径向双压电叠堆执行器建模与实验研究  

Modeling and Experimental Study on Radial Dual-Piezoelectric Stack Actuator

作　　者：江裕雷 朱玉川[1] 陈龙 邰明皓 郑述峰 JIANG Yulei;ZHU Yuchuan;CHEN Long;TAI Minghao;ZHENG Shufeng(College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《压电与声光》2021年第1期45-50,共6页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(51975275)。

摘　　要：该文设计了一种径向双压电叠堆执行器,可以实现单压电或双压电叠堆驱动,在不增加轴向长度的基础上实现输出位移的放大。针对该执行器,建立了基于Bouc-Wen的压电动态迟滞力模型作为执行器整体动力学模型力的输入;在MATLAB/Simulink中,基于最小二乘法对迟滞力模型中的参数进行辨识。仿真与实验结果表明,在峰-峰值140 V、直流偏置70 V的激励信号下,两根长为18 mm的压电叠堆在复合驱动下能输出约55μm的位移,实现了执行器的位移放大输出且在高频下无明显衰减;所建立的执行器动态迟滞模型很好地描述了单压电或双压电叠堆在1~600 Hz驱动频率下的电压-位移滞环曲线。在驱动频率为600 Hz时,双压电复合驱动的模型最大均方根误差为1.13μm,最大相对误差为6.1%,为大位移、高精度的执行器控制提供了基础。A radial dual-piezoelectric stack actuator is designed,which can realize the single piezoelectric or dual-piezoelectric stack driving,and can amplify the displacement output without increasing the axial length of actuator.A piezoelectric dynamic hysteresis force model based on Bouc-Wen is established as the force input of the whole dynamic model of the actuator,the parameters in the hysteresis force model are identified based on the least square method in MATLAB/Simulink.The simulation and experimental results show that at the excited signal of 140 V peak-to-peak value and 70 V DC offset,two piezoelectric stacks with a length of 18 mm can output a displacement of about 55 m under the compound driving,realizing the displacement amplification output of the actuator without obvious attenuation at high frequency.The established dynamic hysteresis model of the actuator well describes the voltage-displacement hysteresis curve of single or double piezoelectric stack driving at the driving frequency of 1~600 Hz.When the driving frequency is up to 600 Hz,the maximum root mean square(RMS)error and the maximum relative error of model are 1.13μm and 6.1%respectively,which provides the basis for control of high precision actuator with large displacement.

关 键 词：双压电叠堆 执行器 频率相关 迟滞 参数辨识 

分 类 号：TN384[电子电信—物理电子学] TM282[一般工业技术—材料科学与工程]