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基于反馈线性化的直线电动机伺服平台轨迹跟踪控制研究

, PP. 143-149

Keywords: 直线电动机,位置控制器,轮廓控制器,伺服控制,XY伺服平台

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Abstract:

在非线性曲线轨迹加工时,直接驱动XY伺服平台普遍存在轮廓误差精度差的问题。为提高轮廓误差精度,提出将最优化位置控制与等效误差轮廓控制相结合的复合控制策略。为了保证位置伺服控制器的高精度控制,采用以时间乘以误差绝对值积分(ITAE)为性能指标的最优化控制器设计方法。为了保证精密XY伺服运动平台高精度轮廓加工,轮廓控制器以等效误差量为状态变量,通过反馈线性化的极点配置使等效误差动态稳定,从而减小轨迹轮廓误差。仿真与实验表明,所提出的控制方法有效抑制了端部效应引起的周期性推力波动等扰动,使精密XY伺服运动平台满足高精度轮廓加工的要求。

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