变刚度支撑圆窗激振压电作动器优化设计  

Optimal Design of Variable Stiffness Supported Round-Window Stimulating Piezoelectric Actuator

作　　者：姚旭 张瑞宁 寇寅欣 刘稳 杨善国[1] 刘后广[1] YAO Xu;ZHANG Ruining;KOU Yinxin;LIU Wen;YANG Shanguo;LIU Houguang(School of Mechatronic Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;Department of Otolaryngology,Affiliated Hospital of Xuzhou Medical University,Xuzhou Jiangsu 221000,China;Artificial Auditory Laboratory of Jiangsu Province,Xuzhou Jiangsu 221000,China)

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116 [2]徐州医科大学附属医院耳鼻咽喉科,江苏徐州221000 [3]江苏省人工听觉实验室,江苏徐州221000

出　　处：《机械设计与研究》2024年第2期230-235,246,共7页Machine Design And Research

基　　金：国家自然科学基金面上项目(52275296)。

摘　　要：针对现有临床上所用的圆窗激振式人工中耳作动器存在和圆窗膜不匹配、初始压力无法监控的问题,结合人耳解剖结构,设计了一款变刚度支撑式压电作动器。首先建立作动器与人耳耦合模型;然后基于该模型对作动器位移放大器、支撑弹簧、压电叠堆的关键参数进行了优化分析;最终通过试验测试作动器输出性能。试验结果表明,所设计的压电作动器实现了初始压力的监控;且谐振频率高达5 160 Hz,高频特性优越。满足圆窗激振的需求,有利于补偿感音神经性患者的听力损伤。Aiming at the problems of mismatch between circular window and circular window membrane and the inability to monitor the initial pressure,a piezoelectric actuator with variable stiffness support is designed based on the anatomical structure of human ear.Firstly,the coupling model between the actuator and the human ear is established.Then,based on the model,the key parameters of the actuator displacement amplifier,support spring and piezoelectric stack are optimized and analyzed.Finally,the output performance of the actuator is tested by experiment.The experimental results show that the designed piezoelectric actuator can monitor the initial pressure.The resonant frequency is up to 5160 Hz,and the high frequency characteristics are superior.The actuator meets the needs of round window stimulation,and can improve hearing loss compensation in sensorineural patients.

关 键 词：圆窗激振 压电作动器 变刚度支撑 位移放大器 听力补偿 

分 类 号：TH789[机械工程—仪器科学与技术]