Combined Simulation of a Modified Piezoelectric Plate Transducer

摘要

It is common to use additional actuators to keep vibrating electromechanical systems without rigid connection to the inertial frame, e.g. cameras or hard disc drives, in position. In this paper we investigate an arrangement where a modified piezoelectric bending plate is used for position stabilization. In precision and microsystems engineering such plate transducers are used for transduction of volume flows or pressures. Other applications can be found in medical devices. The transducer is placed inside á closed capsule providing two air cavities in its front and back. A concentrated mass element connected to the plate supports the stabilization. Based on already existing network approaches the piezoelectric plate transducer model has been developed into a new multi domain network model. The network model further involves electrical, mechanical and acoustical properties of the enclosed transducer. Interactions between the transducer and the surrounding capsule have also been modeled in an acoustical network. The influence of size and numbers of holes in the plate on the electromechanical and acoustical properties of the transducer was investigated and optimized by network simulations.