压电致动器迟滞特性的多项式拟合建模  

Polynomial Fitting Modeling of the Piezoelectric Actuator Hysteresis Characteristics

作　　者：王建红[1] 林健[1] 张建华[1] 陆宝春[2] 

机构地区：[1]南京工程学院自动化学院,江苏南京211167 [2]南京理工大学机械工程学院,江苏南京210094

出　　处：《机床与液压》2015年第19期71-74,77,共5页Machine Tool & Hydraulics

基　　金：江苏省高校自然科学基础研究项目(11KJB510005)

摘　　要：压电致动器具有响应速度快、功耗低、输出力大和定位精度高等优点,但是其迟滞特性给精确的微位移控制带来难度,为实现动静态特性理想的压电致动器控制,必须要针对其迟滞特性建模。对压电致动器的迟滞特性进行实验测试,在此基础上绘制其特性曲线,通过多项式拟合的方式求得满足给定精度下的特征曲线方程,完成对压电致动器迟滞特性的建模。同等输入量条件下,将实验测试结果与模型输出结果进行比较,结果表明:压电致动器静态模型误差均在1%左右,证明了该方法的有效性。The piezoelectric actuator has the advantages of fast respons,lower power and large output force,but it is difficulty to control the precise micro-displacement of the piezoelectric actuator for its hysteresis characteristics,the piezoelectric actuator must be modeled for the hysteresis characteristics to achieve the desired dynamic and static characteristics of control. The hysteresis characteristics of the piezoelectric actuator was tested,the characteristic curve was drawn based on the test,the characteristic curve equation was obtained by polynomial fitting way to satisfy a given accuracy,the model was completed. The experimental results were compared with the model output under the same input condition,the result shows that the static model error of the piezoelectric actuator is about 1%,which proves the effectiveness of the method.

关 键 词：压电致动器 迟滞特性 多项式拟合 精度 

分 类 号：TP273.4[自动化与计算机技术—检测技术与自动化装置]