC, London ...

1. A system configured to analyse transfer of data over at least one network, the system comprising:
a secure analysis device, comprising a hardware processor, configured to capture samples of traffic data being transferred
over the at least one network in respect of a subset of users selected from a user base of the at least one network and to
analyse the samples of traffic data to identify data relating to potential unlicensed data transfer by the subset of users,
wherein selection of the subset of users is based upon comparing levels of potentially unlicensed data transfer of users in
the user base against a threshold; and

a processing device, comprising a hardware processor, configured to:
(a) receive results of the analysis by the secure analysis device of data transfers by the subset of users;
(b) determine from the results a measured number of unlicensed data transfers, an estimated number of unlicensed data transfers
and an estimated number of users having performed unlicensed data transfers;

(c) derive at least one metric indicative of unlicensed data transfer by the user base based on the measured and estimated
determinations; and

(d) use data relating to the at least one metric to control network hardware to prevent at least one of: (i) further data
transfer, and (ii) further network access.

US Pat. No. 9,240,053

TARGET TRACKING

BAE Systems plc, London ...

1. A method of tracking a plurality of targets, the method comprising:
for a first time-step, estimating a state of each target;
at a second time-step:
measuring values for a state of a target; and
measuring and updating a value of an identity parameter for the target, wherein the identity parameter at least partially
distinguishes the target from one or more of the other targets;

for the second time-step, estimating a state of each target using the estimated target states for the first time-step;
updating the estimated target states for the second time-step by performing a Joint Probabilistic Data Association process
using the measured values for the states of the targets; and

performing an identity management process to estimate a probability that a particular state measurement corresponds to a particular
target, wherein the Joint Probabilistic Data Association process is implemented using a particle filter; and

wherein the estimated probability is a function of the state of the particular target at the second time-step, and a set of
all state values and identity parameter values measured at time steps up to and including the second time-step.

US Pat. No. 9,239,336

METHOD AND APPARATUS FOR CLEARING A BLOCKAGE IN A PITOT OR STATIC PRESSURE LINE OF A DUCT OF A PRESSURE SENSOR

BAE SYSTEMS PLC, London ...

7. Apparatus for clearing a blockage in a pitot pressure line or static pressure line of a duct of a pressure sensor, the
apparatus comprising:
the duct having a first portion, the pitot and static pressure line and a second portion;
the first portion having an open end and a further end, the open end being open to a fluid, the further end being connected
to the second portion such that the fluid is permitted to flow between the first portion and the second portion during pressure
measurement;

the second portion having a first opening and a second opening, the further end of the first portion being connected to the
first opening, the second opening being connectable to a pressure transducer;

a non-return valve connected to the first opening of the second portion such that the non-return valve is positioned at or
proximate to the further end of the first portion, and arranged such that, upon application of a suction force to the first
portion at the open end, fluid flows into the first portion via the non-return valve from outside the duct, and through the
first portion from the further end to the open end;

means for applying a suction force to the first portion at the open end.

US Pat. No. 9,050,915

VEHICLE SEAT

BAE SYSTEMS plc, (GB)

1. A seat for a vehicle, the seat comprising:
a support;
a platform block moveable between a first position and a second position relative to the support, the platform block configured
to be secured to the support at each of the first and second positions;

a seat element for accommodating an occupant; and
a suspension system connecting the seat element to the platform block, the suspension system including an extendable and retractable
resilient member having an equilibrium configuration which the resilient member is biased to return to while the resilient
member extends beyond or retracts below the equilibrium configuration and while the platform block is secured in either one
of the first and second positions.

US Pat. No. 9,046,372

TRAJECTORY PLANNING

BAE SYSTEMS plc, London ...

1. A method for controlling a land vehicle having a curvature limit according to a trajectory, the method comprising:
identifying a starting position (p0) for the vehicle;

identifying a desired terminal position (P) for the vehicle;
defining a linear approximation of dynamics of the land vehicle with a state vector (x) that indicates land vehicle velocity
with linearized variables that lack non-linear heading information;

using the starting position (p0), the desired terminal position (P), and the linear approximation, determining, by one or more processors, the trajectory
for the land vehicle that optimizes a linear time invariant system having a form x=Ax+Bu against a cost function and with
a first constraint applied to the state vector (x) to determine an acceleration input (u) to be applied by the land vehicle
to accomplish a portion of the trajectory; and

using the starting position (p0), the desired terminal position (P), and the linear approximation, determining, by one or more processors, the trajectory
for the land vehicle that optimizes a linear time invariant system having a form x=Ax+Bu against a cost function, without
the first constraint and with another constraint applied to the state vector (x) to determine an acceleration input (u) to
be applied by the land vehicle to accomplish another portion of the trajectory;

wherein to prevent the trajectory from including curvatures below the curvature limit of the land vehicle, the first constraint
requires that a magnitude of the land vehicle velocity, as indicated by the state vector (x), be greater than or equal to
a threshold value for the velocity; and

controlling the land vehicle to follow the trajectory.

US Pat. No. 9,165,372

IMPROVEMENTS RELATING TO EVENT DETECTION

BAE SYSTEMS PLC, London ...

1. A method of detecting the occurrence of an event in a crowd based on analysis of video footage of the crowd, the video
footage comprising a series of image frames, the method being performed by at least one processor and comprising the steps
of:
(a) receiving the video footage at the at least one processor;
(b) calculating, for each of the series of image frames, a complexity value indicative of overall crowd movement dynamics,
the complexity value being calculated in dependence on said each of the series of image frames, thereby calculating a series
of complexity values;

(c) analysing the series of complexity values to identify any changes occurring among the series of values; and
(d) in response to identifying a change among the series of complexity values having a magnitude in excess of a threshold,
transmitting an output signal to alert an operator that the event has been detected.

US Pat. No. 9,054,777

IMPROVEMENTS RELATING TO SIGNAL PROCESSING

BAE SYSTEMS PLC, London ...

1. A method of sampling a radio frequency signal comprising:
(i) receiving the radio frequency signal;
(ii) modulating an optical signal with the radio frequency signal to generate a modified optical signal;
(iii) modulating the modified optical signal with an oscillator signal to generate a modulated optical signal;
(iv) converting the optical signal to a radio frequency electrical signal;
(v) applying a filter to the radio frequency electrical signal to select an intermediate frequency signal, the filter having
an intermediate pass band and an intermediate roll-off, the intermediate pass band and the intermediate roll-off in combination
defining an intermediate frequency band having a first bandwidth; and

(vi) sampling the intermediate frequency signal at a sampling frequency using a number of analogue-to-digital converters that
alternately sample the intermediate frequency signal;

the oscillator signal and the sampling frequency in combination being arranged such that the intermediate frequency band is
defined between consecutive multiples of half of the sampling frequency.

US Pat. No. 9,379,760

RADIO FREQUENCY COMMUNICATION

BAE SYSTEMS PLC, London ...

1. A bidirectional radio frequency communication unit comprising:
a transmit modem;
a receive modem;
an RF transceiver circuit;
a coupling waveguide arrangement; and
an antenna; wherein:
the antenna is used for both receiving and transmitting;
the RF transceiver circuit is configured to transmit and receive at RF frequencies greater than or equal to 50 GHz;
at least a majority of the RF transceiver circuit is provided on a single multilayer printed circuit board (PCB);
the coupling waveguide arrangement includes respective transmit and receive waveguides provided within a diplexer that has
a common antenna coupling port formed as a block;

the multilayer PCB and the diplexer form a laminated structure; and
transition interfaces between the RF transceiver circuit and the coupling waveguide arrangement include one or more buried
layer probe elements in a buried layer of the multilayer PCB.

US Pat. No. 9,366,856

APPARATUS AND METHODS FOR COMBINING AND SEPARATING MULTIPLE BEAMS

BAE SYSTEMS plc, London ...

1. Apparatus for co-aligning a plurality of input radiation beams each having a respective waveband, which includes:
a plurality of respective lateral deflectors, each of the respective lateral deflectors configured to impart a selected respective
lateral displacement to a corresponding one of the input radiation beams;

an optical collimating element for passing each of said radiation beams with respective imparted lateral displacements; and
an optical deflecting element for receiving the radiation beams passed by said optical collimating element;
wherein said respective lateral displacements are selected having regard to the waveband of each beam to cause the radiation
passed by said optical deflecting element to be co-aligned, and

wherein the optical collimating element is disposed between the optical deflecting element and at least one of the lateral
deflectors.

US Pat. No. 9,319,319

COMMUNICATION NETWORK TRAFFIC CONTROL ELEMENT

BAE SYSTEMS PLC, London ...

1. A communication network traffic control element which is arranged to receive traffic as a plurality of discrete traffic
packets at an input and communicate the traffic as a serial traffic stream to an output, the traffic control element comprising:
a receiver configured to receive discrete network traffic packets;
a plurality of processors operating in parallel and an output associated with each processor, each of the processors being
configured to process the traffic packets to convert the traffic packets to a serial traffic stream and communicate the serial
traffic stream to the associated output; and

a buffer included in each of the processors, said buffer being configured for receiving traffic packets from the receiver
in accordance with a traffic request signal which is communicated from the buffer to the receiver, and for controlling a rate
of traffic packet flow from the receiver to the processor to enable a rate of serial traffic output from the processor to
be varied independently of a rate of traffic packet input to the receiver.

US Pat. No. 9,291,835

FINDING BIAS VOLTAGES FOR OPTICAL MODULATORS

BAE SYSTEMS Plc, London ...

1. A method of finding a bias voltage corresponding to a quadrature point of an optical modulator, the modulator being configurable
to be biased by application of the bias voltage such that the modulator operates at quadrature, the method comprising:
providing a target for output power of the modulator, the target for the output power of the modulator being an output power
corresponding to the modulator operating at quadrature;

applying, to the modulator, a bias voltage having an initial value;
thereafter, finding a value for the bias voltage that biases the modulator such that the output power of the modulator is
within a pre-defined range of the target output power by either:

(i) starting at the initial value, alternately increasing and decreasing the bias voltage with gradually increasing amplitude;
or

(ii) starting at the initial value, alternately decreasing and increasing the bias voltage with gradually increasing amplitude;
and

identifying the found value for the bias voltage as a bias voltage corresponding to a quadrature point of the optical modulator.

US Pat. No. 9,091,547

SIMULATING A TERRAIN VIEW FROM AN AIRBORNE POINT OF VIEW

BAE SYSTEMS PLC, London ...

1. A method performed by a computer of simulating views of a terrain from the airborne object, the method comprising:
obtaining, at the remote location, a first geo-referenced terrain model of the terrain;
obtaining, at the airborne object, a second geo-referenced model of the terrain;
obtaining, at the remote location, position and orientation information relating to an airborne object;
correlating, at the remote location, the position and orientation information with the first geo-referenced terrain model;
generating at the remote location a corresponding simulated view, from the airborne object, of the terrain at the remote location;
correlating, at the airborne object, the position and orientation information with the second geo-referenced terrain model
and generating said corresponding simulated view of the terrain; and

simultaneously displaying the simulated view to a first observer at the remote location and displaying the simulated view
to a second observer aboard the airborne object or aboard an aircraft on which the airborne object is mounted.

US Pat. No. 9,074,895

TRAJECTORY PLANNING

BAE SYSTEMS plc, London ...

1. A method for controlling a land vehicle having a curvature limit according to a trajectory, the method comprising:
identifying a starting position (p0) for the vehicle;

identifying a desired terminal position (P) for the vehicle;
defining a linear approximation of dynamics of the land vehicle with a state vector (x) that indicates land vehicle velocity
with linearized variables that lack non-linear heading information;

determining, based on the starting position (p0), the desired terminal position (P), and the linear approximation, by the one or more processors, an acceleration input (u)
that optimizes a linear time invariant system having a form x=Ax+Bu against a cost function and with constraints applied to
accomplish the trajectory for the land vehicle;

wherein the constraints include:
a first constraint that magnitude of the acceleration input is less than or equal to a maximum acceleration for each time-step
of the trajectory;

a second constraint that maximum acceleration of the vehicle is less than or equal to a non zero approximated non-linear function
of velocity squared divided by a minimum turn radius of the land vehicle;

a third constraint that values for maximum acceleration input are based on an x-value or a y-value of velocity as expressed
by state vector (x); and

a fourth constraint that the maximum acceleration is positive; and
controlling the land vehicle to follow the trajectory.

US Pat. No. 9,288,142

ROUTER AND SYSTEM FOR INTERCONNECTING NETWORKS HAVING DIFFERING LEVELS OF SECURITY CLASSIFICATION

BAE SYSTEMS PLC, London ...

1. A communications network router comprising:
a first communications port configured to receive a first communications channel of a first domain;
a second communications port configured to receive a second communications channel of a second domain;
a switch apparatus configured to selectively connect said first port to said second port to establish a communications link
between said first and second domains, wherein said first domain has a different level of classification relative to said
second domain; and

a manual switch operable to control selective connection of said first port to said second port, manual operation of said
manual switch by an operator being required for each instance of said selective connection of said first port to said second
port.

US Pat. No. 9,194,832

STRUCTURAL HEALTH MONITORING USING SPRAYABLE PAINT FORMULATIONS

BAE SYSTEMS PLC, London ...

1. A method of monitoring structural health of a structure, the method comprising:
applying a sonification treatment to a paint formulation containing a dispersion of carbon nanoparticles to assist dispersion
of said carbon nanoparticles;

spraying said paint formulation containing said dispersion of carbon nanoparticles to provide a paint layer on said structure
to form part of a durable paint system; and

monitoring an electrical characteristic of said paint layer to thereby determine an indication of the structural health of
said structure in a region of said paint layer.

US Pat. No. 9,307,325

TRANSDUCER ARRANGEMENT

BAE SYSTEMS plc, London ...

1. A transducer apparatus for acoustic communications through a substrate at a predetermined centre frequency, the apparatus
comprising:
a piezoelectric element for generating an acoustic signal;
a carrier plate, having a first surface for accommodating the piezoelectric element, and having a first array of protrusions
on a second surface opposite the first surface; and

a second array of protrusions at a surface of the substrate,
wherein the piezoelectric element is mounted onto the carrier plate, and the carrier plate is secured in position relative
to the substrate such that the first array of protrusions opposes and is separated from the second array of protrusions by
an inter-arrays medium that is different than the substrate such that the acoustic signal may propagate from the piezoelectric
element, through the carrier plate, through the first array of protrusions, through the inter-arrays medium, and through the
second array of protrusions.

US Pat. No. 9,294,923

DETECTION OF POTENTIALLY FRAUDULENT ACTIVITY BY USERS OF MOBILE COMMUNICATIONS NETWORKS

BAE SYSTEMS plc, London ...

1. A mobile communications fraud detection system, comprising one or more probe devices arranged to intercept data of a plurality
of predetermined types being carried over interfaces between equipment in a mobile communications network providing an air
interface with subscriber mobile communications devices and equipment interfacing with core switching equipment of the mobile
network, said plurality of probe devices being arranged to extract dual-tone multi-frequency signalling tones being communicated
from or to a user of the mobile network and a processor arranged to receive predetermined types of data intercepted by said
plurality of probe devices and to determine the presence of at least one predetermined type of fraudulent activity by users
of the mobile network substantially at the time it occurs.

US Pat. No. 9,278,483

ADDITIVE LAYER FABRICATION METHOD

BAE SYSTEMS PLC, London ...

1. A method of fabricating an object, comprising:
applying heat by at least one laser beam to powdered material so as to fuse the material into a layer on a substantially flat
substrate; and

repeating the applying of heat by said at least one laser beam to said powdered material to build up a stack of layers one
on top of the other, wherein an application of heat by said at least one laser beam is sufficient to create a local pool of
molten material and wherein a layer or layers nearest to the substrate are formed to be thicker than those further from the
substrate, whereby to reduce distortion in the substrate.

US Pat. No. 9,279,793

ANTENNA INSTALLATIONS

BAE SYSTEMS PLC, London ...

1. A sensor arrangement for an antenna installation which includes an antenna array located in an enclosure which is supplied
with conditioned atmosphere supplied directly or indirectly from a dry air source, the sensor arrangement including a dew
point sensor disposed in a flow path away from said enclosure, adapted to detect the dew point of atmosphere passing along
said flow path, and an air flow sensor adapted to monitor flow along said flow path and to generate an alarm if said air flow
falls below a predetermined threshold.

US Pat. No. 9,260,783

ELECTROLESS METAL DEPOSITION FOR MICRON SCALE STRUCTURES

BAE SYSTEMS PLC, London ...

1. A method of depositing metal on at least part of an inner wall surface of a hollow fiber defining a passage in a structure
that includes a plurality of such fibers and passages extending in a same general direction, comprising:
introducing into and retaining in said plurality of passages substantially simultaneously an electroless plating solution
including a mixture of a metal source or compound and a reducing agent at a first temperature, wherein said plating solution
is relatively inactive at said first temperature and relatively active above a second, elevated, temperature;

allowing said solution to substantially cease flowing within said passages;
thereafter heating said structure to at least said second, elevated, temperature while the plating solution is retained in
the passage for a period sufficient to cause a metal layer to form on said wall surface; and

after the heating of said structure, expelling a spent mixture of the metal source or compound and the reducing agent from
the passages by gas pressure.

US Pat. No. 9,129,748

ELECTROSTATIC CAPACITOR DEVICE

BAE SYSTEMS PLC, London ...

1. An electrostatic capacitor device, comprising:
first and second spaced apart electrode structures separated by a dielectric structure;
wherein the first and second electrode structures are each formed from a composite material which includes electrically conductive
fibres in a binder matrix, and

wherein said composite material is electrically conductive and has a structural, load-bearing function that remains stiff
while entirely supporting a weight of the electrostatic capacitor device.

US Pat. No. 9,121,941

METHOD OF DETECTING A CLUTTER RETURN AT A SENSOR

BAE SYSTEMS PLC, London ...

1. A method for detecting a clutter return at a sensor, the method comprising:
a) receiving a signal comprising a return from a first range cell and a return from a second range cell;
b) filtering the return from the first range cell according to frequency to determine: a component of the return from the
first range cell that is in a first frequency band and a component of the return from the first range cell that is in a second
frequency band,

c) filtering the return from the second range cell according to frequency to determine a component of the return from the
second range cell that is in the second frequency band,

d) calculating from
I the magnitude of the component of the return from the first range cell that is in the second frequency band; and
II the magnitude of the component of the return from the second range cell that is in the second frequency band, an estimated
clutter residue in the component of the return from the first range cell that is in the first frequency band, such that the
estimated clutter residue in the component of the return from the first range cell that is in the first frequency band may
be discarded.

US Pat. No. 9,125,294

SHIELD

BAE SYSTEMS PLC, London ...

1. A printed circuit board shield assembly comprising a shield, a printed circuit board and an electronic component mounted
on the printed circuit board, the shield comprising:
a sealing surface connected to a sealing region of the printed circuit board; and
a shielding surface, substantially parallel to and offset from the sealing surface,
the shielding surface thereby defining a cover for receiving the electronic component and at least part of the printed circuit
board, the shielding surface comprising an array of perforations formed therethrough for connection to a high pressure plenum
for ingress of cooling fluid, the array of perforations being configured to correspond to the location of the electronic component
mounted on the printed circuit board, the shield and printed circuit board being configured to define together an outlet for
cooling fluid with respect to the plenum and provide a flow path for cooling fluid from the perforations to the outlet;

wherein the offset between the shielding surface and the sealing surface is selected in dependence on a height of the electronic
component such that the perforations provide impingement cooling of the electronic component.

US Pat. No. 9,074,896

TRAJECTORY PLANNING

BAE SYSTEMS plc, (GB)

1. A method for controlling a land vehicle having a curvature limit according to a trajectory, the method comprising:
identifying a starting position (p0) for the vehicle;

identifying a desired terminal position (P) for the vehicle;defining a linear approximation of dynamics of the vehicle with a state vector (x) that indicates land vehicle velocity with
linearized variables that lack non-linear heading information;
determining, based on the starting position (p0), the desired terminal position (P), and the linear approximation, by the one or more processors, the trajectory for the
land vehicle that optimizes a linear time invariant system having a form x=Ax+Bu against a cost function and with a first
constraint, and without a second constraint, applied to the state vector (x) to determine an acceleration input (u) to be
applied by the land vehicle to accomplish a portion of the trajectory;

determining, based on the starting position (p0), the desired terminal position (P), and the linear approximation, by the one or more processors, the trajectory for the
land vehicle that optimizes a linear time invariant, system having a form x=Ax+Bu against a cost function without the first
constraint and with the second constraint applied to the state vector (x) to determine an acceleration input (u) to be applied
by the land vehicle to accomplish another portion of the trajectory; and

controlling the land vehicle to follow the trajectory;
wherein the second constraint provides that:
the vehicle may not travel in a region;
a centre point of the region is at a distance from a predetermined point on the vehicle substantially equal to a minimum turn
radius of the vehicle, in a direction substantially perpendicular to a velocity of the vehicle; and

a distance from the centre point of the region to a point on a perimeter of the region is greater than or substantially equal
to the minimum turn radius of the vehicle;

wherein the first constraint includes at least one of:
a constraint on magnitude of acceleration of the vehicle;
a constraint on magnitude of velocity of the vehicle; and
a constraint that acceleration is larger when acting in a direction that is substantially perpendicular to velocity of the
land vehicle than when acting in a direction that is substantially parallel to velocity of the land vehicle.

