压电陶瓷驱动器的复合控制方法研究  

Research on Composite Control Method of Piezoelectric Actuator

作　　者：李自成[1] 熊轩 王后能[1] 熊涛 LIZi-cheng;XIONG Xuan;WANG Hou-neng;XIONG Tao(School of Electrical and Information Engineering,Wuhan Institute of Technology,Hubei Wuhan 430205,China)

机构地区：[1]武汉工程大学电气信息学院,湖北武汉430205

出　　处：《机械设计与制造》2023年第2期11-14,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金资助项目(51705376);湖北省教育厅重点科研项目(D20161502)。

摘　　要：针对压电陶瓷驱动器中的迟滞非线性特性,提出一种提高压电陶瓷执行器定位精度的复合控制方法。建立了非等间隔阈值的Prandtl-Ishilinskii(PI)迟滞模型,通过自适应差分进化算法进行系统辨识,求取参数并建立逆模型。考虑到压电陶瓷迟滞非线性特性随输入信号频率变化的特点,采用融合PI逆模型前馈控制与滑模控制的复合控制方法用于压电陶瓷的精密驱动。实验结果表明,相比逆模型前馈和PID结合的复合控制方法,采用逆模型前馈和滑模复合控制方法,平均误差下降了0.0300μm,均方根误差下降了0.0346μm,能有效克服压电陶瓷迟滞非线性,提高系统跟踪性能。Aiming at the hysteresis nonlinearity characteristic of piezoelectric actuator,a compound control method is proposed to improve the positioning accuracy of piezoelectric actuator.The Prandtl ishilinskii(PI)hysteresis model with unequal interval threshold is established.The System is identified by adaptive differential evolution algorithm,and the parameters are obtained and the inverse model is established.Considering that the hysteresis nonlinearity characteristic of piezoelectric ceramics vary with the frequency of input signal,a composite control method combining PI inverse model feedforward control and sliding mode control is used for the precise drive of piezoelectric ceramics.The experimental results show that compared with the composite control method of inverse model feedforward and PID,the average error and root mean square error of inverse model feedforward and sliding mode composite control method are reduced by 0.0300μm and 0.0346μm respectively,which can effectively overcome the hysteresis nonlinearity of piezoelectric ceramics and improve the tracking performance of the system.

关 键 词：压电陶瓷驱动器 迟滞非线性 自适应差分进化 前馈控制 复合控制 

分 类 号：TH16[机械工程—机械制造及自动化] TN384[电子电信—物理电子学]