Study of resonant vibrations shapes of the beam type piezoelectric actuator with preloaded mass
Authors
D. Mažeika
R. Bansevičius
Abstract
Results of numerical modeling and simulation of multimode resonant vibrations of the beam type piezoelec-tric actuator are presented in the paper. The investigated actuator consists of piezoceramic beam with a single mass at one of the ends. Electrodes pattern has two sections and two schemes of excitation are used. Operation of the actua-tor is based on using multimode resonant vibrations where superposition of longitudinal and flexural modes is used. Two separate resonant vibration modes and electrode exci-tation schemes are used for direct and reverse motion of the actuator. Numerical modeling based on the finite ele-ment method was performed to find multimode resonant frequencies and modal shapes and to calculate the trajecto-ries of contact point movement under different excitation schemes. Results of numerical simulation demonstrate the influence of preloaded mass on vibration shapes and pa-rameters of the trajectories of contact point movement.