US Pat. No. 9,468,056

IN AND RELATING TO DISPLAYS AND LIGHT SOURCES FOR DISPLAYS

BAE SYSTEMS plc, London ...

1. A light source for a colour display apparatus for displaying light at optical wavelengths corresponding a plurality of
different colours sequentially, the light source comprising:
a plurality of light-emitting diodes (LED) each respectively operable to emit light to display a respective one of said plurality
of different colours;

a power input part for connecting the plurality of LEDs to a power supply for supplying power thereto, the power input part
including a plurality of current sensing units, each current sensing unit being selectable in respect of one of the plurality
of LEDs to apply a corresponding limit to the level of current that may be supplied thereto by the power supply;

a plurality of capacitor units connected to the power input part to be provided with charge from a said power supply for generating
a respective one of a plurality of different respective forward bias voltages for application to said LEDs to operate the
LEDs; and

a control unit operable to connect selectively a said capacitor unit to a said LED for applying a desired one of said different
said forward bias voltages thereto according to the colour of light which the LED is operable to display and to select a corresponding
one of said plurality of current sensing units for the LED.

US Pat. No. 9,418,299

SURVEILLANCE PROCESS AND APPARATUS

BAE SYSTEMS plc, London ...

1. A surveillance process comprising:
capturing, using a first plurality of pixel sensors in a sensor array, a first plurality of images of an area under surveillance
at a first frame rate;

detecting, by at least one processor, a feature of interest within the area under surveillance within at least one of the
first plurality of images captured at the first frame rate;

determining, by the at least one processor, a region of interest corresponding to the detected feature of interest, the region
of interest being at least one of:

a region within the area under surveillance in which the feature of interest will be located at a later time-step; and
a region within at least one of the first plurality of images of the area under surveillance corresponding to a region within
the area under surveillance in which the feature of interest will be located at the later time-step; and

at the later time-step and using the determined region of interest, capturing, using a second plurality of pixel sensors in
the sensor array, a second plurality of images of a portion of the area under surveillance including the determined region
of interest at a second frame rate, the second frame rate being different than the first frame rate.

US Pat. No. 9,315,332

INTRODUCTION OR WITHDRAWAL OF AN ELONGATE MEMBER TO OR FROM A FREE BODY

BAE Systems plc, London ...

1. A method of moving an elongate member along a predetermined axis for the introduction or withdrawal thereof to or from
a free body, the method including:
providing an elongate guide surface extending parallel to said predetermined axis;
providing a plurality of support elements which are slidable on said elongate guide surface in a direction parallel to said
predetermined axis;

supporting said elongate member on said support elements so that at least a major portion of the mass is supported thereby;
and

causing said elongate member and said support elements to move along said predetermined axis;
wherein the support elements are dismantleable whereby, when the elongate member is supported by a series of three or more
said supporting elements, one of said supporting elements of the series can be dismantled to leave the elongate member supported
in alignment with said predetermined axis by the remaining support elements,

wherein said elongate member comprises a propeller shaft for propelling a naval vessel, and
wherein said free body comprises at least a stern portion of the naval vessel.

US Pat. No. 9,319,961

PORTABLE WIRELESS COMMUNICATIONS APPARATUS

BAE SYSTEMS plc, London ...

1. A portable wireless network comprising:
a fabric having a first side and a second side;
a transmission line formed from a first conductive material and mounted on the first side of the fabric;
at least one portable router coupled to the transmission line, the at least one portable router configured to provide routing
of information between multiple wireless devices in a local area network; and

a first wearable antenna formed from a second conductive material and mounted on at least one of the first side of the fabric
and the second side of the fabric, the first wearable antenna connected to the router via the transmission line, the first
wearable antenna configured to receive and/or transmit at least a portion of the information between the wireless devices
via the local area network.

US Pat. No. 9,305,244

TARGET TRACKING

BAE SYSTEMS plc, London ...

1. A method of tracking a plurality of targets, the method comprising:
for a first time-step, estimating a state of each target;
at a second time-step:
measuring values for a state of a target; and
measuring and updating a value of an identity parameter for the target, wherein the identity parameter at least partially
distinguishes the target from one or more of the other targets;

for the second time-step, estimating a state of each target using the estimated target states for the first time-step;
updating the estimated target states for the second time-step using the measured values for the states of the targets; and
performing an identity management process to estimate a probability that a particular state measurement corresponds to a particular
target, wherein the identity management process comprises: providing a mixing matrix, an element of the mixing matrix being
based on an overlap between the updated estimated target states of targets in an underlying state space of the estimated target
states; and

wherein the providing of the mixing matrix comprises determining a value for an element of the missing matrix as a function
of the state of the particular target at the second time-step, and a set of all state values and identity parameter values
measured at time steps up to and including the second time-step.

US Pat. No. 9,239,394

DETECTION OF IONISING RADIATION

BAE SYSTEMS plc, (GB)

1. A detector unit for detecting ionising radiation, said detector unit comprising:
a scintillator selected to emit light in response to incident radiation;
at least one detector for detecting said emitted light;
at least one optical waveguide for transmitting said emitted light to said detector, wherein said at least one waveguide comprises
a tube that includes a flexible hollow optical fibre containing a replaceable scintillator material in the hollow of the optical
fibre;

a radiation shield including hollow shielding fibers connected to a manifold and pump system operable to selectively introduce
and withdraw different shielding materials to and from the hollow shielding fibres;

a processor configured to receive output from the at least one detector and determine a type of the incident radiation; and
the processor is further configured to select and control the introduction and withdrawal of the different shielding materials
based on the type of the incident radiation determined;

wherein the light emissions are transmitted to said detector down a central space of the tube by total internal reflection.

US Pat. No. 9,203,149

ANTENNA SYSTEM

BAE SYSTEMS plc, London ...

1. An antenna system, comprising:
a phased array antenna for emitting electromagnetic waves as a first nominally parallel beam at a first effective aperture;
and

a dielectric lens arrangement spaced apart from the phased array antenna;
wherein the dielectric lens arrangement comprises a curved inner surface positioned within the near field of the phased array
antenna thereby defining the first effective aperture, the curved inner surface diverging the first nominally parallel beam
to provide diverged rays diverged relative to the first nominally parallel beam and a curved outer surface for converging
the diverged rays relative to the diverged rays to provide a second nominally parallel beam, thereby defining a second effective
aperture larger than the first effective aperture of the phased array antenna.

US Pat. No. 9,156,552

APPARATUS FOR USE ON UNMANNED VEHICLES

BAE SYSTEMS PLC, London ...

1. A method performed by an apparatus, mounted on an unmanned vehicle and arranged to act upon a payload, the payload being
mounted on the unmanned vehicle and, under an action of the apparatus, able to be activated, the method comprising:
receiving an activation instruction from an entity, the entity being remote from the unmanned vehicle, said activation instruction
comprising an indication of a time that the activation instruction was sent from the entity to the unmanned vehicle;

determining whether or not the received activation instruction is valid by performing a validation process, said validation
process comprising determining that the activation instruction is valid only when a time period between the time that the
activation instruction was sent and a time that the validation process is performed is less than a pre-determined threshold;
and

in response to determining that the received activation instruction is valid, activating the payload.

US Pat. No. 9,170,323

PULSE RADAR RANGE PROFILE MOTION COMPENSATION

BAE SYSTEMS PLC, London ...

1. A pulse radar range profile motion compensation method implemented by a radar system comprising a processor, a radar transmitter
and a radar receiver, the method comprising:
i. acquiring, from the radar receiver, samples of radar echo signals generated by a target moving at a range rate, R, and
illuminated during a look by a pulse radar signal, transmitted from the radar transmitter having a carrier frequency, fTx, and comprising a plurality, P, of pulses having a pulse repetition frequency, fPRF;

ii. acquiring from a radar tracker tracking the target an estimate of the range rate of the target;
iii. removing, using the processor, an additional phase acquired by the echo signals in dependence on the estimated range
rate and a time to a pulse since the start of the look;

iv. removing, using the processor, a shift in range cells of the receiver samples in dependence on the estimated range rate
and a time to a pulse since the start of the look;

v. applying, using the processor, a pulse Doppler filter to the receiver samples from step iv;
vi. identifying, using the processor, the peak Doppler frequency corresponding to a skin return of the target and calculating
a shift from zero, fD, of the peak Doppler frequency;

vii. calculating, using the processor, a range rate correction ?? as

viii. adding, using the processor, the range rate correction to the estimate of the range rate to obtain a new range rate
estimate and repeating steps iii. and iv. using the new range rate estimate to obtain motion compensated receiver samples;
and

ix. generating, using the processor, an output signal indicative of the motion compensated receiver samples for generating
a range profile.

US Pat. No. 9,417,398

PLASTIC OPTICAL FIBRES

BAE SYSTEMS plc, London ...

1. A method of creating an optical link between two portions of plastic optical fibres, the method comprising:
providing a first plastic optical fibre comprising a first terminal end with a first optical lens pattern, and
providing a second plastic optical fibre cable, to be optically linked to said first plastic optical fibre, the second plastic
optical fibre cable comprising a first terminal end with a second optical lens pattern, wherein said optical lens patterns
are formed by selecting a portion of fibre to be shaped, the selecting comprising:

providing a shaping surface with a release material thereon, said shaping surface comprising a template which imparts a pattern
onto the portion of fibre;

causing heating and mating of the portion of fibre and said shaping surface;
causing the portion of fibre to be softened, such that it is capable of moulding to the surface structure defined on the template
on said shaping surface, during mating, so as to impart the pattern onto the portion of fibre;

causing the surface of the portion of fibre to cool such that portion of fibre comprising the pattern sets, wherein the cooling
comprises cooling the shaping surface while in mating union with the portion of fibre; and

providing a connector to house said joined first and second plastic optical fibres; wherein the plastic fibres within the
connector are separated by a non-zero distance less than 100 millimeters.

US Pat. No. 9,177,200

OBJECT CLASSIFICATION

BAE SYSTEMS PLC, London ...

1. A method for selecting an optimal observation position for a mine-hunting vessel from which to observe an object to be
classified, said method comprising:
Using a plurality of empirically derived models for the object to be classified, said models comprising observation parameters
defined as observed physical quantities of said object as a function of a measurement variable representing an observer's
angular position relative to said object, and each said model representing a different class of object, said observer being
said mine-hunting vessel;

Selecting a plurality of observer angular positions from which to observe said object;
Determining a respective corresponding value of observation parameter for each selected observer angular position according
to each model in said plurality of empirically derived models;

Determining a value of a probability function using said respective corresponding value of observation parameter for each
said selected observer angular positions according to each said model, wherein said value of said probability function indicates
a classification potential of said object;

Wherein said classification potential of said object is relative:
(i) information or lack of information, for use in a process leading toward classification of said object as one of said models,
that is to be obtained if a measurement of the observation parameter were taken of the object at a respective observer angular
position; and/or

(ii) certainty or uncertainty with which the object could be classified as one of the models if the measurement of the observation
parameter were taken of the object at the respective observer angular position; and

Selecting an observation position for said mine hunting vessel from which to observe said object from said plurality of selected
observer angular positions with a maximum said value of said probability function.

US Pat. No. 9,369,438

SUPERVISED DATA TRANSFER

BAE SYSTEMS plc, London ...

1. An apparatus for controlling a transfer of data between data communications networks, the apparatus comprising:
a data store;
a first computer network interface for accessing a first data communications network and a first user interface for receiving
a first data transfer request to download data from a data source linked to the first data communications network to the data
store, in a first computing environment;

a second computer network interface for accessing a second data communications network and a second user interface for receiving
a second data transfer request to transfer downloaded data from the data store to a recipient device linked to the second
data communications network, in a second computing environment isolated from the first computing environment; and

data transfer control processor comprising hardware with access to the first and second computing environments for controlling
downloads and transfers of data according to the first and second requests, further comprising a supervisory processor configured
to determine that at least the second request originates from a human user and, having so determined, to enable a data transfer
according to the second request, the supervisory processor determining that the first or second request is by other than a
human user when the first or second request is found to be statistically inconsistent, on the basis of one or more metrics
derived from historical data characterizing data transfer requests by a respective user, with data characterizing human behavior,
said one or more metrics being computed from data characterizing data transfer activity by the apparatus over a given time
period.

US Pat. No. 9,120,271

RELIABILITY CENTRED MAINTENANCE

BAE SYSTEMS PLC, London ...

1. A maintenance method based on reliability centred maintenance (RCM), the maintenance method comprising:
performing RCM, producing RCM outcomes;
feeding the RCM outcomes to an identify preventive maintenance requirements process, producing identify preventive maintenance
requirements process outcomes;

feeding the identify preventive maintenance requirements process outcomes to a maintenance repair organisation process, producing
maintenance repair organisation process outcomes;

feeding the maintenance repair organisation process outcomes to a maintenance approved organisation process and an update
process,

the update process comprising
a trigger mechanism process;
a baseline review process;
a continuous review process;
an RCM study process,
wherein the trigger mechanism process receives input from the maintenance repair organisation process and provides input to
the baseline review process, the continuous review process, and the RCM study process;

performing the update process to provide update data for performing the RCM; and
inputting the update data into the performing of the RCM.

US Pat. No. 9,065,458

FREQUENCY SYNTHESIS AND NOISE REDUCTION

BAE SYSTEMS PLC, London ...

1. A local oscillator, comprising:
a signal source for generating an input signal having a prescribed frequency;
a first oscillator and a second oscillator coupled via a first signal path with the signal source;
an array of frequency dividers coupled via a second signal path with the signal source;
at least one frequency multiplier coupled to at least one of the frequency dividers; and
a switch coupled to the array of frequency dividers and the at least one frequency multiplier,
wherein in use, the frequency dividers and the at least one multiplier are operable to generate a plurality of harmonic frequencies
coherent with the prescribed frequency for selectively combining with output from the oscillators on the first signal path
to generate an output signal having a target frequency, the switch being operable to select which of the plurality of harmonic
frequencies is to be combined, and,

wherein the array of frequency dividers and at least one multiplier are arranged to generate the harmonics frequencies such
that they are evenly spaced relative to each other.

US Pat. No. 9,493,233

CAVITY ACOUSTIC TONES SUPPRESSION

BAE Systems plc, London ...

1. A cavity system, comprising:
a cavity (2) and a plurality of rods (4);

the rods (4) are positioned in the proximity of a leading edge (14) of the cavity (2), the leading edge (14) being relative to an actual or intended flow direction (6) of a fluid over the cavity (2);

each of the rods (4) extending lengthwise across at least a part of a width of the cavity (2) in a perpendicular or oblique angle to the actual or intended flow direction (6);

wherein one or more of the rods (4) is positioned further along the flow direction (6) compared to one or more of the other rods (4); and

wherein the positioning of one or more of the rods (4) further along the flow direction (6) compared to one or more of the other rods (4) provides a zig-zag pattern of rod positions.

US Pat. No. 9,329,325

OPTICAL WAVEGUIDES

BAE SYSTEMS plc, London ...

1. An optical waveguide comprising a body of material configured for contained propagation of light therethrough, a surface
relief grating configured to receive the propagating light and at least partially to diffract or reflect it out of the waveguide,
and at least one layer of dielectric material applied to a surface of the surface-relief grating of a thickness that increases
along the length of the waveguide in the direction of said propagation so that the grating exhibits a spatial variation in
efficiency dependent on the increasing thickness of the dielectric material along the length of the waveguide.

US Pat. No. 9,323,056

METHOD OF ALIGNING A HELMET MOUNTED DISPLAY

BAE SYSTEMS PLC, London ...

1. A method of aligning a helmet mounted display, mounted to a helmet worn by a user, the method comprising the steps of:
displaying a first guide symbol at a fixed position in the helmet mounted display such that the first guide symbol moves relative
to the user's view of an external scene with movement of a head of the user;

aligning the displayed first guide symbol with an externally visible reference direction by head movement;
receiving a input by the user as confirmation when the first guide symbol is approximately aligned with the externally visible
reference direction;

generating a first stabilised guide symbol for display in the helmet mounted display at an initial position coincident with
the confirmed position of alignment of the first guide symbol with respect to the externally visible reference direction,
such that the externally visible relative position of the first stabilised guide symbol and the externally visible reference
direction appears in the helmet mounted display to remain substantially unchanged by movement of the head of the user;

moving the position of the first stabilised guide symbol as it appears in the helmet mounted display relative to the externally
visible reference direction to align the first stabilised guide symbol with the externally visible reference direction while
maintaining approximate alignment of the first guide symbol with the externally visible reference direction;

receiving a input by the user as confirmation of alignment of the first stabilised guide symbol with the externally visible
reference direction;

displaying a second guide symbol at a fixed position in the helmet mounted display, separated from the position of the first
guide symbol such that the second guide symbol moves relative to the user's view of the external scene with movement of the
head;

aligning the displayed second guide symbol with the externally visible reference direction by head movement;
receiving a input by the user as confirmation when the second guide symbol is approximately aligned with the externally visible
reference direction;

generating a second stabilised guide symbol for display in the helmet mounted display at an initial position coincident with
the confirmed position of alignment of the second guide symbol with respect to the externally visible reference direction,
such that the relative position of the second stabilised guide symbol and the externally visible reference direction appears
in the helmet mounted display to remain substantially unchanged by movements of the head of the user;

moving the position of the second stabilised guide symbol as it appears in the helmet mounted display relative to the externally
visible reference direction to align the second stabilised guide symbol with the externally visible reference direction while
maintaining approximate alignment of the second guide symbol with the externally visible reference direction;

receiving a input by the user as confirmation of alignment of the second stabilised guide symbol with the externally visible
reference direction; and

determining, using helmet orientation data captured at the receiving the confirmation and aligning steps, the direction of
the user's line of sight through the helmet mounted display relative to the orientation of the helmet and thereby the alignment
of the helmet mounted display with the helmet.

US Pat. No. 9,310,566

OPTICAL WAVEGUIDES

BAE SYSTEMS PLC, London ...

1. An optical waveguide including:
an optical substrate arranged to transmit light under total internal reflection;
a first diffractive grating region associated with the optical substrate and arranged to receive light and to diffract the
received light along the optical waveguide;

an intermediate diffraction grating associated with the optical waveguide and optically coupled to the optical substrate and
to the first diffractive grating region, arranged to receive light diffracted from the first diffractive grating region and
to expand the received light in a first dimension by diffraction; and,

a second diffractive grating region associated with the optical substrate and optically coupled to the intermediate diffraction
grating, arranged to receive light expanded in the first dimension by the intermediate diffraction grating, to expand the
received light in a second dimension orthogonal to the first dimension by diffraction and to output the light expanded in
the first and second dimensions from the optical waveguide by diffraction,

wherein the first diffractive grating region and the second diffractive grating region are diffractive regions of a common
grating and the common grating and the intermediate diffraction grating are separate integers.

US Pat. No. 9,464,872

PROTECTIVE MATERIAL

BAE SYSTEMS plc, Londong...

1. A protective material for dissipating the kinetic energy of a moving object, the protective material comprising:
a plurality of separator layers; and
a plurality of layers of fibrous armour material impregnated with a shear thickening fluid for reducing inter-layer friction
in which at least some adjacent layers of fibrous armour material are separated by one or more of the separator layers, wherein
at least one layer of the fibrous armour material is sandwiched between two of the separator layers,

wherein at least one of the layers in the adjacent layers of fibrous armour material which are separated by the separator
layers is not impregnated with a shear thickening fluid.

US Pat. No. 9,336,446

DETECTING MOVING VEHICLES

BAE SYSTEMS PLC, London ...

1. An autonomous method of detecting substantially in real-time at least one moving vehicle, the method comprising:
receiving image data, from an image capturing device, representing a sequence of image frames over time;
autonomously analysing, in a computer, substantially in real-time, the image data to identify potential moving vehicles; and
comparing, in said computer, at least one said potential moving vehicle with a vehicle movement model that defines a trajectory
of a potential moving vehicle to determine whether the at least one potential moving vehicle conforms with the model; wherein

said vehicle movement model comprises analysing directional data relating to a said moving vehicle determined to conform with
the vehicle movement model to determine if the moving vehicle is moving towards, away or across with respect to a location
where the image data was captured.

