Jiles-Atherton模型的超磁致 伸缩驱动器磁滞补偿控制

研究了磁滞补偿控制的方法,建立了基于Jiles-Atherton模型的磁滞补偿控制系统。介绍了Jiles-Atherton磁滞模型的主要思想及其主要参数,对该模型反向运动时磁化强度变化与磁场强度变化的对应关系进行了分析,并在此基础上,提出了利用磁滞环的宽度,通过重新给定反向起始点的迭代初值,实现磁滞补偿的方法。实验结果表明:对于阶跃响应,采用磁滞补偿时没有延迟,且达到稳态时间比不进行磁滞补偿时缩短12 ms;对于正弦响应,采用磁滞补偿时没有延迟,且均方误差比不进行磁滞补偿时提高了0.19 μm,能有效消除磁滞的影响,提高定位精度。

Hysteresis compensation of giant magnetostrictive actuator based on Jiles-Atherton model

The hysteresis compensation method is studied.A control system is established based on Jiles-Atherton hysteresis model and its main parameters are introduced. Then, according to Jiles-Atherton hysteresis model, the variation relation between magnetization and field intensity is analyzed. Finally, based on above analysis, a hysteresis compensation method using the width of hysteresis ring to recalculate the initial value for recursive algorithm at turning point is proposed. The experiment results indicate that,comparing with a actuator without hysteresis compensation, there is no time delay in proposed system and the settled time is 12 ms reduced for step response, Also, there is no time delay and the MSE is 0.19 μm improved for sine wave tracking, which shows that the compensation method can overcome the hysteresis effect and improve positioning precision effectively.