Physik Instŕumente (pi) Gmbh & Co. Kg

Physik Instrumente (pi) Se & Co. Kg

Physik Instrumente Gmbh & Co. Kg

Koc Burhanettin

A method is provided of controlling at least two interacting piezoelectric actuators for commonly displacing an object attached thereto. The method comprises the following steps: a. Step A: applying a first cyclic drive voltage signal with a constant frequency to the first piezoelectric actuator, b. Step B: applying a second cyclic drive voltage signal with a constant frequency to said second piezoelectric actuator, whereby the frequencies of the first and second cyclic drive voltage signals are substantially identical and whereby the frequencies of the first and second cyclic drive voltage signals are substantially oppositely phased, and in which at least in a predetermined time period the cyclic drive voltage signals in step A and B are synchronized such that at least one time phase is comprised in which the drive voltage signals of the first and second piezoelectric actuators have both a gradient of decreasing or increasing the respective drive voltage signal having the same sign or one of these gradients is zero and the other is not zero.

Method of controlling at least two interacting piezoelectric actuators

An inertia drive motor is disclosed which includes an element to be driven, and a stator, the stator having: an elastic frame, at least one friction element arranged on the elastic frame and configured to be brought into frictional contact with the element to be driven, and a first electromechanical actuator and a second electromechanical actuator, which are configured to cause, by interaction, a deformation of the elastic frame, upon excitation with different excitation voltages having a sawtooth signal, so as to displace the at least one friction element for driving the element to be driven by stick-slip contact with the friction element.

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Ettlingen, Germany

Koc Burhanettin