US Pat. No. 9,261,579

RADIO POSITIONING OF A MOBILE RECEIVER USING A VIRTUAL POSITIONING REFERENCE

BAE SYSTEMS PLC, London ...

1. A mobile receiver arranged to determine radio positioning information, said mobile receiver comprising:
a primary positioning resource configured for determining a position of the mobile receiver as being at a first receiver position;
a local clock;
a terrestrial receiver configured to scan for signals transmitted by terrestrial transmitters of a plurality of different
transmitter types, said plurality of different transmitter types including at least one type of transmitter that transmits
signals of opportunity that are not intended for navigational use;

a processor configured for distinguishing and identifying from among said signals a first signal transmitted by a first terrestrial
transmitter having a known location, and for analyzing said first signal to determine a distinguishable, predictably repeated
first code word and a repeat rate thereof,

said processor being further configured for establishing a first virtual positioning reference by logging the first receiver
position together with a local time measured relative to said local clock at which a first instance of the first code word
is received by the mobile receiver; and

a differential positioning unit configured for using an output of the local clock to determine a time difference between when
the first virtual positioning reference is predicted to receive a second instance of the first code word and when the mobile
receiver actually receives the second instance of the first code word when at a second receiver position, thereby determining
radio positioning information pertaining to the second receiver position of the mobile receiver and

a display device configured to display the radio positioning information to a user.

US Pat. No. 9,114,867

AIR VEHICLE MOUNTED TRANSMITTING OR RECEIVING EQUIPMENT

BAE SYSTEMS PLC, London ...

1. Equipment for at least one of transmitting and receiving configured for mounting to an intermediate portion of an air vehicle
fuselage, said intermediate portion of said air vehicle fuselage includes, when viewed fore to aft, an underside having a
substantially linear initial portion, a further substantially linear aft portion which is lower than said initial portion,
and said intermediate portion being between said initial and aft portions, such that said initial portion will be forward
of said equipment when mounted, and said aft portion will be aft of said at least one of transmitting and receiving equipment
when mounted, said at least one of transmitting and receiving equipment comprising, in combination: a device for at least
one of transmitting and receiving, having at least a forward field of view, said device being configured for mounting at said
intermediate portion such that said device will extend away from said fuselage; and a fairing component separate from said
fuselage and separate from said device for at least one of transmitting and receiving, configured to be pivotally mountable
to said fuselage at said intermediate portion adjacent said device at a rearward side of said device for reducing aerodynamic
drag, said fairing being retractable, collapsible or repositionable in flight to afford said device a rearward, or more effective
rearward, field of view for said at least one of transmitting and receiving.

US Pat. No. 9,482,867

COMPENSATING FOR HYSTERESIS

BAE SYSTEMS plc, London ...

1. A method of compensating for hysteresis in a system, the method comprising:
providing a system, the system comprising an actuator and one or more components that exhibit hysteresis including a deformable
material, the components that exhibit hysteresis having a wiping-out property, the system comprising a system input and a
system output, the system output being dependent on the system input;

determining an inverse Preisach model for the system, the inverse Preisach model comprising a model input and a model output,
the model output being dependent on the model input, the model input corresponding to the system output, the model output
corresponding to the system input;

ascertaining a desired system output;
determining using the desired system output and the inverse Preisach model for the system, a required system input corresponding
to the desired system output; and

applying, to the system, the determined required system input to deform the deformable material using the actuator; wherein
the step of determining the inverse Preisach model for the system comprises:

defining a plurality of pairs of values, each pair of values comprising a first value and a second value, each of the first
and second values being less than or equal to a maximum system output and greater than or equal to a minimum system output,
the first value being greater than or equal to the second value within each pair; and

for each pair of values, determining a system input corresponding to that pair of values, by:
increasing the system input, from the minimum system input, until the system output is equal to the first value corresponding
to the respective pair of values; and thereafter

decreasing the system input until the system output is equal to the second value corresponding to the respective pair of values,
the value that the system input is decreased to being the determined system input corresponding to that pair of values.

US Pat. No. 9,424,694

ASSESSING PERFORMANCE OF A SYSTEM

BAE SYSTEMS plc, London ...

1. A computer-implemented method of assessing performance of a vehicle system and a mission involving the vehicle system,
the method including:
receiving, by a processor, a sensor signal generated by a sensor, the sensor signal representing an operational state of a
component of the vehicle system;

receiving, by the processor, a single combined model describing a system diagnosis model that describes symptoms, failures,
and link strengths (conditionals) of the component of the vehicle system, and a mission impact model, the mission impact model
describing effects of the component of the vehicle system on an ability of the vehicle system to perform the mission;

generating, by the processor, probability data representing a probability of a failure of the component affecting the ability
of the vehicle system to perform the mission by applying the sensor signal to the single combined model; and

generating, by the processor, a control signal for controlling the vehicle system based on the probability data.

US Pat. No. 9,454,005

LENS DEPLOYMENT APPARATUS

BAE SYSTEMS plc, London ...

1. A partially reflective combiner deployment device, comprising a housing, at least one partially reflective combiner located
on a lower edge of the housing, in a mount, said partially reflective combiner capable of adopting a first stowed configuration
substantially within said housing and a second active configuration in which the partially reflective combiner is configured
to project an image along a line of sight of a user, said mount comprising pivotal fixing points, said pivotal fixing points
pivotally attached to a carrier, wherein said carrier is located within a running groove in said housing, wherein the running
groove is an arc and has a minima at substantially a midpoint of the running groove, such that in use in said second active
configuration, the carrier is located in said minima, such that said partially reflective combiner pivots about a centre line,
wherein said centre line is an axis which intersects and is substantially orthogonal to a Principal axis of the partially
reflective combiner.

US Pat. No. 9,422,060

TURBOPROP-POWERED AIRCRAFT WITH THERMAL SYSTEM

BAE SYSTEMS PLC, London ...

1. A turboprop-powered medium altitude long endurance aircraft, comprising:
a heat exchanger having an air flow channel interlaced with a heat-storage material;
an air inlet arranged to input external air from ground-based cooling air and/or a ram air scoop directly into the air flow
channel so as to cool the heat-storage material; and

an air recirculation path including the air flow channel; wherein
the heat exchanger is configured to cool recirculating air flowing through the air flow channel; and
the air recirculation path is arranged to allow the recirculating air to provide cooling from the air flow channel to the
turboprop-powered medium altitude long endurance aircraft.

US Pat. No. 9,308,993

AIRCRAFT PAYLOAD APPARATUS AND METHOD

BAE SYSTEMS PLC, London ...

1. A method of providing apparatus for use on an aircraft, the method comprising:
providing a first store and a first payload, the first payload being mounted on or at least partially housed within the first
store, the first store being for mounting to an external surface of the aircraft such that the combination of the first store
and first payload is wholly outside the aircraft;

acquiring one or more aerodynamic properties, one or more moments of inertia, and the mass distribution of the combination
of the first store and first payload;

providing a second store and a second payload, the second payload being mounted on or at least partially housed within the
second store, the second store being for mounting to an external surface of the aircraft such that the combination of the
second store and the second payload is wholly outside the aircraft, the second payload being different to the first payload,
the second payload comprising a sensor and/or a projecting means, the sensor being for measuring parameters of one or more
entities that are remote from the aircraft, the projecting means being for projecting a mark onto a surface; and

configuring the second store and the second payload such that the one or more aerodynamic properties, one or more moments
of inertia, and the mass distribution of the combination of the second store and the second payload are substantially the
same as those of the combination of the first store and first payload, thereby providing the apparatus.

US Pat. No. 9,081,093

PROCESSING SAR IMAGERY

BAE SYSTEMS plc, London ...

1. A method of processing SAR imagery data for automatic target detection based on change detection, the SAR imagery data
comprising first SAR image data and second SAR image data, the method comprising:
determining variance ratio data from the first SAR image data;
determining variance ratio data from the second SAR image data; and
determining a change detection threshold based on the F-distribution of the determined variance ratios data.

US Pat. No. 9,058,026

COMPENSATING FOR HYSTERESIS

BAE SYSTEMS plc, London ...

1. A method of compensating for hysteresis in an adaptive optics system for deforming a mirror, comprising:
determining an estimate of an input of the system using an inverse Preisach model by calculating input value x, according
to the formula:


where:
x is an input value;
k is a counter;
n is an upper value for the counter;
? is a level to which output is increased as the input x is increased;
? is a level to which output is decreased as the input x is decreased;
by determining a value of x?? for each ?-? pair in a discrete set of ?-? pairs, wherein x?i?j is the input of the system resulting from increasing an output of the system from a minimum output to a value of ?i and then decreasing it to a value of ?j;

deforming the mirror and measuring a value of a system parameter with a sensor; and
determining an updated estimate for the input of the system using the measured value of the parameter of the system, where
if ?n and ?n are in the discrete set, adjusting the value of x?n?n by an amount equal to a constant multiplied by the difference between the first estimate of a system parameter and the measured
value of the system parameter; and

if ?n and ?n are not in the discrete set, adjusting the values of x?? for other ?-? pairs of the discrete set by an amount equal to a constant multiplied by the difference between the first estimate
of a system parameter and the measured value of the system parameter.

US Pat. No. 9,851,431

RADAR

BAE SYSTEMS plc, London ...

1. An antenna system comprising:
a directional antenna adapted to rotate through a range of directions in azimuth and responsive to radio-frequency (RF) signals
received from directions within said range of directions in azimuth;

a receiver arranged to receive said RF signals from the antenna within a signal frequency response band of the receiver and
to provide a corresponding output for signal processing;

a signal filter operable to block a said output from the receiver when the frequency of the RF signal lies at a frequency
within the signal frequency response band; and

a controller arranged to apply said signal filter when the directional antenna is directed to a predetermined azimuth and
to not apply the signal filter otherwise.

US Pat. No. 9,497,886

AIR COOLING

BAE SYSTEMS plc, London ...

1. Ambient air cooling apparatus for a radar array comprising:
a plenum chamber having a first portion and a second portion, the first portion containing radar array elements to be cooled,
the second portion having at least one first air outlet;

an air inlet including an inlet shutter and a baffle for controlling the ingress of air into the cooling apparatus, said inlet
shutter being powered and movable between a fully open position and a fully closed position;

a heater mounted in a heater chamber for heating air moving within said cooling apparatus from the second portion to the first
portion of the plenum chamber;

an intermediate chamber defined by a bypass shutter separating the intermediate chamber and the heater chamber, a first pair
of fans separating the intermediate chamber from the second portion of the plenum chamber, a first wall positioned between
the bypass shutter and a second wall of the intermediate chamber, the first wall having a second air outlet and an outlet
shutter spaced from the bypass shutter and the second wall, the first pair of fans being arranged to draw air through said
plenum chamber over the radar array elements to be cooled and into the intermediate chamber;

a second pair of fans arranged to draw air through said plenum chamber over the radar array elements to be cooled and to said
at least one first outlet;

said bypass shutter being powered and movable between a fully closed position and a fully open position, the outlet shutter
being powered and movable between a fully closed position, a fully open position, and at least one intermediate position in
order to control the flow rate of air recirculating in the apparatus from the intermediate chamber into the heater chamber,
each of said first and second pairs of fans having a backflow shutter that closes when the fans are non-operational, the backflow
shutters of the second pair of fans being configured to close to recirculate all the air entering the air inlet into the intermediate
chamber;

a first sensor located adjacent said baffle for determining the temperature of air at said air inlet and a second sensor located
in said first portion for determining the temperature of air passing over the radar elements; and

a controller configured to control the operation of said heater, said inlet shutter, said outlet shutter, said bypass shutter,
said first and second pairs of fans and said backflow shutters in order to control a flow rate of air recirculating through
the heater chamber based on the temperature of ambient air entering the cooling apparatus and the temperature of the air passing
over the radar elements.

US Pat. No. 9,448,406

IMAGE DISPLAY SYSTEMS

BAE SYSTEMS PLC, London ...

1. A method for aligning an image generated by an image display system including an image intensifier with a line of sight
of a user of the image display system, including the steps of:
a) displaying to the user a first symbol on an image display;
b) aligning the first symbol with a reference symbol by head movement;
c) recording the head movement to align the first symbol with the reference symbol;
d) displaying to the user at least one alternate symbol on the image display;
e) aligning the alternate symbol with the reference symbol by head movement;
f) recording the head movement to align the alternate symbol with the reference symbol;
g) determining magnification of a forward scene induced by the image intensifier based on the recorded head movements in steps
c) and f).

US Pat. No. 9,367,819

SENSOR DATA PROCESSING

BAE SYSTEMS PLC, London ...

1. A method of processing data, the data comprising: a set of one or more system inputs, and a set of one or more system outputs,
wherein each system output corresponds to a respective system input, each system input includes a plurality of data points,
a first data point in the plurality and a second data point in the plurality being from a same raw data source, and the first
data point being pre-processed using a first pre-processing function that is different from a second pre-processing function
used to pre-process the second data point, the method comprising:
for each of the first and second data points, calculating, by a computer processor, a value indicative of a relative contribution
of each of the first and second pre-processing functions to the system output that corresponds to the first and second data
points;

wherein the calculating of the value includes performing a machine learning algorithm on the first and second data points.

US Pat. No. 9,400,384

DISPLAY ASSEMBLY, IN PARTICULAR A HEAD MOUNTED DISPLAY

BAE SYSTEMS plc, London ...

1. A display assembly, comprising:
a display device having a plurality of pixels or sub-pixels;
a microlens array; and
an eye or pupil tracker and/or a head tracker;
wherein one or more of the plurality of pixels or sub-pixels of the display device are associated with each microlens of the
microlens array, and

wherein the assembly is adapted such that, for each microlens, only one respective pixel or sub-pixel of the display device
is activated or selected for any particular determined pupil or eye or head position.

US Pat. No. 9,136,563

RECHARGEABLE BATTERIES

BAE SYSTEMS PLC, London ...

1. A method of producing a rechargeable battery having two electrode layers separated by a separator layer, the electrode
layers and separator layer together defining a fibre-reinforced composite material, which method comprises:
forming at least one of the electrodes by:
making an active mixture by:
mixing an active particulate material with a porogen; and thereafter mixing the combined particulate material and porogen
with a settable or curable matrix material;

contacting a fibre-reinforcing layer with the active mixture;
allowing said matrix material to set or cure in contact with said fibre-reinforcing layer; and
thereafter removing said porogen to provide a composite matrix material having a porous structure including pores allowing
at least one of ion transport and surface access to said active particulate material.

US Pat. No. 9,473,183

ANTENNA SYSTEM CALIBRATION

BAE SYSTEMS plc, London ...

1. A method for calibrating an antenna system including an antenna element(s) connected to a signal receiver unit(s) at an
RF signal input port thereof, the method comprising:
generating an RF calibration signal;
applying the RF calibration signal to the RF signal input port of the signal receiver unit(s) without applying the calibration
signal via the antenna element(s);

measuring the response of the antenna system to the calibration signal;
calculating a signal correction according to the measured response; and
applying the signal correction to the response of the antenna system to signals subsequently received at said signal receiver
unit(s) via the antenna element(s) of the antenna system,

wherein the antenna system comprises a rotary antenna, the method further comprising:
outputting from the signal receiver unit(s) an RF analogue signal as a response thereof to the applied RF calibration signal;
receiving the analogue RF signal at an optical modulator(s) and modulating an optical signal therewith to produce a modulated
analogue optical signal(s);

optically transmitting the modulated analogue optical signal(s) to an opto-electrical converter via an optical rotary joint
including a reversion prism;

converting said modulated analogue optical signal(s) into an analogue electrical signal(s) using said opto-electrical converter(s);
and

calculating a signal correction(s) according to the analogue electrical signal(s).

US Pat. No. 9,457,546

MOUNTING ARRANGEMENTS

BAE SYSTEMS plc, London ...

1. A non-penetrating data transfer mounting arrangement configured for use on a surface of a solid rigid substrate which in
use is subjected to strains in excess of 0.5×10?3, which arrangement comprises:
a first acoustic transducer, and a first strain isolating element having a relatively narrow stem portion having a first surface
configured for attachment to a first surface of said substrate and an enlarged head portion having a second surface configured
for attachment to an attachment interface of said first acoustic transducer, the stem portion and the head portion forming
a solid region of material between the first and second surfaces of the first strain isolating element, the first strain isolating
element being configured such that when said substrate is subjected to a compressive strain in use, the strain at said second
surface of said first strain isolating element is lower than that at said first surface of said first strain isolating element;
and

a second acoustic transducer, and a second strain isolating element having a relatively narrow stem portion having a first
surface configured for attachment to a second surface of said substrate and an enlarged head portion having a second surface
configured for attachment to an attachment interface of said second acoustic transducer, the stem portion and the head portion
forming a solid region of material between the first and second surfaces of the second strain isolating element, the second
strain isolating element being configured such that when said substrate is subjected to a compressive strain in use, the strain
at said second surface of said second strain isolating element is lower than that at said first surface of said second strain
isolating element,

a flexural mounting disposed between the periphery of the enlarged head of each said first and second strain isolating elements
and said substrate to reduce flexing movement of the periphery of each said head;

wherein said first strain isolating element and said second strain isolating element being aligned with respect to each other
on said first and second surfaces of said substrate such that a non-penetrating data transfer is passed through said substrate
when said substrate is subjected to strains in excess of 0.5×10?3;

wherein the flexural mounting comprises a plurality of hinges; and
wherein each of the first and second strain isolating elements further comprises an annular ring attached to the periphery
of each respective enlarged head and configured to attach to the substrate, the plurality of hinges being disposed between
the periphery of each respective enlarged head and the annular ring.

US Pat. No. 9,321,378

VEHICLE SEAT

BAE SYSTEMS Plc, London ...

1. A seat system for a vehicle, the seat comprising:
a substantially vertical support constructed and arranged for attachment to a wall of the vehicle;
seat components comprising:
a back member for supporting an occupant's back when in use,
a base member, comprising a front edge and a back edge, the base member being for configuration in a first condition where
the base member extends generally perpendicularly from the back member and is suitable for accommodating an occupant in a
sitting position, and being for configuration in a second condition where the base member is retracted and thereby tends to
reduce a profile of the seat, and

a side member;
a seat element including a seat chassis for supporting the seat components; and
an attachment comprising:
a first link extending from a first pivot joint on the side member of the seat chassis to a first pivot joint on the base
member, and

a second link extending from a second pivot joint on the same side member of the seat chassis as the first link to a second
pivot joint on the base member, wherein the first and second links, the base member and the seat chassis thereby provide a
four bar linkage,

the first and second links of the four bar linkage being configured to connect the base member to the seat chassis such that
the base member may be selectively configured between the first condition and the second condition, wherein selectively configuring
from the first condition to the second condition will cause the base member to rise at the back edge with respect to a point
on the at least one side member, and dip at the front edge of the base member with respect to the point on the at least one
side member,

wherein said seat element is slidably mounted in a substantially vertical direction along said substantially vertical support.

US Pat. No. 9,122,278

VEHICLE NAVIGATION

BAE Systems PLC, London ...

1. A method for establishing a route for an autonomous vehicle and controlling the vehicle, the method comprising:
determining localisation information for the vehicle with respect to a first frame of reference by performing a perception
process that includes receiving measurements at a measurement interval to localise the vehicle with respect to the first frame
of reference, the first frame of reference being a frame of reference that is substantially fixed with respect to a current
state of the vehicle;

determining localisation information for the vehicle with respect to a second frame of reference by performing a perception
process that includes receiving signals at a signal interval rate to localise the vehicle with respect to the second frame
of reference, the second frame of reference being a frame of reference that is substantially fixed with respect to an entity,
the entity being different to the vehicle, and the vehicle being moveable with respect to the entity;

establishing a route for the vehicle with respect to the second frame of reference using the localisation information for
the vehicle with respect to the second frame of reference;

performing a transformation of the route from the second frame of reference to the first frame of reference, thereby providing
a transformed route;

determining a control route for the vehicle with respect to the first frame of reference using the localisation information
for the vehicle with respect to the first frame of reference and the transformed route; and

controlling the vehicle to follow the control route as determined from the signal that has been most recently received to
localise the vehicle with respect to the second frame of reference;

wherein the measurement interval is less than the signal interval.

US Pat. No. 9,106,322

ACOUSTIC TRANSMISSION

BAE SYSTEMS PLC, London ...

