PMN-PT ceramics for active vibration control

Abstract

A 1-D experimental vibration control set-up is studied. It uses a Berlin court piezometer as a vibrating source and the internal piezoelectric calibration ceramic as a sensor. A piezoelectric or electrostrictive actuator made of PMN-PT ceramics (65/35 or 90/10) is mechanically coupled to the sensor and used to con trol the motion at different points of the structure which provides two main reso nance modes between 100 and 1000 Hz. It is shown that the amplitude of motion at resonance can be either enhanced or reduced with the piezoelectric actuator de pending on the phase shift between sensor and actuator, while it can only be en hanced with the electrostrictive actuator. A simple model of the system is pro posed.