单级放大机电集成压电谐波电机设计与仿真分析

Design and Simulation of a Single Amplification Electromechanical Integrated Harmonic Piezoelectric Motor

设计了一种单级放大机电集成压电谐波电机,阐述了该种电机的工作原理,给出了其设计方法、连续传动条件及参数选择原则。针对电机中容易发生失效的区域,推导了最大应力公式,通过有限元仿真对比验证了理论公式的正确性。分析了电机的固有频率和振型以及电机在简谐激励下的位移和应力响应。结果表明:电机理论最大应力为45.54MPa,与仿真最大应力相差4.04%;激励作用下,活齿振动位移最大,活齿架应力集中最严重。

A single amplification electromechanical integrated harmonic piezoelectric motor was designed,and the working principles were illustrated.Besides,the design procedure,continuous transmission conditions and principles of parameter selection were given.For the failure regions existed in the motor,the maximum stress equation was deduced and was verified by comparing with FEM results.In addition,the natural frequencies,modal shape and displacement and stress response under excitation were analyzed.Results show,the maximum stress is as 45.54 MPa,and the difference is only 4.04% comparing with FEM results.Under the action of incentive,the vibration displacement of movable tooth is largest,and stress concentration on tooth carrier is most serious.