1. An apparatus for the transmission of data-bearing acoustic signals through a solid rigid substrate, the apparatus comprising:
a first acoustic transducer for converting data-bearing electrical signals into data-bearing acoustic signals, the first transducer
being mounted on a first face of a solid rigid substrate to transmit the acoustic signals into the substrate, the first transducer
comprising an upper electrode and a lower ground plane electrode, the first transducer being mounted via a first intermediate
element disposed between the first transducer and the first face of the substrate; and

a second acoustic transducer mounted on a second face of the substrate so as to receive the acoustic signals emitted by the
first transducer and to convert the acoustic signals into data-bearing electrical signals, the second transducer comprising
an upper electrode and a lower ground plane electrode, the second transducer being mounted via a second intermediate element
disposed between the second transducer and the second face of the substrate;

wherein the intermediate elements are shaped such that the first and second transducers are positioned relative to each other
and/or to the substrate such that multiple-transit acoustic signals propagating between said first and second transducers
are directed away from the second transducer and/or are attenuated by interference, and thereby suppressed.

US Pat. No. 9,096,146

VEHICLE SEAT

BAE SYSTEMS plc, London ...

1. A seat system for a vehicle, configurable to enable an occupant to be seated either in a lower position or in an upper
position, the seat system comprising:
a vertical support constructed and arranged to be secured in a substantially vertical orientation to a wall of the vehicle;
a base member to provide a seating surface for accommodating an occupant in the lower position;
a seat back positioned to extend generally upwards from the base member to support an occupant's back, the seat back being
slidable along the vertical support in the vertical direction between the lower position and the upper position;

a perch member selectively deployable either:
in a first condition, where the perch member is configured as an extension of the seat back to provide back support for the
occupant when in the lower position, or

in a second condition, where the perch member is configured as an additional base member to provide another seating surface
for an occupant when in the upper position;

a fastener for securing the perch member when in the second condition; and
a linkage extending between the seat back and a point on the perch member substantially towards a lowermost end of the perch
member, the linkage being arranged to lock when the perch member is configured into the second condition such that the linkage
acts as a strut supporting weight of an occupant.

US Pat. No. 9,935,776

CONTROL SYSTEMS FOR UNMANNED VEHICLES

BAE SYSTEMS plc, London ...

1. A control system for an unmanned vehicle, the control system comprising:a control processing unit arranged to receive input signals from one or more sensors and to supply output signals to one or more actuators, the control processing unit comprising a plurality of processing modules which are arranged into a plurality of stages, wherein the stages are successively linked with outputs from a plurality of the processing modules in a preceding first stage being coupled to inputs of one or more of the processing modules in a subsequent second stage, the first stage configured to receive the input signals from the one or more sensors, the second stage configured to receive the outputs of the first stage;
wherein, in the first stage, the plurality of the processing modules produce substantially equivalent payload data and each of the processing modules includes a message cryptography unit which generates cryptographically signed messages containing a source field representing a message source at the first stage, a destination field representing a message destination at the second stage, and the payload data, the message cryptography unit configured to generate a digital signature based at least in part on the message source at the first stage, the message destination at the second stage, and the payload data, wherein the cryptographically signed messages include the digital signature, and
wherein, in the second stage, each of the one or more processing modules comprises a voting cryptography unit which receives the cryptographically signed messages from the plurality of processing modules of the first stage, examines the cryptographically signed messages to verify whether the cryptographically signed messages include the message source at the first stage and the message destination at the second stage, and applies voting logic to derive a validated payload data from the cryptographically signed messages for use by the processing module of the second stage.

US Pat. No. 9,473,354

ASSIGNING RESOURCES TO RESOURCE-UTILISING ENTITIES

BAE SYSTEMS PLC, London ...

1. A method of assigning a resource from amongst a plurality of resources to a resource-utilising entity from amongst a plurality
of resource-utilising entities, wherein a resource-to-resource-utilising entity assignment has an associated cost, the method
comprising:
computing network flow costs of assignments for assigning said resources to said resource-utilising entities;
constructing/updating a flow network including source nodes corresponding to the resources, transhipment nodes corresponding
to the assignments and a demand node, the flow network having arcs representing flow between the nodes, each said arc having
an associated said network flow cost;

computing said network flow cost of each said arc in accordance with at least one arc cost approximation scheme, wherein the
computing of the network flow costs comprises:

computing the network flow costs (Cf) for assignments satisfying an equation:


wherein:
a represents a resource from said plurality of resources;
ps(a,t)=Probability that asset a successfully executes task t when it is assigned to it,

at(m) represents an assigned resource for the mtth transhipment node to entity t;

t(mt) represents said transhipment node in the flow network denoting a mtth assignment to entity t;

U(t) represents a penalty cost U(t) if an entity t is not properly served by a resource;
pf(a, t) represents a probability that said resource a will fail in properly serving an entity t when assigned to it; and

Ca(a, t) represents a cost for assigning a resource a to an entity t;

solving a Minimum Cost Flow problem for the flow network with negated arc costs to obtain flow values for the assignments;
and

assigning said resource to said resource-utilising entity dependent on the flow value obtained for said assignment associated
with said resource.

US Pat. No. 9,464,894

LOCALISING A VEHICLE ALONG A ROUTE

BAE SYSTEMS plc, London ...

9. Apparatus for localizing a vehicle along a route, the apparatus comprising:
a camera for obtaining current view images of the route as the vehicle traverses the route;
a repository of previously captured orthographic images of the route, obtained during a survey of the route; and
a processor for resolving a pose of the vehicle along the route by processing the current view images obtained with the camera,
with the previously captured orthographic images of the route, by maximising a relation between the previously captured orthographic
images and the current view images, wherein maximising a relation comprises maximizing mutual information between the previously
captured orthographic images and the current view images,

wherein maximising mutual information between the previously captured orthographic images and the current view images includes
evaluating Shannon entropy of the previously captured orthographic images and the current view images individually and jointly.

US Pat. No. 9,418,646

METAMATERIAL

BAE Systems plc, London ...

1. A metamaterial for attenuating acoustic transmission, the metamaterial comprising a plurality of layers, each layer comprising:
(a) a transmission structure, and
(b) a resonator, coupled to the transmission structure,
wherein the transmission structure in a layer is coupled by a coupling element to the transmission structures of the layer(s)
neighboring said layer; wherein the resonator in a layer is coupled by a coupling element to the transmission structure of
the layer(s) neighboring said layer.

US Pat. No. 9,104,911

OBJECT CLASSIFICATION

BAE SYSTEMS PLC, London ...

1. A method of processing an observation of an object to be classified by a mine classifier, the method comprising:
providing at least one processor of said mine classifier in operative communication with at least one particle filter;
providing a storage means containing a plurality of empirically derived models of mines, wherein each said empirically derived
model in said plurality comprise a physical quantity that characterizes exterior shape and size of mines belonging to a class
of mines and a plurality of angles from which said physical quantity is measured;

observing with at least one sensor in operative communication with said mine classifier an object to be classified, wherein
said object to be classified is of the same type as at least one of those previously empirically derived models of mines;

storing said at least one observation of said object to be classified in memory or on a non-transitory storage medium;
using said particle filter to compare said empirically derived models to said at least one stored observation; and
providing a probability of a match between said at least one empirically derived model and said at least one stored observation.

US Pat. No. 9,475,572

PROPELLER OPERATION

BAE Systems plc, London ...

1. A method of operating a propeller, the propeller moving through a fluid, the method comprising:
measuring a value of a property of the fluid;
measuring a value of a parameter, the parameter being related to one or more forces applied to the propeller or derived at
least in part from action of the propeller;

using the measured value of the property of the fluid and the measured value of the parameter, determining a desired rotational
speed for the propeller; and

controlling the propeller such that the rotational speed of the propeller is equal to the determined rotational speed.

US Pat. No. 9,465,213

WAVEGUIDES

BAE SYSTEMS plc, London ...

1. A projection display, for displaying an image to an observer, including:
a first waveguide element arranged to be light transmissive;
an image-providing light source device arranged to generate an image and to inject image bearing light into the first waveguide
element;

a first grating associated with the first waveguide element arranged to direct the image bearing light internally along the
first waveguide element under total internal reflection and via which the image bearing light is outputted from the first
waveguide element;

a second waveguide element arranged to be light transmissive and transparent that includes a second grating arranged to receive
the image bearing light from the first waveguide element and to direct the image bearing light along the second waveguide
element under total internal reflection;

the second waveguide element further includes a third grating arranged to diffract received image bearing light out of the
second waveguide element towards an observer; and

wherein an optical element associated with each waveguide element is arranged to receive and disperse a discrete point of
image bearing light incident upon the optical element at a single first angle over a continuum of second angles within the
respective first and second waveguide elements.

US Pat. No. 9,418,598

COLOUR DISPLAY

BAE SYSTEMS plc, London ...

1. A color sequential display method, the method comprising, in a given frame: providing, a display panel having a plurality
of pixels constructed and arranged to be illuminated via an illumination source by one of a group of subframes that includes
a first subframe, a second subframe and a third subframe of the frame, each subframe occupying a separate respective temporal
part of the frame and in that order, the display panel further constructed and arranged such that a given one of the plurality
of pixels is driven substantially during only one of the first subframe, the second subframe and the third subframe in the
given frame to display an output color; causing the illumination source to generate a first and only illumination color during
the first subframe; causing the illumination source to generate a second and only illumination color during the third subframe;
and causing the illumination source to generate both of the first and second illumination colors only during the second subframe,
such that the output color comprises: substantially only the first illumination color when the given pixel is driven in the
first subframe to provide illumination from the illumination source; substantially only the second illumination color when
the given pixel is driven in the third subframe to provide illumination from the illumination source; and both the first illumination
color and the second illumination color simultaneously when the given pixel is driven in the second subframe to provide a
third illumination color as illumination from the illumination source, the third illumination color being an illumination
color provided by mixing of the first and second illumination colors, wherein the first illumination color is green, the second
illumination color is red, and the third mixed illumination color is provided by mixing the green and the red.

US Pat. No. 9,219,511

HIGH-INTEGRITY DATA TRANSMISSION SYSTEM

BAE SYSTEMS plc, London ...

1. A data receiver for use with a data-transmission system having a first channel and a second channel for transmitting nominally-identical
data, the receiver comprising:
inputs for receiving separately a first message including a first address label and first data from the first channel and
a second message including a second address label and second data from the second channel;

an inverting mechanism for logically inverting the second message received from the second channel;
first and second data-handling devices for receiving separately the first message from the first channel and the inverted
second message from the second channel, respectively, and outputting separately the first message to a first message store
for storing at a first address coincident with the first address label and the inverted second message to a second message
store for storing at an inverted second address coincident with the second address label as inverted; and

a processor configured to retrieve the inverted second message from the second message store, to re-invert the inverted second
data to retrieve the first message from the first message store at the first address and to compare the first data and the
re-inverted inverted second data to identify a common mode failure.

US Pat. No. 9,109,988

CORROSION SENSORS

BAE SYSTEMS plc, London ...

1. A corrosion sensor comprising:
an insulating substrate;
a thin film of a first metallic material formed on the substrate, the thin film constructed and arranged in a ladder-like
configuration including a plurality rung-like features;

an array of separate areas comprising a second metallic material, positioned on the plurality of rung-like features;
a plurality of electrical terminals defined by the thin film for monitoring electrical resistance of the thin film; and
a plurality of resistive tracks defined by the rung-like features of the thin film, at least portions of the plurality of
resistive tracks providing a plurality of separate electrical pathways between the electrical terminals, wherein the separate
areas comprising the second metallic material are provided at surfaces of the portions of the plurality of resistive tracks
that provide the plurality of separate electrical pathways for enhancing a rate of galvanic corrosion of the thin film.

US Pat. No. 9,063,217

RADAR SYSTEM AND METHODS OF CONTROLLING A RADAR SYSTEM AND THE PROVISION OF A RANGE-DOPPLER TARGET IMAGE SIGNATURE

BAE SYSTEMS plc, (GB)

23. A radar system comprising:
receiver apparatus arranged to receive a radar return signal and to generate a range-Doppler target image signature; and
a controller, and an associated computer program stored in non-transitory form which will configure the controller to:
a. select a spectral line within the range-Doppler target image signature from a modulation feature on the target which comprises
an effective point scatterer;

b. provide a range profile for the spectral line;
c. obtain a reference range profile of a reference point scatterer;
d. determine a difference between a power at a range shorter than a peak corresponding to the modulation feature in the range
profile and a power at a corresponding range of the reference range profile;

e. determine whether the difference is above a threshold value; and
f. where the difference is not above the threshold value, generate a first control signal arranged to cause provision of the
range-Doppler target image signature, and, where the difference is above the threshold value, generate a second control signal
arranged to prevent provision of the range-Doppler target image signature.

US Pat. No. 9,528,568

VIBRATION ISOLATION

BAE SYSTEMS plc, London ...

1. A mounting system for mounting machinery, and for isolating vibration therefrom, the system comprising:
a support for said machinery, including a plurality of resilient mounts, and a controller for controlling the stiffness of
the mounts as a function of frequency, each mount comprising a passive resilient element configured to fully support a static
load of the machinery, and an active isolation element,

wherein the controller is configured to control the active isolation element such that: at or below a resonant frequency of
the passive resilient element, a performance parameter of the support is essentially that of the passive resilient element;
and above the resonant frequency of the passive resilient element, forces generated by the passive resilient element in response
to local displacements of the passive resilient element are essentially cancelled out by the active isolation element to maintain
a zero stiffness of the support to excited structural resonances, and

wherein said controller is configured to apply a notch filter in the transmissivity of force between the machinery and the
support to attenuate transmission of a specific detected problem out-of-balance force.

US Pat. No. 9,487,289

CAVITY ACOUSTIC TONES SUPPRESSION

BAE Systems plc, London ...

1. A cavity system, comprising:
a cavity (2) recessed in a surface (19); and

a plate (104);

the plate (104) comprising a plurality of holes (4) through it, wherein the proportion of the area of the plate (104) taken up by the holes is ?60%;

the holes comprising one or more flow alteration elements (34, 38) provided at one or more of the holes (4), the one or more flow alteration elements (34, 38) comprising at least one of an elongate member (34) positioned across the hole (4) and a vane (38) proximate the hole;

the plate (104) being positioned in the proximity of a leading edge (14) of the cavity (2), the leading edge (14) being relative to an actual or intended flow direction (6) of a fluid over the surface (19) and the cavity (2);

the plate (104) arranged with the surface of the plate (104) at a perpendicular or oblique angle to the actual or intended flow direction (6).

US Pat. No. 9,441,980

ROUTE PLANNING

BAE SYSTEMS plc, London ...

1. A method of determining a route for a vehicle by using a first route planning algorithm and a second route planning algorithm
to achieve one or more objectives, the method comprising:
providing a set of routes, each route in the set of routes being a pre-determined route from an identified starting location
to an identified desired terminal location, each route in the set of routes having been determined using the first route planning
algorithm, wherein the first route planning algorithm comprises:

defining a plurality of points within a region, the region being a region within which the vehicle moves; and
constructing, by one or more computer processors, a plurality of routes between the identified starting location and the identified
desired terminal location via a plurality of segments, each segment connected to at least one of the defined points within
the region,

wherein at least two of the segments in each of the routes have equal lengths,
wherein at least two of the equal length segments in a first route have a first angle with respect to a common bearing,
wherein at least one of the equal length segments in a second route has the first angle of the first route with respect to
the common bearing, and

wherein at least one of the equal length segments in the second route has a second angle that is different from the first
angle of the first route with respect to the common bearing; and

acquiring, by the one or more computer processors, information specifying the identified starting location for the vehicle;
acquiring, by the one or more computer processors, information specifying the identified desired terminal location for the
vehicle;

using the acquired starting location information and the acquired desired terminal location information, selecting, by the
one or more computer processors, one or more routes from the provided set of routes, the selection of a route from the set
of routes being dependent upon the identified starting location and the identified desired terminal location;

using the acquired starting location information, the acquired desired terminal location information, and the selected one
or more routes, performing, by the one or more computer processors, the second route planning algorithm to determine a route
for the vehicle, the determined route for the vehicle being a route from the identified starting location to the identified
desired terminal location, wherein the second route planning algorithm comprises performing an optimization process using
the selected one or more routes as at least part of an initial set of routes for the optimization process, the optimization
process being performed such that optimization is performed with respect to the one or more objectives; and

determining, by the one or more computer processors, the route for the vehicle to achieve a solution to the one or more objectives,
wherein:
the determined route for the vehicle comprises at least one of the constructed routes and at least one route that has been
determined using the second route planning algorithm,

the first route planning algorithm and the second route planning algorithm are different route planning algorithms, and
the one or more objectives comprises at least one of: minimizing an amount of fuel that would be used by the vehicle to travel
the determined route; minimizing an amount of time that would take the vehicle to travel the determined route; and minimizing
a likelihood that the vehicle would be detected by an entity remote from the vehicle while following the determined route.

US Pat. No. 9,429,076

TURBOPROP-POWERED AIRCRAFT WITH THERMAL SYSTEM

BAE SYSTEMS PLC, London ...

1. A turboprop-powered medium altitude long endurance aircraft, comprising:
a gas turbine engine configured for providing propulsion power to an aircraft propeller;
a heat scavenging apparatus configured for scavenging heat from the gas turbine engine;
a heating apparatus comprising a first heat exchanger;
a recirculating air path;
a further heat exchanger in the recirculating air path; wherein
the first heat exchanger is arranged to use the scavenged heat to heat air in the recirculating air path;
the further heat exchanger comprises a heat-storage material having a melting point selected so as to be rendered solid when
cooling and is arranged to cool air recirculating around the recirculation air path; and

the recirculating air path is arranged to provide cooling and/or heating to the turboprop-powered medium altitude long endurance
aircraft.

US Pat. No. 9,129,744

ELECTRICAL POWER SOURCES HAVING A COMPOSITE STRUCTURE INCLUDING HOLLOW FIBERS

BAE SYSTEMS PLC, London ...

1. An electrical power source comprising:
at least one hollow fibre incorporated in a material structure, wherein said at least one hollow fibre forms part of an electric
circuit for storing or generating electrical power, wherein the at least one hollow fibre contains a first electrolyte and
via the first electrolyte acts as an ion bridge between two compartments both including a second electrolyte and electrode,
respectively.

US Pat. No. 9,054,427

PLANAR VIVALDI ANTENNA ARRAY

BAE SYSTEMS plc, London ...

1. A planar Vivaldi antenna array comprising:
a substrate comprising an upper conductive layer and a lower conductive layer;
a plurality of slots at an end of the antenna array, the slots extending through the whole thickness of the planar structure
of the antenna array; and

a plurality of grooves extending from the slots; wherein:
the grooves do not extend through the whole thickness of the planar structure of the antenna array; and
the cross-sectional shape of the grooves is complementary to the cross-sectional shape of the slots;
the upper conductive layer or the lower conductive layer extend into the grooves and over surfaces of the grooves; and
the upper conductive layer or the lower conductive layer extend into the slots and over surfaces of the slots.

US Pat. No. 9,470,481

ARMOR ASSEMBLY

BAE SYSTEMS plc, London ...

1. An armor system, comprising:
a rigid frame formed from a top wall, a bottom wall, and two side walls; and
at least two elongate armor plates that each have an elongate axis, wherein said elongate armor plates are arranged inside
said rigid frame and in a chevron pattern at a non-zero angle (?)° with respect to one another and with said elongate axes
of said elongate armor plates arranged substantially parallel with respect to one another, wherein said at least two elongate
armor plates comprise a plurality of perforations and further wherein each of said elongate armor plates provides an outermost
surface of the armor system;

wherein the armor system is a removable appliqué system,
wherein the at least two elongate armor plates are fixed with respect to each other, and
wherein the armor system comprises a plurality of sets of said at least two elongate armor plates constructed and arranged
in a repeating arrangement.

US Pat. No. 9,190,731

RADAR ANTENNA

BAE SYSTEMS plc, London ...

1. An antenna for a phased array comprising at least one antenna element, a feed structure for the antenna element extending
to the antenna element substantially normally thereto through a dielectric substrate, an array of discrete elongate elements
distributed through the dielectric substrate, and a ground plane, each of the discrete elongate elements of the array being
spaced apart from the feed structure and disposed with their longitudinal axes aligned in a first direction that is parallel
to the feed structure,
each of the discrete elongate elements of the array being suspended between and separated from, each of the at least one antenna
element and the ground plane.

US Pat. No. 9,952,137

CORROSION SENSOR HAVING DOUBLE-ENCAPSULATED WIRE CONNECTIONS AND MANUFACTURING METHOD FOR IT

BAE Systems plc, London ...

1. A method of manufacturing a corrosion sensor, the corrosion sensor including a chip comprising a number of metallic strips mounted on a non-conducting substrate and a module for forming electrical connections to the strips whereby to enable communication between the strips and monitoring equipment for the sensor, the module including a number of wire connections, the method including the steps of manually coating at least some of the wire connections with a preliminary sealing compound and curing the preliminary sealing compound followed by encapsulating the wire connections within a flexible epoxy compound said flexible epoxy compound being a different compound than said preliminary sealing compound, and subsequently, encapsulating the flexible epoxy compound within a second sealing compound of aircraft sealant by an injection moulding process, said aircraft sealant having a service temperature range of between ?62° C. and 216° C.

