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Real-time compensation control of hysteresis based on Prandtl-Ishlinskii operator for GMA
Author(s): 
Pages: 124-130
Year: Issue:  1
Journal: Optics and Precision Engineering

Keyword:  超磁致伸缩驱动器磁滞Prandtl-Ishlinskii模型逆模型实时补偿;
Abstract: 针对超磁致伸缩驱动器(GMA)存在复杂的磁滞非线性易降低系统性能,导致系统不稳定的问题,建立了可以精确描述磁滞现象的模型并提出了合适的驱动控制方法.首先,基于Prandtl-Ishlinskii(PI)模型对GMA磁滞建模,并采用最小均方法(LMS)进行模型参数辨识,模型预测误差为0.0379 μm.接着,通过对PI模型解析求逆进行实时补偿控制,从而有效减小磁滞误差,补偿控制误差为0.309 μm.实验结果证明,PI模型可以精确描述GMA磁滞现象,且具有计算简单,磁滞跟踪能力强的优点.基于该模型的实时磁滞补偿控制方法可以有效减小磁滞误差,提高GMA实时驱动定位控制精度,是实现GMA精密驱动控制的一种有效方法.
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