Patent ID: 7207177

Claim:
A position control device for an electrical-fluid power drive comprising a force output point, and a fluid power actuator together with an electrical actuator for driving the force output point wherein said device is designed to derive the target overall drive force values of a target overall drive force, to be provided by the fluid power actuator and the electrical actuator jointly, for a positioning movement of the force output point to a positioning location able to be predetermined for the position control device, to derive target fluid drive force values of a target fluid power drive force, to be provided by the fluid power actuator, and to derive target electrical drive force values of a target electrical drive force to be provided by the electrical actuator, the target fluid drive force values and the target electrical drive force values being derived on the basis of the target overall drive force values in such a manner that the target electrical drive force is provided during those portions of the target overall drive force comprising a higher rate of change or frequency of change than those portions of the target overall drive force during which the target fluid power drive force is provided, wherein the position control device is designed for the derivation of the target fluid drive force values and of the target electrical drive force values in a fashion dependent on the change rate or change frequency of the target overall drive force values.