US Pat. No. 9,829,450

STRUCTURAL HEALTH MONITORING

BAE Systems plc, London ...

1. A method of structural health monitoring of a bonded joint in a composite structure, wherein said composite structure comprises
a plurality of fibre plys in a binder matrix, wherein said structure comprises at least one non-reinforcing thermal element,
wherein the thermal element is electrically isolated from the fibre plys, the method comprising:
applying a stimulus to cause heating of said thermal element, wherein the stimulus is resistive heating;
removing the stimulus;
measuring a thermal element decay profile, said thermal element decay profile being a change of electrical resistance of said
thermal element as a function of time; and

monitoring the thermal element decay profile and comparing it to a library of reference thermal element decay profiles.

US Pat. No. 9,810,848

APPARATUS AND METHODS FOR USE WITH OPTICAL ROTATING JOINT

BAE SYSTEMS plc, London ...

15. A method of operating an optical rotating joint, the method comprising:
providing redundancy for camera sensor signals to be passed through the optical rotating joint coupled to a rotating structure
such that the rotating structure is arranged to rotate with respect to the optical rotating joint, the redundancy provided
by at least one of:

passing first optical signals from the optical rotating joint to a first camera sensor on the rotating structure and a second
camera sensor on the rotating structure via a first optical changeover switch on the rotating structure, wherein the first
camera sensor is optically coupled to the first optical changeover switch, and the first camera sensor is arranged to receive,
via a first optical receiver coupled to the first camera sensor, the first optical signals from the first optical changeover
switch; and

passing second optical signals from the first and second camera sensors toward the optical rotating joint via a second optical
changeover switch on the rotating structure, wherein the second camera sensor is optically coupled to the first changeover
switch, and the second camera sensor is arranged to receive, via a second optical receiver coupled to the second camera sensor,
the first optical signals from the second optical changeover switch;

such that one of the first and second camera sensors is active while another of the first and second camera sensors is not
active to provide redundancy based on optical switching.

US Pat. No. 9,738,395

LIQUID STORAGE SYSTEM

BAE SYSTEMS PLC, London ...

1. A liquid storage system comprising:
an outer tank for containing a liquid, said outer tank enclosing a liquid storage space;
an inner tank located within the outer tank and enclosing the liquid storage space; and
spacing means associated with the outer tank and the inner tank for maintaining said tanks in a spaced apart relationship;
wherein

the spacing means are deformable such that, on application of a force to the inner tank, at least part of the inner tank moves
relative to the outer tank;

the inner tank comprises:
a first portion comprising a first base wall and first side walls extending from the first base wall, the first side walls
surrounding a first opening opposite to the first base wall; and

a second portion comprising a second base wall and second side walls extending from the second base wall, the second side
walls surrounding a second opening opposite to the second base wall; and

the first portion and the second portion are coupled to the outer tank by respective deformable spacing means such that the
first and second portions may move independently from each other.

US Pat. No. 9,567,065

VEHICLE ARMREST

BAE SYSTEMS plc, London ...

1. A vehicle armrest for a forearm of an occupant of the vehicle, comprising:
a first surface facing generally upwardly towards an intended location of an occupant's forearm and positioned to support
said forearm;

a second surface facing in an opposite direction to the first surface generally downwardly away from the intended location
of the occupant's forearm, the second surface having a plurality of grooves extending from a distal end of the armrest towards
a proximal end; and

a handgrip configured to be grasped for support by an occupant of the vehicle, each groove of the second surface having a
control for operation by the occupant to control the vehicle whilst grasping the hand grip for support.

US Pat. No. 9,562,967

CONTROLLING A RADAR SYSTEM AND THE PROVISION OF A RANGE-DOPPLER TARGET IMAGE SIGNATURE

BAE SYSTEMS plc, London ...

14. A radar system comprising:
receiver apparatus arranged to receive a radar return signal and to generate a range-Doppler target image signature; and
a controller configured to:
select a spectral line within the range-Doppler target image signature from a modulation feature on the target which comprises
an effective point scatterer;

provide a range profile for the spectral line;
obtain a reference range profile of a reference point scatterer; and
determine a difference between a power at a range shorter than a peak corresponding to the modulation feature in the range
profile and a power at a corresponding range of the reference range profile.

US Pat. No. 9,118,096

WEARABLE ANTENNA HAVING A MICROSTRIP FEED LINE DISPOSED ON A FLEXIBLE FABRIC AND INCLUDING PERIODIC APERTURES IN A GROUND PLANE

BAE SYSTEMS plc, London ...

12. A wearable antenna assembly comprising an antenna feed structure, the feed structure comprising:
a flexible non-conductive fabric material; and
a microstrip transmission line having a line conductor and a ground plane, the line conductor mounted on a first side of the
flexible non-conductive fabric material and the ground plane mounted on a second side of the flexible non-conductive fabric
material that is opposite to the first side, the ground plane having a series of apertures formed therein, the apertures at
least partially overlying the line conductor;

wherein the distribution of the apertures has a periodicity along the length of the transmission line which is greater than
a carrier wavelength of signals to be carried in use of the transmission line.

US Pat. No. 9,600,010

POWER DISTRIBUTION ALGORITHM

BAE SYSTEMS plc, London ...

1. A method of distributing a resource through a network, the resource being electrical power, the network comprising a plurality
of consumer units and a plurality of provider units, each consumer unit being connected to one or more provider units in the
network, each consumer unit being a user of the resource and being associated with a resource amount, each provider unit being
a provider of the resource and being associated with a resource production limit, the method comprising:
performing one or more times a first process, the first process being a process of performing step (a) followed by step (b);
wherein

step (a) comprises selecting a previously unselected consumer unit from the plurality of consumer units, thereby providing
a currently selected consumer unit;

step (b) comprises performing one or more times a second process, the second process being a process of performing (c) followed
by step (d);

step (c) comprises selecting a previously unselected provider unit from the plurality of provider units thereby providing
a currently selected provider unit, the currently selected provider unit being connected in the network to the currently selected
consumer unit; and

step (d) comprises, from the currently selected provider unit to the currently selected consumer unit, delivering an amount
of resource, the amount of resource being substantially equal to a minimum of a first value and a second value;

the first value is the resource production limit associated with the currently selected provider unit; and
the second value is a difference between the resource amount associated with the currently selected consumer unit and a total
amount of resource previously delivered to the currently selected consumer unit.

US Pat. No. 9,507,149

IMAGE COMBINER

BAE SYSTEMS plc, London ...

1. A viewing device for viewing in reduced lighting conditions, comprising:
an image projector for generating a first image comprising image bearing light in a first range of non-infrared wavelengths;
an image combiner comprising:
a waveguide having an input diffraction grating and an output diffraction grating,
the input diffraction grating configured to receive the image bearing light in the first range of non-infrared wavelengths
from the image projector and further configured to direct the received image-bearing light along the waveguide towards the
output diffraction grating,

the output diffraction grating arranged to direct the image-bearing light in the first range of non-infrared wavelengths out
of the waveguide along a viewing direction,

the image combiner being further arranged to receive, along the viewing direction under said reduced lighting conditions,
image-bearing light of an external scene including light in a second range of infrared wavelengths, whereby the image-bearing
light of the external scene passes along the viewing direction through the waveguide and through the output diffraction grating,

the output diffraction grating being substantially transparent and insensitive to the image-bearing light passing therethrough
from the external scene in the second range of infrared wavelengths, such that the first image in the first range of non-infrared
wavelengths may appear combined with the image-bearing light of the external scene in the second range of infrared wavelengths
when viewed along the viewing direction; and

a lens arrangement having an inlet aperture for receiving the combined image bearing light of the first image and of the external
scene into the lens arrangement, an outlet for viewing the combined image-bearing light, and an image intensifier for intensifying
the combined image bearing light such that the external scene may be viewed under said reduced lighting conditions combined
with the first image.

US Pat. No. 9,490,917

DERIVED RECEIVE SIGNAL PROCESSING

BAE SYSTEMS PLC, London ...

1. A method of processing radio frequency signals, the method comprising:
in a first transceiver module, obtaining a signal indicative of a first frequency, the first frequency being a frequency of
a first signal the first signal being a transmitted signal; and

using the signal indicative of a first frequency, determining a second frequency depending on the first frequency;
tuning a filter in a second transceiver module, to the second frequency;
receiving a second signal at a receiver antenna for the second transceiver module: and
filtering, by the filter, the received second signal to:
remove, from the second signal, components having a frequency greater than the second frequency; and
remove, from the second signal, components having a frequency less than the second frequency;
wherein each of the first transceiver module and the second transceiver module comprises substantially the same type of components,
and each module is independent, wherein each module can be changed independently of the other module.

US Pat. No. 9,810,849

APPARATUS AND METHODS FOR USE WITH OPTICAL ROTATING JOINT

BAE SYSTEMS plc, London ...

16. A method of operating an optical rotating joint, the method comprising:
routing first and second optical signals through an optical rotating joint that is coupled to a rotating structure, such that
the rotating structure is arranged to rotate with respect to the optical rotating joint, by:

wavelength division multiplexing the first and second optical signals using a wavelength division multiplexer on the rotating
structure coupled to a first side of the optical routing joint;

receiving the wavelength division multiplexed first and second optical signals at a first optical circulator on the rotating
structure, the first optical circulator coupled to the first side of the optical rotating joint and directing the received
first and second optical signals through the first optical circulator to the first side of the optical rotating joint, the
first optical circulator having a first port arranged to output second and third optical signals to, and receive first optical
signals from, the first side of the optical rotating joint;

receiving, via a first optical receiver coupled to a first camera sensor, the first optical signals from a second port of
the first optical circulator, wherein the first camera sensor is on the rotating structure and is coupled to a second port
of the optical circulator;

outputting, via a first optical transmitter coupled to the first camera sensor, the second optical signals to a third port
of the first optical circulator;

outputting, via a second optical transmitter coupled to a second camera sensor, third optical signals to a third port of the
first optical circulator, wherein the second camera sensor is on the rotating structure and is coupled to the third port of
the optical circulator;

further receiving the directed first and second optical signals at a second optical circulator on a second side of the optical
rotating joint and outputting the further received first and second optical signals from the optical rotating joint to a wavelength
division demultiplexer on the second side of the optical rotating joint; and

wavelength division demultiplexing the outputted first the outputted first and second optical signals using the wavelength
division demultiplexer.

US Pat. No. 9,810,773

MITIGATION OF ANOMALOUS PROPAGATION EFFECTS IN RADAR

BAE SYSTEMS plc, London ...

1. A method of mitigating the effects of anomalous propagation in a Radar system, the method comprising:
receiving a plurality of returns from a plurality of transmit pulses;
calculating a difference in magnitude between each of the plurality of returns and its successor; and
if one of the calculated differences indicates a first step change greater than a first predetermined threshold, calculating
a first average magnitude of the returns received after the first step change, and replacing the returns received before the
first step change with synthesized returns having a magnitude equal to the first calculated average magnitude.

US Pat. No. 9,500,546

IMPACT DETECTION AND ACOUSTIC EMISSION DATA PROCESSING

BAE SYSTEMS plc, London ...

1. A method of processing measurements of an acoustic wave, the acoustic wave being within a member and caused, at least in
part, by an impact to the member, the member being made of a composite material, the method comprising:
analysing the measurements of the acoustic wave to detect an initial acoustic wave feature in the measured acoustic wave;
analysing the measurements of the acoustic wave to determine whether or not there is one or more further acoustic wave features
present in the measured acoustic wave, each of the one or more further acoustic wave features occurring in the acoustic wave
after the occurrence of the initial acoustic wave feature;

if there are no further acoustic wave features present in the measured acoustic wave, determining that the impact to the member
has not changed a structure of the member;

if there is one or more further acoustic wave features present in the measured acoustic wave, determining a value of a function
of one or more of the further acoustic wave features;

if the determined value satisfies one or more criteria, determining that the impact to the member has changed the structure
of the member; and

if the determined value does not satisfy the one or more criteria, determining that the impact to the member has not changed
the structure of the member.

US Pat. No. 9,497,233

APPLICATION OF A NON-SECURE WARNING TONE TO A PACKETISED VOICE SIGNAL

BAE SYSTEMS PLC, London ...

1. A method of applying a non-secure warning tone to a packetized voice signal, the method comprising:
receiving a voice signal comprising a sequence of voice samples;
providing a non-secure warning tone signal comprising a plurality of tone samples; and
modifying the voice signal by selecting a plurality of the voice samples and combining each selected voice sample with a respective
tone sample to form a combined sample, each combined sample comprising a weighted average of the respective voice sample and
tone sample.

US Pat. No. 9,493,244

STRUCTURAL ELEMENT OF AN AIR VEHICLE AIR INTAKE COMPOSED OF AN ARRAY OF PASSAGES WITH A HEXAGONAL CROSS SECTION

BAE SYSTEMS PLC, London ...

1. An air vehicle comprising:
a body;
a gas turbine engine disposed in said body and including an inlet face;
an inlet channel having a convoluted geometry configured such that air flow incident on the inlet face in operation will be
disordered; and

a structural element associated with the inlet channel and located entirely within a region that is downstream of a convoluted
portion of the inlet channel and upstream of the inlet face, the element being configured to modulate the air flow, at least
partially, to improve flow ordering in the incident air.

US Pat. No. 9,830,204

FACILITATING COMMUNICATION BETWEEN SOFTWARE COMPONENTS THAT USE MIDDLEWARE

BAE SYSTEMS plc, London ...

1. A computer-implemented method of facilitating communication between a first software component and a second software component,
the method including:
receiving data representing an information model of a first middleware component associated with the first software component
and a second middleware component associated with the second software component, the information model data defining logical
information to be communicated, via a middleware bridge component, between the first middleware component and the second middleware
component;

receiving data representing a middleware interface model defining classes of services between the first middleware component
and the first software component, and further defining classes of services between the second middleware component and the
second software component;

automatically generating, using the information model data independently from and exclusive of the middleware interface model
data, bridge source code for building the middleware bridge component, the bridge source code including instructions that
when executed provide communication of the logical information between the first middleware component and the second middleware
component independently of the classes of services; and

building an executable middleware bridge component using the bridge source code and further using the middleware interface
model data, the executable middleware bridge component being configured to communicate information between the first software
component and the second software component via the first and second middleware components, respectively.

US Pat. No. 9,684,170

DISPLAYS

BAE SYSTEMS plc, London ...

1. A display apparatus comprising:
an optical ocular part for viewing a scene therethrough; and
a waveguide display part arranged for guiding image-bearing light from an image generator part to a transparent display output
area of the waveguide display part such that the image-bearing light is viewable combined with light from the scene passing
through the transparent display output area,

wherein at least one of the ocular part and the waveguide display part is moveable relative to the other between a stowed
relative position and a relative position of alignment such that when in the relative position of alignment, light from the
scene viewable through the ocular part is arranged to pass through the transparent display output area and to be viewable
combined with the image-bearing light,

the display apparatus further comprising a switchable focuser part positioned in alignment with the display output area for
focusing simultaneously light from the scene viewable through the ocular part, when the waveguide display part and the ocular
part are in the relative position of alignment, combined with the image-bearing light for focused viewing by a user,

wherein the state of focus of the light from the scene after passing through the optical ocular part is consistent with the
state of focus of the image-bearing light.

US Pat. No. 9,564,868

BALUN

BAE SYSTEMS plc, London ...

1. An antenna arrangement including an antenna which is fed electrical signals from a balun for dividing an input electrical
signal to produce first and second output electrical signals which are substantially out of phase, the balun including:
an input port for receiving the input electrical signal;
an input line for coupling the input electrical signal to a slotline; and
an output line for coupling the first and second output electrical signals to, respectively, a first output port and a second
output port, the output line having a junction with the slotline;

wherein the slotline couples the input electrical signal to the junction, and the junction acts as a divider to produce the
first and second output electrical signals; and

wherein at least one of the input line, the slotline, and the output line is a tapered transmission line in which a width
of the tapered transmission line gradually increases or decreases along a length of the tapered transmission line.

US Pat. No. 9,238,332

PROTECTIVE MATERIAL ARRANGEMENT

BAE Systems plc, London ...

1. An arrangement of protective material for dissipating the kinetic energy of a moving object including one or more layers
of fibrous armour material encased within a unitary sealed encasement, in which the unitary sealed encasement is formed from
a textile armour material which is impregnated with a polymeric substance and is not sealed to the one or more layers of fibrous
armour material.

US Pat. No. 9,819,032

STANDBY ELECTRICAL ENERGY STORAGE DEVICES

BAE SYSTEMS PLC, London ...

1. A standby structural composite electrical energy storage device which can be used in place of an existing panel or element
that forms part of a structural body, the energy storage device comprising:
a first electrode structure and a second electrode structure each of said first and second electrode structures being formed
as a composite material comprising electrically conductive fibres in a respective electrode binder matrix;

a separator structure, said separator structure being formed as a composite material comprising electrically insulating fibres
in a separator binder matrix ;

a reservoir structure, said reservoir structure being formed as a composite material comprising electrically insulating fibres
in a reservoir binder matrix;

said electrode, separator, and reservoir structures being encapsulated in a composite binder matrix to form an integral, cured
fibre polymer composite wherein the separator structure separates the first and second electrode structures respectively;

at least one electrolyte void between said first and second electrode structures, said electrolyte void being capable of being
filled with an electrolyte; and

at least one reservoir comprising an electrolyte, said reservoir being at least one reservoir void in the reservoir structure,
wherein said reservoir is operably linked by a valve to said at least one electrolyte void, such that operation of said valve
allows the electrolyte void to be charged with the electrolyte.

US Pat. No. 9,639,961

IMAGE PROCESSING

BAE SYSTEMS PLC, London ...

1. A method of selecting a homography model from point correspondences from a pair of associated images, the method comprising:
partitioning at least one of the images into a plurality of partition zones;
defining a predetermined exclusion zone within the plurality of partition zones;
implementing a sampling constraint comprising: selecting a plurality of points in the image, each of the plurality of points
being selected from a respective different one of the plurality of partitioned zones such that at least one point from each
of the plurality of partitioned zones is selected; and selecting no points within the predetermined exclusion zone; and

performing a sample consensus constrained by the sampling constraint to select the homography model,
wherein the predetermined exclusion zone is defined before performing the sample consensus, and no points within the predetermined
exclusion zone are selected to perform the sample consensus to select the homography model.

US Pat. No. 9,571,608

TIMESLOT INTEROPERABILITY BETWEEN COMMUNICATING PLATFORMS

BAE SYSTEMS PLC, London ...

1. A method of assessing timeslot compatibility between a first platform and a second platform communicating over a Time Division
Multiple Access network, the method comprising:
obtaining, by a processor onboard one of the first platform and the second platform, data representing a metamodel of communication
characteristics of the first platform and the second platform, said first platform having a first base standard and said second
platform having a second base standard different than the first base standard, wherein said first and second base standards
define said communication characteristics of said first and second platform respectively, the metamodel including a first
information regarding at least transmit timeslots for transmission by the first platform, and a second information regarding
at least receive timeslots for reception by the second platform;

querying, by the processor, the metamodel to assess compatibility between the transmit timeslots and the receive timeslots,
wherein a transmit timeslot is assessed to be compatible with a receive timeslot when the transmit timeslot coincides in time
with the receive timeslot, and is assessed to be not compatible otherwise; and

outputting a timeslot compatibility map based on a result of the querying;
wherein obtaining data representing the metamodel comprises:
obtaining first and second network initiation source files for said first and second base standards respectively;
converting, when one or more of the source files is in a human-readable data catalogue format, said one or more source files
in the human readable data catalogue format into a machine processable format; and

comparing each of the first and second source files with respective schematas, extracting respective relevant data from a
first metamodel generated from the first source file and a second metamodel generated from the second source file and merging
the respective relevant data into the metamodel.

US Pat. No. 9,552,905

STRUCTURAL INTEGRATED WIRING LOOM

BAE Systems plc, London ...

1. A structural cured fibre reinforced polymer composite integrated wiring loom device comprising:
at least one conductor comprising at least one first conductive fibre ply, wherein said at least one first conductive fibre
ply comprises at least two electrical connectors;

a separator structure comprising at least one first non-conductive fibre ply, and at least one second non-conductive fibre
ply, said separator structure encapsulating said at least one conductor; and

a screen structure which encapsulates said separator structure, said screen structure comprising at least one second conductive
fibre ply and at least one third conductive fibre ply;

wherein said device comprises an impregnated cured binder matrix.

