双足驱动双压电晶片直线超声波电机运行机理研究

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (22) : 21-25.

论文

双足驱动双压电晶片直线超声波电机运行机理研究

陈强,徐志科

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Research on Operation Mechanics of Double-driving Feet Linear Ultrasonic Motor Using Bimorphs

Chen Qiang1,Xu Zhike2

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摘要

本文研究了一种新型直线超声波电机的运行机理，采用双压电晶片和双足驱动结构，该电机具有结构简单、无需频率简并、易于进一步小型化等优点。本文详细阐述其结构、振形特点和工作机理。建立了电机定子的振动响应有限元模型，给出输入阻抗的计算方法，得到定子输入阻抗。并用已建立的模型，计算得到定子驱动足接触点在谐振频率点附近的振幅，推导出驱动足接触点运动轨迹。通过实验测量定子阻抗特性，将所得结果与理论分析进行比较。

Abstract

Operation mechanics of a new type linear ultrasonic motor is analyzed in this paper. It uses bimorphs and double-driving feet. The motor has the attribute of simple structure, no frequence degenerate and easy to miniaturize. The construction, vibration mode and operation principle are described. The vibratory response finite element model of the stator is established. The computation method of input impedance of the stator is presented, and the input impedance of the stator is computed. The vibration amplitude of the driving-feet’s contact points near the harmonic frequence is computed by the above model. The movement locus of the driving-feet’s contact points are carried out. The impedance characteristic of stator has been surveyed by using impedance characteristic analysis instrument, and the experimental results are compared with the theory analysis.

导出引用

陈强;徐志科. 双足驱动双压电晶片直线超声波电机运行机理研究[J]. 振动与冲击, 2014, 33(22): 21-25

Chen Qiang;Xu Zhike. Research on Operation Mechanics of Double-driving Feet Linear Ultrasonic Motor Using Bimorphs[J]. Journal of Vibration and Shock, 2014, 33(22): 21-25