1. A method for closed-loop-control of a fluid conveying system, comprising the steps of:

providing at least one pump, at least one consumer connected to the at least one pump, at least one control valve connected

to the at least one consumer, and at least one armature connected to said at least one control valve as an actuator of said

at least one control valve;

controlling a pressure and a volume flow rate of the at least one consumer independently of each other using a decoupling

controller connected to control at least one of: said at least one pump and said at least one armature; and

the decoupling controller performing a decoupled control operation with a control rule r (x) according to

wherein D* is a decouplability matrix, a is a coefficient, x is a declaration of a state space vector, k is an index of summation,

m is a number of inputs and outputs, r is a controller parameter with i being an index of the decoupled subsystem, Lf is a Lie-derivative of a function h, the function h is along a vector field of the fluid, and c* is