US Pat. No. 9,542,600

CLOUD FEATURE DETECTION

BAE SYSTEMS PLC, London ...

1. A method of detecting cloud features, the method comprising:
obtaining image data;
identifying regions of the image data corresponding to a below-horizon region and an above-horizon region;
classifying one or more parts of the above-horizon region as sky;
classifying, as a cloud feature, each part of the above-horizon region that has not been classified as sky;
determining an identification model specifying a visual appearance of some or all of the parts of the above-horizon region
that have been classified as a cloud feature; and

using the determined identification model, classifying, as cloud features, those regions of the of the below-horizon region
whose visual appearance is as specified by the identification model; wherein

the step of classifying one or more parts of the above-horizon region as sky comprises:
computing image gradients for Red-Green-Blue channels of the image data in directions tangential and normal to a horizon line;
smoothing, by averaging over a local circular neighborhood, the computed image gradients for the Red-Green-Blue channels;
summing the smoothed Red-Green-Blue channel image gradients to produce a combined smoothness value of each pixel in the directions
tangential and normal to the horizon line;

selecting a part of the above-horizon region in which, for each pixel in that part, the combined smoothness values of that
pixel in directions tangential and normal to the horizon line are below a predetermined threshold value; and

classifying the selected part as sky if properties of pixels within the selected part fulfil one or more predetermined criteria.

US Pat. No. 9,463,754

CAVITY ACOUSTIC TONES SUPPRESSION

BAE Systems plc, London ...

1. A cavity system, comprising:
a cavity (2) and a plurality of rods (4);

the rods (4) extending in a direction away from a base (3) of the cavity (2) to a height that extends beyond the height of a leading edge (14) of the cavity (2), the leading edge (14) being relative to an actual or intended flow direction (6) of a fluid over the cavity (2);

the rods (4) being positioned downstream of, and in the proximity of, the leading edge (14) of the cavity (2);

wherein one or more flow alteration elements (34, 38) are provided on one or more of the rods (4);

wherein at least some of the flow alteration elements (34, 38) comprise or provide additional edges at the one or more rods (4) that are in addition to the edge or edges provided by the underlying shape of the rod or rods (4); and

wherein at least some of the flow alteration elements (34, 38) comprise a channel (34) passing through the rod (4).

US Pat. No. 10,030,957

METHOD AND APPARATUS FOR CHARACTERISING FRAGMENTATION OF AN EXPLOSIVE DEVICE

BAE SYSTEMS plc, London ...

1. A method of characterising fragmentation of an explosive device, the method comprising:receiving, by a processor, an image of a witness plate that has been subject to impact by fragments from explosion of the device, the image including a plurality of pixels;
mapping, by the processor, coordinates of each pixel in the image to a location on the witness plate;
warping, by the processor, the image to remove deformations of the plate within the image to produce a warped image of the witness plate;
marking, by the processor, coordinates of each pixel representing strike damage sites in the warped image caused by impact of the fragments;
recording, by the processor, the position and area of each of the marked strike damage sites in the warped image based on the coordinates of each pixel representing the marked strike damage sites;
calculating, by the processor, at least one location of fragment impact on the witness plate from the coordinates of the pixels corresponding to the recorded position and area of each of the marked strike damage site; and
generating, by the processor, a table of results based on the at least one calculated location of fragment impact.

US Pat. No. 9,890,988

HIGH TEMPERATURE RESISTANT SHIPPING CONTAINER

BAE Systems plc, London ...

1. A high temperature resistant shipping container comprising:
an outer chamber surrounded by container walls;
an inner chamber located within the outer chamber and surrounded by inner chamber walls that divide the inner chamber from
the outer chamber, a ratio of a volume of said inner chamber to a volume of said container being between 30% and 70%;

an outer insulation layer contained within the outer chamber;
a support matrix contained within the inner chamber; and
a phase change liquid (“PCL”) saturating and supported by the support matrix within the inner chamber, the PCL and support
matrix being distributed throughout the inner chamber so that a payload stowed in the inner chamber must be contained within
an overpack so as to avoid direct exposure to the PCL,

the support matrix being configured to maintain support of the PCL as the PCL undergoes a phase change from liquid to vapor
during an exposure of the container to a temperature of 1000° F. during a duration of at least 3.5 hours.

US Pat. No. 9,784,827

FOREIGN OBJECT DEBRIS DETECTION SYSTEM AND METHOD

BAE Systems plc, (GB)

1. A method for suppressing the Jet Engine Modulation (JEM) clutter signal returns from compressor blades in data sampled
by a system for Foreign Object Debris (FOD) detection in the air intake of a turbine assembly, the method comprising the steps
of:
(a) identifying in the data, by a start-detection module comprising one or more processors, the start sample position and
length in samples of a single complete shaft rotation; and

(b) subtracting from a current rotation dataset, in a subtraction module comprising one or more processors, the samples from
a comparison rotation dataset corresponding to another complete single shaft rotation.

US Pat. No. 9,715,004

RADIO POSITIONING OF A MOBILE RECEIVER USING A VIRTUAL POSITIONING REFERENCE

BAE Systems plc, London ...

1. A guidance system for an autonomous vehicle configured to determine a position of the autonomous vehicle, said guidance
system comprising:
a primary positioning resource configured for determining a position of the autonomous vehicle as being at a first receiver
position;

a local clock;
a terrestrial receiver configured to scan for signals transmitted by terrestrial transmitters of a plurality of different
transmitter types, said plurality of different transmitter types including at least one type of transmitter that transmits
signals of opportunity that are not intended for navigational use;

a processor configured for distinguishing and identifying from among said signals a first signal transmitted by a first terrestrial
transmitter having a known location, and for analyzing said first signal to determine a distinguishable, predictably repeated
first code word and a repeat rate thereof,

said processor being further configured for establishing a first virtual positioning reference by logging the first receiver
position together with a local time measured relative to said local clock at which a first instance of the first code word
is received by the autonomous vehicle;

a differential positioning unit configured for using an output of the local clock to determine a time difference between when
the first virtual positioning reference is predicted to receive a second instance of the first code word and when the autonomous
vehicle actually receives the second instance of the first code word when at a second receiver position, thereby determining
radio positioning information pertaining to the second receiver position of the autonomous vehicle; and

a guidance controller configured to direct movements of the autonomous vehicle according to guidance information that includes
said radio positioning information.

US Pat. No. 9,478,141

IDENTIFICATION AND ANALYSIS OF AIRCRAFT LANDING SITES

BAE SYSTEMS plc, London ...

1. A method of identifying and analysing an aircraft landing site during flight, the method including using a camera to capture
in-flight images of the ground in the region of a possible landing site, using a database of computer modelled images of possible
aircraft landing sites mapped to a global co-ordinate reference frame to compare the in-flight images with a modelled image
of the possible landing site and optimising correspondence therebetween to obtain an in-flight image optimally mapped to the
global co-ordinate reference frame, and analysing a landing site corresponding to the optimally mapped in-flight image to
ascertain the presence of any obstructions thereon.

US Pat. No. 10,086,942

AIRCRAFT STORES TRANSPORT SYSTEM

BAE SYSTEMS PLC, London ...

1. A system comprising:a low observable aircraft having its edges oriented at a limited number of directions designed in accordance with planform alignment;
a device mounted to the aircraft outside external surfaces of the aircraft; and
a fairing located outside the external surfaces of the aircraft, the fairing being releasably coupled to the one or more external surfaces of the aircraft, at least part of the fairing being spaced apart from one or more of the external surfaces of the aircraft so as to define a chamber between the fairing and the one or more external surfaces of the aircraft; wherein
the device is wholly located within the chamber; and
the fairing is configured such that one or more interfaces between the fairing and the aircraft are substantially conformal and are oriented in the same direction as at least one edge of the aircraft in accordance with the principals of planform alignment.

US Pat. No. 9,831,045

STRUCTURAL SUPERCAPACITOR USABLE IN A MECHANICAL STRUCTURE

BAE SYSTEMS PLC, London ...

1. A component comprising a structural supercapacitor included in said component, the structural supercapacitor including:
a first electrode structure;
a second electrode structure; and
a separator structure;
said separator structure being formed from a composite material comprising a glass fibre ply in a cured electrically insulating
separator binder matrix;

said separator structure separating the first electrode structure from the second electrode structure;
said separator structure further comprising at least one void which comprises a fluidic electrolyte;
each of the first electrode structure and the second electrode structure comprising at least one ply of conductive composite
material which includes electrically conductive fibres in a cured, electrically insulating electrode binder matrix; and

the supercapacitor being structurally inseparable from a remainder of the component.

US Pat. No. 9,745,076

TUBULAR BAFFLE SYSTEM

BAE Systems plc, London ...

1. An aircraft fuel tank and baffle system comprising:
an aircraft wing fuel tank located in an aircraft wing, said fuel tank enclosing a fuel storage space; and
one or more baffles located within the fuel storage space, wherein each baffle is a tubular member through which a liquid
may flow; the one or more baffles are aligned along a length of the aircraft wing; each baffle comprises:

a first tubular portion providing a tubular outer wall; and
a second tubular portion located within the first tubular portion and providing a tubular inner wall;
for each baffle, the first and second tubular portions of that baffle are substantially parallel;
for each baffle, the first and second tubular portions of that baffle are spaced apart to define a chamber therebetween; and
each baffle further comprises radial side walls between its first and second tubular portions such that the chamber of that
baffle is a sealed chamber.

US Pat. No. 9,733,090

ROUTE PLANNING

BAE SYSTEMS plc, London ...

15. One or more non-transitory machine readable mediums encoded with instructions that when executed by one or more processors
cause a process to be carried out for determining a route for a vehicle, the process comprising:
receiving, from a measurement apparatus, a position of the vehicle;
receiving a specification of a region into which the vehicle is to be moved; and
using the measurements and the specification of the region, performing a route determination routine to determine the route
for the vehicle, wherein the route determination routine includes:

constructing a graph within a state space of the vehicle, the graph comprising a plurality of vertices and one or more edges
connecting those vertices;

identifying, within the constructed graph, a path from a first vertex of the graph to a second vertex of the graph, the first
vertex corresponding to the measured position of the vehicle, and the second vertex corresponding to the vehicle being at
least partially located within the region;

using the identified path, performing a path shortening algorithm so as to provide a shortened path; and
determining the vehicle route specified by the shortened path, thereby providing the route for the vehicle; and the path shortening
algorithm comprises:

defining the identified path to be the current path; and
performing one or more times steps (i) to (vi), so as to produce the shortened path; wherein
step (i) comprises selecting a vertex along the current path so as to provide a first path vertex;
step (ii) comprises selecting a further vertex along the current path so as to provide a second path vertex, the second path
vertex being connected to the first path vertex by at least two edges;

step (iii) comprises determining a first cost value, the first cost value being indicative of a cost associated with a path
within the current path from the first path vertex to the second path vertex;

step (iv) comprises providing an additional edge, the additional edge having as its starting vertex the first path vertex
and as its ending vertex the second path vertex;

step (v) comprises determining a second cost value, the second cost value being indicative of a cost associated with a path
from the first path vertex to the second path vertex along the additional edge; and

step (vi) depending on the first and second cost values, either:
disregarding the additional edge and maintaining the current path; or
modifying the current path by removing, from the current path, the edges and vertices in the current path by which the first
path vertex and the second path vertex are connected, and including, in the current path, the additional edge.

US Pat. No. 9,658,639

INCEPTOR APPARATUS

BAE SYSTEMS plc, London ...

1. An inceptor apparatus for operating a machine and having multiple modes of operation, the operation of the machine providing
an output from at least one inertial sensor, the apparatus comprising:
a stick member having a base portion, and a grip portion extending from the base portion in only one direction;
at least one sensor for generating actual stick member position data; and
a control unit configured to receive an inertial force signal from the at least one inertial sensor and the actual stick member
position data, the control unit being operable in all modes of operation to generate a first stick member position compensation
signal in dependence upon the inertial force signal and actual stick member position data, the modes of operation including
an active mode to counter inertial force acting on the grip portion using one or more actuators, and a passive mode to compensate
inertial force acting on the grip portion even if the stick member is not acted upon by the one or more actuators to counter
inertial forces.

US Pat. No. 9,640,747

THERMOELECTRIC DEVICE

BAE SYSTEMS PLC, London ...

1. A structural body having a thermoelectric device incorporated therein, the structural body comprising:
a structural body having a structural configuration enabling it to replace a non-thermoelectric structural body in a vehicle,
vessel, craft, or building; and

a thermoelectric device incorporated into the structural body, the thermoelectric device including:
a first conductor layer;
a second conductor layer;
a thermocouple layer located between the first and second conductor layers, said thermocouple layer including a structural
support having an internal surface that is coated by at least one layer of at least one conducting polymer; and

a carbon fibre skin applied on the first and second conductor layers, so as to encapsulate the device and thereby provide
a fibre reinforced polymer composite structure,

said first and second conductor layers being included in said structural body in locations that result in a temperature differential
being applied between said first and second conductor layers when said structural body is incorporated in said vehicle, vessel,
craft, or building.

US Pat. No. 9,664,824

DISPLAY COMPRISING AN OPTICAL WAVEGUIDE AND SWITCHABLE DIFFRACTION GRATINGS AND METHOD OF PRODUCING THE SAME

BAE SYSTEMS plc, London ...

1. An apparatus for producing an optical display comprising:
an optical waveguide;
a first switchable diffractive part arranged adjacent to an external front surface of an input portion of said optical waveguide,
said first switchable diffractive part switchable between a diffractive state for diffracting light of a first wavelength
and a non-diffractive state, and arranged to receive light and selectively to diffract the light into said optical waveguide;

a second diffractive part formed on an external rear surface of said input portion of said optical waveguide, said second
diffractive part arranged to receive from the first switchable diffractive part diffracted light of said first wavelength
and non-diffracted light of a second wavelength other than the first wavelength and to diffract said light of either wavelength
to a common angle for guided propagation along the optical waveguide;

a third diffractive part formed on said external rear surface of an output portion of said optical waveguide, said third diffractive
part optically coupled to the second diffractive part via total internal reflection along the optical waveguide and arranged
to receive and to diffract light of said first wavelength from the second diffractive part to a first angle for output from
the optical waveguide and to receive and to diffract light of said second wavelength from the second diffractive part to a
second angle for output from the optical waveguide; and

a fourth switchable diffractive part arranged adjacent to said external front surface of said output portion of said optical
waveguide, said fourth switchable diffractive part switchable between a diffractive state for diffracting light of the first
wavelength and a non-diffractive state, and arranged to receive and selectively to diffract said light from the third diffractive
part into a common angle such that light of the first and second wavelengths occupy the same field of view.

US Pat. No. 9,556,983

ALIGNMENT DEVICE, AND METHOD OF ALIGNMENT USING AN ALIGNMENT DEVICE

BAE SYSTEMS plc, London ...

1. A method of joining together two pipes using a mechanical joining device, the method comprising:
moveably locating the mechanical joining device on one of the pipes;
bringing the pipes into position for joining together;
attaching an alignment device to the pipes at a joint between the pipes, the alignment device configured to receive, in a
generally aligned configuration, the two pipes; the alignment device being further configured such that, in use, a joining
line between the two pipes is visible for checking alignment, and such that, in use, each pipe can be marked at a predetermined
distance from the joining line;

checking alignment of the pipes, and if necessary adjusting the position of one or more of the pipes until the correct alignment
is achieved;

marking the correct position of the mechanical joining device on the pipes, using the alignment device;
removing the alignment device from the pipes, and sliding the mechanical joining device to the position marked on the pipes;
and

fastening the mechanical joining device to join the pipes together.

US Pat. No. 9,555,475

ADDITIVE LAYER MANUFACTURING

BAE SYSTEMS plc, London ...

1. An additive layer manufacturing apparatus for forming a metallic component, the apparatus including:
a mount comprising one or more clamps configured to mount a work piece to the apparatus;
a heat source movable relative to the work piece and configured to apply heat to a portion of a surface of the work piece
sufficient to melt said portion;

a material delivery system configured to add metallic material to the melted portion whereby progressively to form a layer
of metallic material on the work piece;

a stress measuring system forming part of the one or more clamps and configured to measure stresses tending to distort the
work piece; and

a stress relieving system configured to apply a force to the work piece so as to relieve stress in the work piece while mounted
to the apparatus whereby to reduce distortion of the work piece during forming of the component.

US Pat. No. 9,523,609

SPECTRAL IMAGING

BAE SYSTEMS plc, London ...

1. A spectral imaging apparatus for processing electromagnetic (EM) radiation, the EM radiation originating from a target
scene and comprising a wide range of frequencies, the apparatus comprising:
a dispersive element for receiving EM radiation from the target scene and promoting differing amounts of dispersion depending
on the frequency of the EM radiation, the dispersive element including:

a First Switchable lensing device (FSLD) which in a first state allows EM radiation to pass substantially unaffected and which
in a second state collimates the received EM radiation, wherein the FSLD is arranged to receive light from the target scene;
and

a Second Switchable Lensing Device (SSLD) which in a first state disperses received EM radiation and in a second state allows
EM radiation to pass unmanipulated, the SSLD being arranged to receive light from the FSLD, and including:

a diffractive lens having a first refractive index and comprising surface relief elements; and
a liquid crystal element, complimentary to the diffractive lens and operable in the first state of the SSLD to have a refractive
index different to the first refractive index and in the second state of the SSLD to have a refractive index substantially
matching the first refractive index;

wherein the FSLD and the SSLD may both be placed in their first states to effect the dispersive condition of the dispersive
element, or may both be placed in their second states to effect the non-dispersive condition of the dispersive element;

a deformable lens arranged to receive EM radiation from the dispersive element; and
an imaging sensor for detecting EM radiation across the wide range of frequencies, and arranged to receive EM radiation from
the deformable lens;

wherein the deformable lens is operable to adopt any one of a plurality of focal conditions, each focal condition tending
to focus a different range of the EM radiation at the imaging sensor, each focal condition thereby defining a component band
for the EM radiation.

US Pat. No. 10,030,953

ILLUMINATION MUNITION

BAE SYSTEMS plc, London ...

1. An illumination munition comprising a shearable tail unit, a main body which comprises a payload cavity for receiving an illumination payload apparatus, a fuze, an ogive element located between said main body and the fuze, and an explosive train operably connected to said fuze, wherein the illumination payload apparatus comprises an illumination composition, a drogue parachute and a main parachute, wherein the main parachute is tethered by a tether arrangement to the illumination payload apparatus, such that after deployment of said main parachute only the illumination payload apparatus descends under the control of said main parachute.

US Pat. No. 9,923,220

ELECTRICITY GENERATION

BAE SYSTEMS plc, London ...

1. An apparatus for electricity generation, comprising:
a plasma container containing a plasma, the plasma including a radioactive gas, the plasma sustained by radioactive decay
of the radioactive gas;

an inlet of the plasma container through which, in use of the apparatus, water will be introduced to the plasma container;
an outlet of the plasma container through which, in use of the apparatus, material containing hydrogen and oxygen resulting
from dissociation of water molecules by interactions between radicals in the plasma and the water will be exhausted from the
plasma container;

a separator for separating hydrogen from material exhausted from the plasma container, the separator being coupled to the
outlet, the separator also being coupled to the inlet, and the outlet being coupled to the inlet via the separator so that
any exhaust gases that remain after the hydrogen is separated can be recirculated into the inlet of the plasma container;
and

a generator operable to generate electricity using the hydrogen as a fuel.

US Pat. No. 9,855,681

FERRITE COMPOSITIONS

BAE SYSTEMS plc, London ...

1. A ferrite composite structure comprising:
at least one fibre ply including a magnetic ferrite composition disposed therein, said composition comprising a resin and
a plurality of ferrite particulates, wherein said ferrite particulates are dispersed within said resin and have an average
longest dimension of less than 500 nm, and said fibre ply is substantially encapsulated in a binder matrix to form a fibre
reinforced polymer composite, in which said binder matrix is in contact with said fibre ply.

US Pat. No. 9,846,318

CONTROLLING BIAS VOLTAGES FOR OPTICAL MODULATORS

BAE SYSTEMS plc, London ...

1. A method of controlling an optical modulator, the optical modulator being configurable to be biased by application of a
bias voltage such that the optical modulator operates at quadrature, the method comprising:
providing a target for an output power of the optical modulator, the target for the output power being an output power corresponding
to the optical modulator operating at quadrature;

applying, to the optical modulator, a bias voltage that biases the optical modulator so that the output power of the optical
modulator is within a pre-defined bias voltage range of the target for the output power;

detecting that an optical input to the optical modulator has been disabled;
determining a first length of time, the first length of time being a length of time that, prior to the optical input to the
optical modulator being disabled, the output power of the optical modulator was within the pre-defined bias voltage range;
and

maintaining the bias voltage at its current level for a second length of time, the second length of time being dependent upon
the first length of time.

