Affiliation of Author(s):航空学院

Journal:PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY

Key Words:Analytical model V-shaped piezoelectric transducer Flexible joint Elliptical motion

Abstract:Piezoelectric transducers are widely used for generating an elliptical motion in vibration-assisted machining and in a piezoelectric actuator. In this study, an analytical model of a V-shaped piezoelectric ultrasonic transducer with a flexible joint is proposed. The analytical model is used to optimize the structure, predict the performance, and design the controller and drive circuit. The longitudinal-bending mode is utilized for generating an elliptical motion at a drive foot. A vibration model of the V-shaped transducer is proposed. The vibration resonance frequency and mode shape are obtained by solving a set of differential equations of the balance force and continuous displacement. The energy method is then used to derive the displacement response based on Hamilton-Lagrange equations. Finally, three prototypes are fabricated to validate the model effectiveness. The resonance frequency, displacement response, and electric response of the analytical model are consistent with the experimental results. The results show that the vibration amplitude in the tangential direction X at the drive foot increases with the increase of the phase difference phi, and the amplitude in the normal direction Y decreases with the decrease of the phase difference phi. As the coupling angle theta increases, the amplitude in the tangential direction X increases and the amplitude in the normal direction Y decreases.

ISSN No.:0141-6359

Translation or Not:no

Date of Publication:2018-04-01

Co-author:Li, Xiaoniu

Correspondence Author:yao zhiyuan