Nonlinear free vibration of drive system for an electromechanical integrated harmonic piezoelectric motor

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (6) : 7-12.

LI Chong，XU Li-zhong，GAO Li-chao

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Abstract

An electromechanical integrated harmonic piezoelectric motor which integrates piezoelectric driving, harmonic drive and movable tooth drive is designed and the principle of the motor is discussed. Using the theory of planetary gear transmission for reference, the dynamic models of drive system are set up. Utilizing Linz Ted-Poincaré method, the equations of frequency characteristic and displacement response are deduced. Then, the law of frequency variation and the characteristic of time response are analyzed. Finally, the ANSYS finite element software is applied to verify the frequencies. Results show, the nonlinear of the drive system is caused by the changing of meshing teeth number, and the fewer the meshing teeth number, the more obvious the nonlinear phenomenon of the drive system. In the displacement response, the x and u direction of harmonic generator are the most and the least affected by nonlinear phenomenon. Finite element simulation verifies the correctness of the dynamic model.

Key words

harmonic piezoelectric motor / drive system / nonlinear / free vibration / Linz Ted-Poincaré / method

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LI Chong，XU Li-zhong，GAO Li-chao. Nonlinear free vibration of drive system for an electromechanical integrated harmonic piezoelectric motor[J]. Journal of Vibration and Shock, 2016, 35(6): 7-12

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