LATEST TRENDS IN THE DEVELOPMENT OF PIEZOELECTRIC MULTI-DEGREE-OF-FREEDOM ACTUATORS/SENSORS

摘要

The concept of Piezomechanics (Piezoelectricity + Mechanics + Control) describing a complex interaction of dynamic effects and precision-engineered devices is presented. Piezomechanics is considered as part of the more broad philosophy of Mechatronic devices. New structure units of precise mechanisms - active kinematic pairs are described; in them forces or torque are generated in the contact zone between components. A lot of schematics of piezoelectric multi-degree-of-freedom actuators/sensors are presented; they include the actuators with separated power and control systems and actuators, in which transformation of high frequency resonant oscillations into continuous motion is taking place. It is shown that functional ability of the mechanisms can be increased by using hybrid composite systems, made from two or more alternating layers of piezoceramic and magnetostrictive plates or films.