一种细长形非共振式压电直线电机结构优化设计  

Structural optimization design of a slender non resonant piezoelectric linear motor

作　　者：张兵 李朝东[1] 刘涛[1] ZHANG Bing;LI Chaodong;LIU Tao(School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200072,China;School of Mechanical and Electrical Engineering,Lianyungang Technical College,Lianyungang 222006,China)

机构地区：[1]上海大学机电工程与自动化学院,上海200072 [2]连云港职业技术学院机电工程学院,江苏连云港222006

出　　处：《振动与冲击》2022年第10期238-243,251,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51577112);江苏省“青蓝工程”基金项目(2019)。

摘　　要：设计出一款基于桥式放大机构的细长形非共振压电直线电机,该电机尺寸为29 mm×5 mm×3.5 mm,论述了其工作原理,建立了物理模型并基于能量守恒原理推导出位移放大机构放大倍数的数学模型,通过仿真和试验验证了数学模型的正确性。根据数学模型得出了影响电机力学性能的各种结构参数,进而对结构参数进行了优化,最后研制出优化后的样机,并对优化前后的样机力学性能进行试验对比。试验结果显示,当两个驱动信号相位差为90°时,电机的输出驱动力达到最大;优化后的电机在峰值驱动电压为140 V、偏置电压为70 V、保持力为2.2 N的情况下,电机空载最高转速从6.69 mm/s线性增加到7.67 mm/s,速度载荷特性比优化前有明显的提升。研究结果表明,通过建立正确的数学模型能有效分析出影响电机性能的关键结构参数,改进后的电机力学性能得到显著提升。A slender non resonant piezoelectric linear motor based on bridge amplification mechanism was designed.The size of the motor is 29 mm×5 mm×3.5 mm.The working principle of the motor was discussed,and its physical model was established.Based on the energy conservation principle,the mathematical model for the amplification factor of the displacement amplification mechanism was deduced.The correctness of the mathematical model was verified by simulations and experiments.According to the mathematical model,various structural parameters affecting the mechanical properties of the motor were found,and then the structural parameters were optimized.Finally,an optimized prototype was developed,and the mechanical properties of the prototype before and after optimization were compared.The test results show that when the phase difference between the two driving signals is 90°,the output driving force of the motor reaches the maximum.When the peak driving voltage is 140 V,the bias voltage is 70 V and the holding force is 2.2 N,the maximum no-load speed of the optimized motor increases linearly from 6.69 mm/s to 7.67 mm/s,and the speed load characteristics are significantly improved.The results show that the key structural parameters affecting the motor performance can be effectively analyzed by establishing the correct mathematical model,and the mechanical properties of the improved motor can be significantly improved.

关 键 词：细长形 非共振 压电电机 优化设计 

分 类 号：TH113[机械工程—机械设计及理论]