超磁致伸缩执行器磁滞非线性建模与控制

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。

HYSTERESIS NONLINEARITY MODELING AND CONTROL OF GIANT MAGNETOSTRICTIVE ACTUATOR

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.