US Pat. No. 9,671,259

CONDUIT

BAE Systems plc, London ...

1. A conduit comprising:
a conduit wall defining a flow channel through which a fluid may flow; and a plurality of further channels, each of the further
channels being formed within the conduit wall; wherein
each further channel comprises a first end and a second end opposite to the first end;for each further channel, the first end of that further channel comprises an opening in fluid communication with the flow
channel of the conduit;the first ends of the further channels are spaced apart along a length of the conduit;the second ends of the further channels are located proximate to one another such that the distance between the second ends
of any two further channels is smaller than the distance between the first ends of those two further channels, andthe conduit having been produced using an Additive Manufacturing process.

US Pat. No. 9,568,587

TRACKING ALGORITHM

BAE SYSTEMS plc, London ...

1. A method of tracking an entity by monitoring at least one parameter of a signal, the signal tending to vary spatially and
be generally time-invariant, the entity moving from a first location within an area to a second location within the area,
the method being suitable for use when the location of the source of the signal is unknown, the method comprising:
providing a plurality of particles for use with a particle filter, each particle being associated with a respective first
particle location, each respective first particle location being an estimate of the first location of the entity;

providing an estimate of the motion of the entity between the first location and the second location based on signals from
a motion measurement device;

using the estimate of the motion and using the particle filter, updating each particle thereby producing an updated respective
particle location, each updated respective particle location being an estimate of the second location of the entity;

for each updated particle, estimating at least one expected signal parameter at the updated respective particle location;
measuring a signal parameter at the second location of the entity;
assigning a weight to each updated particle depending on the expected signal parameter estimated for that particle and the
measured signal parameter;

estimating the second location of the entity by determining a function of the weighted updated particles; and
inputting the estimated location and measured signal parameter, as a location/parameter data set, to a database.

US Pat. No. 9,567,080

GOAL-BASED PLANNING SYSTEM

BAE SYSTEMS plc, London ...

1. A method of determining actions to be performed by one or more physical entities such that a predetermined goal is accomplished
and such that one or more predetermined constraints are satisfied, the method comprising:
using a specification of the goal, determining, by a plan determination module, an initial plan, the initial plan comprising
one or more actions, each of the one or more actions being assigned to an entity, the one or more actions being such that,
if each entity performed the one or more actions assigned to that entity, the goal would be accomplished;

using a specification of the one or more constraints, determining, by a plan analysis module, that one or more of the constraints
would not be satisfied if the initial plan were implemented; and

iteratively performing steps (i) to (v) until, at step (v), it is determined that each of the one or more predetermined constraints
is satisfied, thereby providing a final plan that specifies actions to be performed by the one or more entities such that
the predetermined goal is accomplished and such that the one or more predetermined constraints are satisfied; wherein

step (i) comprises identifying: a part of the current plan in which a constraint is not satisfied; and a constraint that is
not satisfied in the identified part of the current plan;

step (ii) comprises determining, by a remedy determination module, a remedial action or a remedial constraint, the remedial
action or remedial constraint being such that, if the remedial action or remedial constraint were to be implemented, the identified
constraint would be satisfied in the identified part of the current plan;

step (iii) comprises updating the current specification of the goal so as to include a specification for the determined remedial
action or remedial constraint, thereby providing an updated specification of the goal;

step (iv) comprises, using the updated specification of the goal, determining, by the plan determination module, a further
plan, the further plan comprising one or more further actions, each of the one or more further actions being assigned to an
entity, the one or more further actions being such that, if each entity performed the one or more further actions assigned
to that entity, the goal would be accomplished; and

step (v) comprises, using the specification of the one or more constraints, determining, by the plan analysis module, whether
or not each of the one or more constraints would be satisfied if the further plan were to be performed.

US Pat. No. 9,571,733

IMAGE CAPTURING

BAE SYSTEMS PLC, London ...

1. A method of capturing and processing images of an area of terrain, the method comprising:
for each of a plurality of time-steps within a time period, using each of a plurality of modular cameras in a camera array,
simultaneously generating an image Of a respective portion of terrain, wherein the modular cameras in the camera array have
substantially fixed positions relative to each other, and the portions of terrain are such that a whole of an area of terrain
has been imaged by an end of the time period;

processing all images from the modular cameras to identify an object of interest in those images;
from each image in which the object of interest has been identified, extracting a sub-image containing that object of interest
that has not previously been stored;

selecting a subset of all images, the subset images being the minimum number of images that provides that the whole area of
the terrain is covered by the portions of the terrain in the subset images alone;

whereby the whole area of the terrain is oversampled, having intermediate images generated between the subset images; and
wherein all images equals the subset images plus the intermediate images.

US Pat. No. 9,419,898

NETWORK MANAGEMENT ASSEMBLY FOR MANAGING A FLOW OF NETWORK MANAGEMENT TRAFFIC

BAE SYSTEMS PLC, London ...

1. A network management assembly for managing a flow of network management traffic across a network having a plurality of
discrete network domains, the assembly comprising:
a first management terminal which is configured to transmit network management traffic relating to a configuration of assets
from the first management terminal to a respective domain to each of the network domains via respective links in a first group
of communication links; and

a second management terminal which is configured to receive network management traffic relating to a status of assets from
each of the network domains via respective links in a second group of communication links;

each of the links in the first group of communication links being configured to permit a flow of network management traffic
from the first management terminal to a respective one of the network domains and to prevent a flow of network management
traffic from the respective one of the network domains to the first management terminal,

each of the links in the second group of communication links being configured to permit a flow of network management traffic
from a respective one of the network domains to the second management terminal and prevent a flow of network management traffic
from the second management terminal to the respective one of the network domains;

wherein each of the links in the first group of communication links is configured to pass management traffic relating to a
configuration of assets from the first management terminal to a respective domain; and

wherein each of the links in the second group of communication links is configured to pass management traffic relating to
a status of assets from a respective domain to the second management terminal.

US Pat. No. 9,881,356

DATA PROCESSING METHOD

BAE Systems plc, London ...

1. A data processing method for processing hyperspectral image data of a scene, the method comprising:
a) sequentially receiving portions of the data at a data buffer to form a data set comprising a predefined number of data
portions;

b) calculating a set of global statistical parameters and data correction factors using the data forming the data set;
c) receiving a further data portion at the data buffer and simultaneously removing the earliest received data portion at the
data buffer, from the data set,

d) calculating a set of local statistical parameters using the data of the further data portion;
e) updating the set of global statistical parameters using the set of local statistical parameters;
f) correcting the data of the data portion removed from the data set using the correction factors; and
g) outputting the corrected data portion and set of global statistical parameters calculated using the data set comprising
the removed data portion, to a processor.

US Pat. No. 9,865,880

COMPONENT INCLUDING A RECHARGEABLE BATTERY

BAE SYSTEMS PLC, London ...

1. A substantially rigid structural component comprising:
a rechargeable, rigid, structural battery using one of an alkaline and acid based chemistry, the battery having a rigid anode
structure, a rigid cathode structure and a rigid separator structure which separates the anode structure from the cathode
structure and contains an electrolyte, wherein:

the anode structure and the cathode structure are each formed from a composite material which includes electrically conductive
fibres and electrochemically active material in a cured binder matrix, and the separator structure is formed from a composite
material which includes electrically insulating fibres in the cured binder matrix, so that the anode, cathode and separator
provide a monolithic structure;

the battery is structurally inseparable from a remainder of the substantially rigid structural component; and
the binder matrix contains in a range of from 0.05% to 50% w/w of an elastomer binder.

US Pat. No. 9,860,646

TRANSDUCER FOR ACOUSTIC COMMUNICATIONS

BAE Systems plc, London ...

1. A transducer for acoustic communications, the transducer comprising:
a signal processor configured to implement a communications scheme at and around a centre frequency of at least 1 MHz;
a piezoelectric element for activation in accord with the communications scheme;
an electrode electrically connected to the signal processor, and having a first surface that runs along and is attached to
a second surface of the piezoelectric element; and

a substrate, having the piezoelectric element mounted on the substrate;
wherein a length of the first surface of the electrode that runs along the second surface of the piezoelectric element is
approximately equal to the acoustic wavelength of an acoustic wave in the substrate at the centre frequency, the transducer
being adapted for acoustic communications through a series arrangement of fluid and solid media.

US Pat. No. 9,748,306

RADIATION DETECTORS, AND METHODS OF MANUFACTURE OF RADIATION DETECTORS

BAE SYSTEMS plc, London ...

1. A method of manufacturing a radiation detector comprising:
(i) providing a layer of a first material on a substrate;
(ii) selectively removing the first material from parts of the layer; and
(iii) filling the removed parts of the layer with a second material;
wherein one of the first or the second material comprises germanium, and wherein (ii) and (iii) in combination result in an
array of elongate nanostructures, and

wherein selectively removing the first material comprises:
applying a mask material to define the material to be removed from the layer;
anisotropically removing material from the layer using a first plasma etching process during which a passivating material
is formed on side walls of features being etched; and

subsequent to the first etching process, using a second plasma etching process to deepen the features created by the first
etching process, the second etching process including use of an etchant species to anisotropically remove further material
from the features etched by the first etching process;

wherein the etchant species responsible for the removal of material from the features during the second etching process is
collimated by those parts of the features formed by the first etching process, such that no further passivation is required
during the second etching process.

US Pat. No. 9,721,211

SYSTEM AND METHOD FOR SENSOR DATA PROCESSING TO DETERMINE POSITION OF A VEHICLE

BAE SYSTEMS plc, London ...

1. A method of processing data, the method comprising:
pre-processing, by a first computer processor, first data received at a first system input to generate first pre-processed
data, wherein the first computer processor is coupled to a data fusion computer processor, and wherein the first computer
processor is coupled to the first system input and configured to pre-process a first type of data received from a first data
source at the first system input;

pre-processing, by a second computer processor, second data received at a second system input to generate second pre-processed
data, wherein the second computer processor is coupled to the data fusion computer processor, and wherein the second computer
processor is coupled to the second system input and configured to pre-process a second type of data received from a second
data source coupled to the second system input;

wherein the first data received at the first system input is from the first data source and includes a first plurality of
data points and the second data received at the second system input is from the second data source and includes a second plurality
of data points, the second data source being different from the first data source;

performing, by the data fusion computer processor, a kernel function on the first pre-processed data and the second pre-processed
data to provide kernelised data; and

applying a regression technique to the kernelised data to identify a data source providing data associated with a higher significance
of relevant features between the first data source and the second data source; and

using the identified data source to determine a position of a vehicle proximate the first data source and the second data
source.

US Pat. No. 9,618,750

HEAD MOUNTED DISPLAY

BAE SYSTEMS PLC, London ...

1. A head-mounted or helmet-mounted display apparatus comprising:
an optical element which in use is disposed in front of the eyes of a user, the optical element comprises a waveguide portion,
the waveguide portion which in use is also disposed in front of the eyes of the user;

a first moveable light source and a second moveable light source of image-bearing light, the first moveable light source and
the second moveable light source being configured to move about an axis of symmetry of the optical element;

an input element configured to input the image-bearing light to the waveguide portion; and
a first diffraction means for propagation of image-bearing light of the first light source through the waveguide portion,
the first diffraction means being arranged to release the image bearing light from the waveguide portion, the waveguide portion
having optical powers such that the released light provides a first visible image to one of the user's eyes,

a second diffraction means for propagation of image-bearing light of the second light source through the waveguide portion,
the second diffraction means being arranged to release the image bearing light from the waveguide portion, the waveguide portion
having optical powers such that the released light provides a second visible image to the other of the user's eyes, the waveguide
portion including the first diffraction means and the second diffraction means,

the first moveable light source and the second moveable light source being disposed such that relative angular movement of
the first light source and the second light source about the axis of symmetry of the optical element adjusts the inter-pupillary
spacing of the first visible image and the second visible image presented to a respective eye of a user.

US Pat. No. 9,528,821

HIGH SPEED MAGNETIC OSCILLATING DEVICE

BAE Systems plc, London ...

1. An apparatus for scanning a product being manufactured in a continuous linear process comprising:
two voltage generators for providing output frequencies of equal magnitude but of opposing phase;
a magnetic foil with a mirrored face mounted for oscillation about a torsion axis, wherein the foil is magnetized to provide
regions of opposite polarity thereon, respectively to each side of said torsion axis;

an induction coil operatively associated with each of said voltage generators, each coil generating a magnetic force of alternating
positive and negative polarity under the influence of said opposed phase output frequencies of the voltage generators, interacting
respectively with said regions of opposite polarity thereby to provide a main magnetic driving force acting on one of said
regions to oscillate the foil about the torsion axis and an opposing magnetic force acting on the other one of said regions
to stabilize said oscillation and control an angular extent thereof;

a light source for projecting a ray of light onto the mirrored face of the magnetic foil as the foil oscillates, thereby directing
successive curtains of parallel rays across a product proceeding in a linear path of travel, wherein said successive curtains
of parallel rays scan the product at the frequency of the generators; and

an optical analysis device configured to analyze the format of the resulting light rays after their passage across the product,
wherein such analysis provides dimensional measurements and verifies the product's surface integrity.

US Pat. No. 9,946,068

OPTICAL WAVEGUIDE AND DISPLAY DEVICE

BAE SYSTEMS plc, London ...

1. An optical structure for receiving light over a field of view, the light bearing first, second and third primary color component images, the optical structure comprisinga first waveguide, comprising:
a first input diffraction grating for receiving the light bearing each of the first, second and third primary color component images, configured to diffract at least some of the light bearing each said primary color component image, received over a respective first portion of the field of view, into the first waveguide to propagate along the first waveguide by total internal reflection and to transmit out of the first waveguide at least some of the light bearing each said primary color component image that is not diffracted into the first waveguide; and
a first image expansion arrangement comprising at least one expansion grating for expanding the light propagating along the first waveguide and to output at least a portion of the diffracted expanded propagating light out of the first waveguide, and
a second waveguide, comprising:
a second input diffraction grating for receiving the undiffracted light transmitted out of the first waveguide by the first input diffraction grating of the first waveguide, configured to diffract at least some of the transmitted light bearing each said primary color component image, received over a respective second portion of the field of view, into the second waveguide to propagate along the second waveguide by total internal reflection, wherein each second portion of the field of view for each said primary color component image is different to the respective first portion and comprises at least that portion of the field of view excluding the respective first portion of the field of view for the primary color component image; and
a second image expansion arrangement comprising at least one expansion grating for expanding the light propagating along the second waveguide, to combine at least a portion of the expanded light propagating along the second waveguide with the diffracted expanded light output by the first waveguide and to output the combined diffracted expanded light from the second waveguide;
wherein each of the first and second input diffraction gratings comprise a periodic diffraction grating having a different respective pitch.

US Pat. No. 9,865,921

DIRECTIONAL MULTI-BAND ANTENNA

BAE SYSTEMS plc, London ...

1. A directional multi-band antenna comprising:
a primary reflector;
at least one secondary reflector;
a multi-layer dielectric layer selectively reflective or transmissive of incident radiation according to wavelength, the multi-layer
dielectric layer being provided at a surface of either the primary or the secondary reflector;

an RF unit comprising a collocated sensor and transmitter, the RF unit positioned on a first side of the secondary reflector;
and

an optical unit comprising a collocated sensor and transmitter, the optical unit positioned on the first side of the secondary
reflector;

wherein:
the primary reflector is for passing signals between the secondary reflector and the environment;
the secondary reflector is for reflecting RF signals from the primary reflector to the RF unit and from the RF unit to the
primary reflector, and for reflecting optical signals from the primary reflector to the optical unit and from the optical
unit to the primary reflector; and

the antenna is operable to transmit or receive, RF or Optical signals, along a common beam axis;
wherein the secondary reflector is operable to reflect both the RF signals received from the primary reflector and the optical
signals received from the primary reflector along the common beam axis in a same direction away from the secondary reflector.

US Pat. No. 9,742,197

POWER DISTRIBUTION ALGORITHM

BAE SYSTEMS plc, London ...

1. A method of distributing a resource through a network, the resource being electrical power, the network comprising a plurality
of consumer units and a plurality of provider units, each consumer unit being connected to one or more provider units in the
network, each consumer unit being a user of the resource and being associated with a desired resource amount of the resource,
each provider unit being a provider of the resource and being associated with a resource production capacity of the resource,
the method comprising:
for each provider unit, allocating a portion of the resource production capacity of that provider unit to each of the consumer
units to which that provider unit is connected, thereby providing a current production allocation for each provider unit;

performing one or more times steps (a) to (c), wherein
step (a) comprises, for each consumer unit, generating a vector comprising one or more resource requests, thereby providing
a current vector for each consumer unit, each resource request being a request for an amount of the resource to be delivered
to that consumer unit from a provider unit connected to that consumer unit from among the plurality of provider units, and
each resource request being dependent on the current production allocation of that provider unit;

step (b) comprises, for each provider unit, determining whether the current production allocation of that provider unit satisfies
the resource requests made of that provider unit in each of the current vectors; and

step (c) comprises, for each provider unit for which it is determined that the current production allocation does not satisfy
the resource requests made of that provider unit in each of the current vectors, updating the current production allocation
for that provider unit; and

from each provider unit and dependent on the current production allocation of that provider unit, delivering an amount of
the resource to a consumer unit connected to that provider unit from among the plurality of consumer units, wherein

the step of, for each consumer unit, generating the vector comprising the one or more resource requests comprises, one or
more times, performing steps (d) to (e),

step (d) comprises selecting a previously unselected provider unit that is connected to that consumer unit from among the
plurality of provider units, thereby providing a currently selected provider unit,

step (e) comprises, generating a resource request of the one or more resource requests, the generated resource request being
a request for an amount of the resource to be delivered to that consumer unit from the currently selected provider unit,

the amount of the resource requested in the generated resource request of step (e) is substantially equal to a minimum of
a first value and a second value,

the first value is the resource production capacity of the currently selected provider unit that is allocated to that consumer
unit, and

the second value is a difference between the desired resource amount associated with that consumer unit and a total amount
of the resource requested in all other of the resource requests in the current vector provided for that consumer unit.

US Pat. No. 9,708,076

LIGHTNING PROTECTION SYSTEM

BAE Systems plc, London ...

1. A system comprising:
a low observable aircraft (2) having its surfaces oriented at a limited number of directions according to a principle of planform alignment; and

a lightning diverter strip (4, 22, 30) comprising a plurality of electrically conductive elements (8, 24, 32) arranged in a spaced apart relation, each of the electrically conductive elements (8, 24, 32) comprising an elongate portion; wherein

the lightning diverter strip (4, 22, 30) is attached to the aircraft in such a way that the conductive elements (8, 24, 32) are located on an exposed outer surface of the lightning diverter strip (4, 22, 30) and exposed to atmospheric conditions; and

for each conductive element (8, 24, 32), a long axis of the elongate portion of that conductive element (8, 24, 32) is substantially aligned with one of the directions.

US Pat. No. 9,702,630

HEAT EXCHANGER

BAE Systems plc, London ...

1. A heat exchanger (2) comprising:
an outer cylindrical portion (4) comprising a duct through which a first fluid may flow; and

one or more anti-swirl vanes (18) disposed within the duct and configured to disrupt the flow of the first fluid through the duct; wherein

each vane (18) comprises:

one or more first flow channels (22), the one or more first flow channels (22) being in fluid communication with the duct such that the first fluid flowing through the duct may flow through the one or
more first flow channels (22); and

one or more second flow channels (24) through which a second fluid may flow so as to transfer heat between the first fluid and the second fluid;

the one or more second flow channels (24) are separated from the duct and the one or more first flow channels (22) by at least one channel wall, respectively, such that fluid cannot flow between the duct and the one or more second flow
channels or between the one or more first flow channels and the one or more second flow channels (24).

US Pat. No. 9,696,160

ROUTE PLANNING

BAE SYSTEMS plc, London ...

1. A method of determining routes for at least two vehicles, the method comprising:
receiving, by a radar system, a first radar signal reflected from a first autonomous vehicle;
receiving, by the radar system, a second radar signal reflected from a second autonomous vehicle;
measuring, by the radar system, a position of the first autonomous vehicle using the first radar signal;
measuring, by the radar system, a position of the second autonomous vehicle using the second radar signal;
providing, for use by one or more processors, a specification of a region, the region having a fixed position in relation
to the first autonomous vehicle;

using the position of the first autonomous vehicle and the position of the second autonomous vehicle and the specification
of the region, performing, by the one or more processors, a route determination process to determine a first route for the
first autonomous vehicle and a second route for the second autonomous vehicle, wherein performing the route determination
process includes:

constructing a graph within a joint state space of the vehicles, the graph comprising a plurality of vertices and one or more
edges connecting those vertices;

identifying, within the constructed graph, a path from a first vertex of the graph to a second vertex of the graph, the first
vertex corresponding to the measured positions of the vehicles, and the second vertex corresponding to the second vehicle
being at least partially located within the region; and

using the identified path, determining routes for the vehicles, thereby providing the first and second routes.

