Wide frequency range electromechanical actuator

摘要

An electromechanical motor, using at least two electromechanical actuating elements (6) interconnected by a common actuator backbone (5) is disclosed. The actuating elements are controllable in both a longitudinal direction (L) and a flexural direction, i.e. bending of the actuating element, separately. The different actuating elements can be controlled individually as well. The actuator (3) dimensions are preferably selected to resonance frequencies in vicinity of a certain frequency. The actuating elements are provided with interaction portions (7) at which any contact between the actuator and a body (2) to be moved is made. In order to operate well both in fine-positioning and resonant motion, the actuator backbone has a good acoustic coupling to the actuating elements, whereby the actuator backbone passively participates in excited vibrations bending motions with nodes at pivot supports between the actuator backbone and an actuator stator portion (4).