OCT内窥镜驱动控制用微型压电马达的机电耦合动力学特性研究  

Electro-mechanical coupled dynamic characteristics of micro piezoelectric motors for driving control of OCT endoscope

作　　者：刘周龙 周铄 朱强国 郑友成 王光庆[1] LIU Zhoulong;ZHOU Shuo;ZHU Qiangguo;ZHENG Youcheng;WANG Guangqing(School of Information and Electronic Engineering(Sussex Artificial Intelligence Institute),Zhejiang Gongshang University,Hangzhou 310018,China)

机构地区：[1]浙江工商大学信息与电子工程学院(萨塞克斯人工智能学院),杭州310018

出　　处：《振动与冲击》2023年第21期254-262,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金面上项目(51777192);浙江省自然科学基金(LY20E070001)。

摘　　要：针对光学相干成像技术(optical coherence tomography,OCT)内窥镜驱动控制应用要求,开发设计了直径1 mm、长度5 mm的微型压电马达。利用铁木辛柯梁模型和模态求和法推导马达定子在外部激励电压下的动态响应,结合Hamilton能量变分原理计算得到定子表面质点的模态振动位移和椭圆运动轨迹;进一步利用定转子接触模型和转子力矩平衡原理建立了微型马达的整体机电耦合动力学模型,仿真分析了不同参数对马达力矩-转速,力矩-效率以及负载特性等的影响。试验结果表明,当施加幅值30 V,频率21 kHz的激励电压时,马达转速随负载增加而减小,空载最大转速和力矩分别为400 r/min和2.4 mN·m,满足OCT内窥镜驱动控制应用要求。Here,aiming at application requirements of optical coherence tomography(OCT) endoscope driving control,a micro piezoelectric motor with diameter of 1 mm and length of 5 mm was developed and designed.The motor stator's dynamic response under external excitation voltage was derived by using Timoshenko beam model and modal summation method.Modal vibration displacement and elliptical motion trajectory of stator surface mass point were calculated with Hamilton energy variational principle.Furthermore,using the contact model between stator and rotor and the principle of rotor torque balance,the overall electromechanical coupling dynamics model of the micro motor was established.Effects of different parameters on torque-rotating speed,torque-efficiency and load characteristics of motor were simulated and analyzed.The experimental results showed that when the excitation voltage with amplitude of 30 V and frequency of 21 kHz is applied,the motor rotating speed decreases with increase in load,its maximum no-live load rotating speed and torque are 400 r/min and 2.4 mN·m,respectively to satisfy application requirements of OCT endoscopic driving control.

关 键 词：微型压电马达 机电耦合动力学模型 仿真分析 光学相干成像技术(OCT)内窥镜 

分 类 号：TM38[电气工程—电机] TH16[机械工程—机械制造及自动化]