US Pat. No. 9,514,361

CLASSIFICATION OF RANGE PROFILES

BAE SYSTEMS plc, London ...

1. A method for classifying range profiles, comprising:
gathering non-sensor based sources of information giving structural details of objects of interest;
selecting, from the non-sensor based sources of information, features of the objects of interest that are configured to appear
most prominent as peaks of backscatter in a sensor based observation of the objects of interest;

generating, for each of the objects of interest, a probabilistic model representing, for one or more different orientations
of the respective object of interest, possible sequences of distances between the features of the respective object of interest
selected from the non-sensor based sources of information that are configured to appear as distinct peaks of backscatter in
sensor based range data for the object, wherein the possible sequences of distances are derived from a first probabilistic
representation of each of the features of the respective object of interest;

classifying a given sensor based range profile by deriving an observed sequence of distances from the spacing of distinct
peaks of backscatter in the given sensor based range profile and by calculating, for each of the probabilistic models, a probability
that the respective probabilistic model represents the observed sequence of distances, wherein the object of interest represented
by the probabilistic model that represents the observed sequence of distances with the greatest probability is associated
with the given sensor based range profile; and

generating classification results for at least one of the probabilistic models so as to predict the potential performance
of a classifier.

US Pat. No. 9,946,069

DISPLAYS

BAE SYSTEMS plc, London ...

1. An optical component for a display apparatus comprising:an optical waveguide part arranged to guide light therealong between surface parts thereof by internal reflection thereat;
an input part arranged to receive light and direct the received light into the optical waveguide part; and,
an output part comprising:
a partially transmissive angularly reflective optical coating arranged upon a said surface part of the optical waveguide part and optically coupled to the input part by the optical waveguide part to receive said guided light and to transmit a portion of said guided light out from the optical waveguide part, the angularly reflective optical coating configured to transmit more than reflect light incident upon the coating in a first angular range and reflect more than transmit light incident upon the coating in a second angular range, wherein angles in the second angular range of light are greater than angles in the first angular range of incident light; and
a reflective coating inclined with respect to said surface part of the optical waveguide part and arranged to reflect said portion of said guided light back toward the angularly reflective optical coating and the optical waveguide part;
wherein the angularly reflective optical coating extends along a dimension of the optical waveguide part to expand the guided light in said dimension along the output part by repeated partial transmission thereof for output.

US Pat. No. 9,834,319

LIGHTNING PROTECTION FOR VEHICLES

BAE Systems plc, London ...

1. A vehicle (2) comprising a vehicle part (4), the vehicle part (4) comprising:
an electrically conductive core (6);

a non-electrically conductive outer skin (8), the outer skin (8) being made of a radar-absorbent material, the outer skin (8) surrounding, at least to some extent, the core (6) such that the core (6) is not visible from outside the vehicle (2); and

one or more electrically conductive members (10); wherein

each of the one or more members (10) is electrically connected to a surface of the core (6) adjacent to the outer skin (8);

each of the one or more members (10) is a tapered member having a larger cross sectional area where that member (10) is electrically connected to the surface of the core (6), than a cross sectional area of opposite end of the member (10), and tapers from its end that is electrically connected to the surface of the core (6) to a point; and

the point of each member (10) is located at an outer surface of the external skin (8) such that the point of each of the members (10) is exposed

wherein at least one of the members (10) comprises a braid of electrical conductors, thereby providing conductivity greater than a solid member due to a conductivity
skin effect.

US Pat. No. 9,784,586

PATH PLANNING

BAE SYSTEMS plc, London ...

1. An apparatus for determining a path for a vehicle, the apparatus comprising:
one or more processors configured, using a starting position for the vehicle and a desired terminal position for the vehicle,
to perform an optimisation process to determine a position for each path point in an ordered sequence of path points (P1-Pn), the ordered sequence of path points (P1-Pn) defining the path for the vehicle;

wherein performing the optimisation process comprises:
minimising a distance between the desired final position for the vehicle and a last path point (Pn) in the sequence of path points (P1-Pn);

for each path point other than a last path point (Pn) in the sequence of path points (P1-Pn), constraining a distance between that path point and the next path point in the ordered sequence (P1-Pn) to be equal to a predefined distance; and

for each path point other than the first path point (P1) in the ordered sequence (P1-Pn) and the last path point (Pn) in the ordered sequence (P1-Pn), constraining an angle between a line that connects that path point to the path point that precedes that path point in the
ordered sequence (P1-Pn) and a line that connects that path point to the next path point in the ordered sequence (P1-Pn) to be greater than or equal to a predefined angle.

US Pat. No. 9,697,801

PLOTTER INCLUDING A DISPLAY CONTROL FOR GENERATING AND SUPPLYING IMAGE DATA FOR USE BY A DIGITAL DISPLAY DEVICE TO CONTROL A STATE OF ONE OR MORE PIXELS

BAE SYSTEMS plc, London ...

1. A plotter for a digital display device, the plotter comprising:
a display control configured:
upon receipt via an input operatively coupled to the display control, at a first update phase within a first image refresh
period, of a first imagery input defining activation of a selected pixel representing at least a first portion of an image
to be displayed, to store the first imagery input in a first image buffer;

to output, to the digital display device, image data corresponding to the first imagery input as stored in the first image
buffer for setting a state of the selected pixel during the first update phase within the first image refresh period, thereby
causing the digital display device to display at least a portion of the image represented by the first imagery input;

upon receipt via the input, at a second update phase within the first image refresh period, of a second imagery input defining
activation of the selected pixel representing at least a second portion of the image to be displayed, to store the second
imagery input in the first image buffer;

to output, to the digital display device, image data corresponding to the second imagery input as stored in the first image
buffer for setting the state of the selected pixel during the second update phase within the first image refresh period as
stored in the first image buffer mixed with the image data corresponding to the first imagery input as stored in the first
image buffer, thereby causing the digital display device to display at least a portion of the image represented by the first
and second imagery inputs;

upon receipt via the input, at a first update phase within a second image refresh period subsequent to the first image refresh
period, of a third imagery input that does not define activation of the selected pixel, to store the third imagery input in
a second image buffer and remove the first imagery input from the first image buffer;

to output image data corresponding to a removal of at least the portion of the image represented by the first imagery input
for setting the state of the selected pixel during the first update phase within the second image refresh period, the output
image data being mixed with image data corresponding to the second and third imagery inputs as stored in the first and second
image buffers, thereby causing the digital display device to display at least a portion of the image represented by the second
and third imagery inputs;

upon receipt via the input, at a second update phase within the second image refresh period, of a fourth imagery input that
does not define activation of the selected pixel, to store the fourth imagery input in the second image buffer and remove
the second imagery input from the first input buffer, and

to output image data corresponding to a removal of at least the portion of the image represented by the second imagery input
mixed with image data corresponding to the third and fourth imagery inputs as stored in the second image buffer for setting
the state of the selected pixel during the second update phase of the subsequent image refresh period, thereby causing the
digital display device to display at least a portion of the image represented by the third and fourth imagery inputs,

wherein the first update phase within the first image refresh period is at a different time than the second update phase within
the first image refresh period, and

wherein the first update phase within the second image refresh period is at a different time than the second update phase
within the second image refresh period.

US Pat. No. 9,631,844

LAYER ASSEMBLY FOR HEAT EXCHANGER

BAE SYSTEMS plc, London ...

1. A layer assembly for a heat exchanger, the layer assembly comprising:
at least one heat pump module comprising a thermo-electric cooler (TEC) attached to an island formed from a flow-permissive
material, the flow-permissive material configured to permit a fluid to flow therethrough;

a flow-permissive layer provided with an island-reciprocating recess for substantially corresponding to and accommodating
the island; and

a thermal storage layer comprising a heat transfer matrix material and provided with a TEC-reciprocating recess for substantially
corresponding to and accommodating the TEC, the heat transfer matrix material being charged with a phase-change material;

wherein the TEC is attached to the thermal storage layer at a surface of the TEC-reciprocating recess, and the flow-permissive
layer and the thermal storage layer are arranged such that the island of flow-permissive material extends into the island-reciprocating
recess and a separation exists between the island and the flow-permissive layer.

US Pat. No. 9,618,751

HEAD MOUNTED DISPLAY

BAE SYSTEMS PLC, London ...

1. A head-mounted or helmet-mounted display apparatus comprising:
an optical element which in use is disposed in front of the eyes of a user, the optical element comprises a waveguide portion,
the waveguide portion which in use is also disposed in front of the eyes of the user;

a light source of image-bearing light;
an input element configured to input the image-bearing light to the waveguide portion;
a first diffraction means for propagation of image-bearing light of the light source through the waveguide portion, the first
diffraction means being arranged to release the image bearing light from the waveguide portion, the waveguide portion having
optical powers such that the released light provides a first visible image to one of the user's eyes;

a second diffraction means for propagation of image-bearing light of the light source through the waveguide portion, the second
diffraction means being arranged to release the image bearing light from the waveguide portion, the waveguide portion having
optical powers such that the released light provides a second visible image to the other of the user's eyes, the waveguide
portion including the first diffraction means and the second diffraction means; and

a switching means for switching the image-bearing light repeatedly between the first diffraction means and the second diffraction
means whereby to provide the first visible image or the second visible image to a respective eye of a user.

US Pat. No. 9,551,840

PROVISION OF AN OPTICAL ROTATING JOINT INSTALLATION

BAE SYSTEMS plc, London ...

1. An optical rotating joint installation comprising:
a first platform;
a second platform;
a drive shaft arranged at a rotating interface between the first and second platform, the drive shaft being fixed to the first
platform and rotatably mounted in the second platform, the drive shaft comprising a hollow central bore;

an optical rotating joint located in the hollow central bore; and
an annularly positioned slip ring between the first platform and the second platform and external to the drive shaft,
wherein one of the first platform and the second platform comprises a sensor system and the other of the first platform and
the second platform comprises a control system, and the optical rotating joint allows optical signals to be passed between
the sensor system and the control system.

US Pat. No. 9,921,007

LAMINATED HEAT EXCHANGER INCLUDING A HEAT SINK AND A THERMOELECTRIC DEVICE

BAE SYSTEMS PLC, London ...

1. A modular laminated stacked plate heat exchanger assembly (201) comprising:
an individual unitary first aluminum hot channel plate (214);

a first hot fluid flow channel open cell aluminum foam (210a);

an individual unitary second aluminum hot channel plate (214);

an individual unitary first hot channel side wall (212); and

a individual unitary second hot channel side wall (212);

wherein said first hot fluid flow channel open cell aluminum foam at least partially fills a volume defined by said first
aluminum hot channel plate (214), said second aluminum hot channel plate (214), said first hot channel side wall (212), and said second hot channel side wall (212);

wherein said first hot channel side wall (212) and said second hot channel side wall (212) are placed between said first aluminum hot channel plate (214) and said second aluminum hot channel plate (214), placing said first aluminum hot channel plate (214) and said second aluminum hot channel plate (214) in a spaced-apart relationship;

thereby forming a first hot fluid flow channel (210a);

a first heat sink (240a), said first heat sink (240a) formed by a first open cell aluminum foam (240a), wherein voids within said first open cell aluminum foam (240a) are at least partly filled with a phase change material;

said first heat sink (240a) having a first heat sink open face opposite a first heat sink closed face;
wherein said first heat sink (240a) open face abuts said second aluminum hot channel plate (214);
a first thermoelectric cooling device (250a), said first thermoelectric cooling device (250a) having a first thermoelectric cooling device open face and a first thermoelectric cooling device closed face;

wherein said first thermoelectric cooling device closed face is connected to said first heat sink closed face;
said first heat sink (240a) and said first thermoelectric cooling device (250a) forming a first heat exchanger (230a);

wherein said first thermoelectric cooling device open face abuts a lower, first, surface of a first cold fluid flow channel
(220a);

a second heat exchanger (230b) comprises a second heat sink (240b) and a second thermoelectric cooling device (250b);

said second heat sink (240b) formed by a second open cell aluminum foam (240b), wherein voids within said second open cell aluminum foam (240b) are at least partly filled with a phase change material;

said second heat sink (240b) having a second heat sink open face opposite a second heat sink closed face;

wherein said second heat sink (240b) open face abuts a first aluminum hot channel plate (214) of a second hot fluid flow channel (210b);

said second thermoelectric cooling device (250b) having a second thermoelectric cooling device open face and a second thermoelectric cooling device closed face;

wherein said second thermoelectric cooling device closed face is connected to said second heat sink closed face;
said second thermoelectric cooling device (250b) open face abuts an upper, second, surface of said first cold fluid flow channel (220a), thereby forming said first cold fluid flow channel (220a);

an individual unitary first cold fluid flow channel first side wall (222); and

an individual unitary first cold fluid flow channel second side wall (222);
wherein said first cold channel side wall (222) and said second cold channel side wall (222) are placed between said first thermoelectric cooling device (250a) and said second thermoelectric cooling device (250b), placing said first thermoelectric cooling device (250a) and said second thermoelectric cooling device (250b) in a spaced-apart relationship.

US Pat. No. 9,875,549

CHANGE DETECTION IN VIDEO DATA

BAE SYSTEMS PLC, London ...

1. Apparatus for processing a sequence of images of a scene, the apparatus comprising:
a controller;a first module; and
a second module; wherein
the first module is configured to perform an image registration process on a sequence of images, wherein the sequence of images
is a sub-sequence of a larger sequence of images generated by a moving camera, the larger sequence of images comprising:
a plurality of sub-sequences, to produce a registered set of images;
the second module is configured to perform a change detection process on the registered set of images; andthe controller is configured to provide:
to the first module, an instruction to perform the image registration process on the sequence of images to produce the registered
set of images;

to the second module, an instruction to perform the change detection process on the registered set of images; and
an instruction that the registered set of images is to be transferred between the first module and the second module;thereby detecting of changes in said larger sequence of images is generated by a moving camera, wherein the change detection
process comprises:
for a particular image in the registered set of images, determining a background image;
for a particular pixel in the particular image, determining a value for one or more parameters;for a particular pixel in the background image that corresponds to the particular pixel in the particular image, determining
a value for the one or more parameters; and
comparing a function of the determined values for the particular image to a further function of the determined values for
the background image;

updating said background image by fusing each said particular image in said registered set of images with said background
image after comparing a function of the determined values for the particular image to a further function of the determined
values for the background image.

US Pat. No. 9,797,698

COMMON CARRIER MUNITION

BAE SYSTEMS plc, London ...

1. A common carrier munition comprising a tail unit, a main body which comprises a payload cavity for receiving a payload,
a fuze, and located between said main body and the fuze an ogive element, wherein the tail unit and main body comprise cooperatively
engaging male and female threaded portions, wherein at least one of the threads is a shearable thread, wherein the ogive element
is reversibly engaged with the fuze and main body, and a frangible link that retains the ogive element and main body in operable
arrangement, such that upon an impact, said frangible link is caused to fail, and such that said shearable thread has a lower
shear strength than the frangible link to allow for the shearable thread to fail during flight of the common carrier munition.

US Pat. No. 9,725,172

SURVEILLANCE SYSTEM

BAE SYSTEMS plc, London ...

1. A grenade launched aerial surveillance vehicle, comprising:
an integral propellant charge, whereupon launch said surveillance vehicle is launched, by an operator, from a grenade launcher-weapon,
wherein the operator comprises at least one visual display and at least one control device for operating said surveillance
vehicle;

a trunion pivotally mounted to the surveillance vehicle and configured to pivot from a stowed position within a body of the
vehicle to a deployed position that is exterior to the body of the vehicle, and further configured to pivot about a pitch
axis passing through a center of gravity of the surveillance vehicle while in the deployed position;

a deployable wing connected to the trunnion;
a guidance system comprising altitude lock to provide a substantially circular flight path around a target at a fixed GPS
co-ordinate;

a wing adjuster to provide directional nudge to the flight path;
an electrical power source;
at least one optical sensor, pivotally mounted on said surveillance vehicle;
a communication device configured to relay guidance and data output from said at least one optical sensor to the operator;
a propulsion device for providing aerial movement of the surveillance vehicle; and
a spin inhibitor for reducing spin on the surveillance vehicle prior to a deployment of the deployable wing.

US Pat. No. 9,692,583

DUPLEXER

BAE Systems plc, London ...

1. A duplexer for a radio frequency antenna, comprising:
a radio frequency signal transmitter port arranged for connection to a radio frequency signal transmitter;
a radio frequency signal receiver port arranged for connection to a radio frequency signal receiver;
a switch arranged selectively to adopt either one of:
a first state which connects the transmitter port to a common input/output port of the switch arranged for connection to a
radio frequency antenna; and

a second state which connects the receiver port to the common input/output port;
a switch control unit arranged to monitor radio frequency power at the common input/output port and to receive a transmission
gate signal;

wherein the switch control unit is arranged to control the switch to adopt the first state upon receipt of the transmission
gate signal, and, subsequently, to control the switch to adopt the second state when the monitored radio frequency power falls
below a threshold level.

US Pat. No. 9,692,512

DIRECTIONAL MULTIBAND ANTENNA

BAE SYSTEMS plc, London ...

1. A directional multi-band antenna comprising:
a substrate structure;
a plurality of radio frequency (RF) units arranged at the substrate structure to provide an RF phased array, the RF phased
array having an angular scan range;

an array of optical units arranged at the substrate structure and interspersed amongst the RF units; and
an array of optical lensing devices supported over the substrate structure, the array of optical lensing devices being substantially
RF transmissive and being arranged to correspond with the arrangement of the optical units, such that each optical unit may
communicate light signals with an associated optical lensing device so as to communicate light signals along an optical axis
within the angular scan range of the RF phased array,

wherein the antenna is a Vivaldi-type array where the substrate structure comprises a first set of boards and a second set
of boards, the first and second sets being orthogonal and intersecting, and having onto them formed RF units, such that interstices
between the boards define voids.

US Pat. No. 10,131,447

GLIDE PATH INDICATOR

BAE Systems plc, London ...

1. A glide path indicator configured to be mounted on a vehicle, said glide path indicator comprising:a light emitter configured to emit a visible light signal that defines a glide path for use by a pilot of an approaching aircraft;
a camera configured to capture images of the approaching aircraft, the camera being arranged such that at least part of the glide path defined by the light emitter is located within a field of view of the camera; and
a common stabilisation module configured
to stabilise the light emitter so as to reduce or eliminate the effects of the vehicle's motion on the glide path, and
to stabilise the camera so as to reduce or eliminate the effects of the vehicle's motion on the camera's field of view.

US Pat. No. 10,088,289

IGNITER DEVICE

BAE Systems PLC, London ...

1. An igniter device, comprising:a first synthetic polymer layer having a first plurality of holes extending therethrough; and
a second synthetic polymer layer having a second plurality of holes extending therethrough,
wherein the first synthetic polymer layer and the second synthetic polymer layer envelope a portion of an energetic material, wherein the first and second plurality of holes form clear holes from one side of the igniter device through to another side of the igniter device while the first and the second synthetic polymer layers envelop the portion of the energetic material without causing leakage of the energetic material, and
wherein the first and second synthetic polymer layers each comprise a synthetic polymer material that is capable of being sealed.

US Pat. No. 10,087,039

SURVEILLANCE APPARATUS

BAE SYSTEMS plc, London ...

1. A surveillance apparatus comprising:a cambered tape having a first end and a second end;
a housing;
a spooling mechanism mounted at the housing, and being rotatable relative to the housing, and being attached to the second end of the cambered tape, the spooling mechanism being:
operable to rotate in a first direction to convert the cambered tape from a coiled condition to an extended condition and thereby pay-out a support member from the housing, and
operable to rotate in a second direction opposite to the first to convert the cambered tape from the extended condition to the coiled condition and thereby retract the support member into the housing;
a mount attached to the first end of the cambered tape;
a surveillance device attached to the mount for receiving environmental signals;
a human interface remote from the surveillance device and including a receiver for receiving electromagnetic signals; and
a signal interface for relaying the environmental signals received at the surveillance device to the human interface, wherein the signal interface includes a transmitter for sending a first electromagnetic signal to the receiver of the human interface, wherein the transmitter of the signal interface further comprises an antenna arranged along a portion of the tape, and wherein the antenna is substantially planar and sufficiently flexible to be mounted on the tape to conform to the tape in both the coiled condition and the extended condition;
wherein the surveillance device may be supported, remote from the human interface by paying out the member.