Patent ID: 7719165

Claim:
A method for the precise dynamic digital control of piezoelectric actuators for micropositioning systems having a proportional integral derivative (PID) regulator, the method comprising: estimating future system behavior to minimize order deviations; obtaining current correction signals a feedforward correction; reducing latency times in the feedforward loop of a sampling system, by applying a signal of a command via a switch having a switchable bypass to a high resolution digital/analog converter with the high resolution digital/analog converter being operated at a sampling rate of the sampling system, a PID feedforward loop further leading to a fast digital/analog converter which is controlled independently of the sampling system; and supplying output signals of the high resolution digital/analog converter and the fast digital/analog converter, which represent control voltages, in an added-up form to a piezoelectric actuator which together with a position sensor forms a controlled system.