Patent ID: 7489987

Claim:
A control system for controlling an active vibration isolation system incorporating: i) a plurality of vibration signal transducers ( 2 ) for providing analog sensor signals, ii) a plurality of actuators ( 3 ) for suppressing vibration, iii) a control unit for processing the analog sensor signals to form digital actuator actuation signals, iv) an analog-digital converter ( 4 ) for converting the analog sensor signals to digital sensor signals, and v) a digital-analog converter ( 6 ) for converting the digital actuator actuation signals to analog actuator actuation signals, characterized by comprising: an FPGA system ( 5 ) as a control unit, which is made up of freely programmable gate arrays and comprises: a) a sensor control matrix ( 51 ), which calculates axis signals in required degrees of freedom, namely by means of the digital sensor signals depending on the spatial arrangement of the vibration signal transducers ( 2 ) and their directional sensitivity, b) a control cascade block ( 53 ) for the axis signals containing multiple biquad filters ( 531 , 532 , 533 , 534 , 535 ) in each row for one degree of freedom, which respectively constitutes a calculation rule with freely adjustable coefficients in order to provide axis output signals, and c) an output signal calculation block ( 55 ) for calculating digital actuator actuation signals, starting from the axis output signals.