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

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (21) : 254-262.

论文

刘周龙,周铄,朱强国,郑友成,王光庆

作者信息 +

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

LIU Zhoulong, ZHOU Shuo, ZHU Qiangguo, ZHENG Youcheng, WANG Guangqing

Author information +

文章历史 +

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。实验结果表明，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 rpm和2.4 mN•m，满足OCT内窥镜驱动控制应用要求。

Abstract

Focusing on the driving and controlling of the OCT endoscopic, a micro piezoelectric motor with diameter 1 mm and length 5 mm is designed and developed. The dynamic response of the motor stator under the external excitation voltage was derived by using the Timoshenko beam theory and modal summation, combining with the Hamilton principle, the particle displacement and ellipse trajectory of the stator surface were further calculated; Furthermore, the whole electromechanical coupling dynamics model of the micro-motor was established by using the friction contact model and the torque balance model. The effects of different parameters on the torque-speed, torque-efficiency and load characteristics were simulated and analyzed. The results show that the motor speed decreases with the increase of load. When the excitation voltage with amplitude 30 V and frequency 21 kHz is applied, the maximum no-load speed and torque are 400 rpm and 2.4 mN•m, which meets the requirements of OCT endoscope drive control application.

导出引用

刘周龙, 周铄, 朱强国, 郑友成, 王光庆. 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[J]. 振动与冲击, 2023, 42(21): 254-262

LIU Zhoulong, ZHOU Shuo, ZHU Qiangguo, ZHENG Youcheng, WANG Guangqing. Electro-mechanical coupled dynamic characteristics of micro piezoelectric motors for driving control of OCT endoscope[J]. Journal of Vibration and Shock, 2023, 42(21): 254-262

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