超磁致伸缩执行器磁滞非线性建模与控制  

HYSTERESIS NONLINEARITY MODE- LING AND CONTROL OF GIANT MAGNETOSTRICTIVE ACTUATOR

作　　者：贾振元[1] 王福吉[1] 张菊[1] 郭丽莎[1] 

机构地区：[1]大连理工大学精密与特种加工教育部重点实验室,大连116024

出　　处：《机械工程学报》2005年第7期131-135,共5页Journal of Mechanical Engineering

基　　金：国家自然科学基金(50275021)辽宁省科学技术基金(20032121)资助项目

摘　　要：针对超磁致伸缩执行器的磁滞非线性问题,应用Priesach理论模型建立了执行器的磁滞模型,并根据其逆模型设计了前馈补偿器,同时设计了磁滞模型的自适应算法和动态调整前馈补偿器的参数,最终实现对执行器磁滞非线性进行补偿和控制。仿真和试验结果表明该模型能够很好的描述执行器的磁滞非线性,采用自适应算法有效地改善了执行器输出位移的磁滞非线性,减小了系统的非线性误差,提高了执行器的控制精度。Aiming at the problems on hysteresis nonlinearity of GMM--giant magentostrictive actuator, the hysteresis model of GMM is set up using Priesach theory model. According to its anti-model, the feedforward compensator, adaptive algorithm of hysteresis model and the parameters of feedforward compensator adjusting dynamically are designed, which realizes to compensate and control the hysteresis nonlinearty of GMM finally. The results of simulation and test show that this model can be very good at depicting the hysteresis nonlinearity of GMM, and adopted adaptive algorithm is improved effectively hysteresis nonlinearity of displacement exported by GMM, has reduced the non-linear error of the system and has improved the control precision of GMM.

关 键 词：超磁致伸缩执行器(GMA) 磁滞非线性 PREISACH模型 前馈控制 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]