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基于ZPETC和DOB的直线电机控制器设计及实验研究

, PP. 134-140

Keywords: 直线电机,零相位跟踪控制器,干扰观测器

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Abstract:

直线电机驱动系统中存在的负载力、推力波动等干扰力会引起跟踪误差,降低跟踪性能。干扰观测器可以检测并补偿干扰,有效提高系统的抗干扰能力。前馈控制是提高系统跟踪性能的另一种方法,如直接速度前馈控制器、零相位误差跟踪控制器等,可以有效提高系统带宽,提高跟踪性能。针对直线电机在抗干扰和动态响应方面的需求,该文研究了基于直接速度前馈控制器、零相位跟踪控制器和干扰观测器的直线电机控制方法,并给出实验结果。结果表明,直接速度前馈控制器使位置能够无静地跟踪二阶指令输入,干扰观测器能够很好的抑制推力波动和摩擦力的影响,零相位跟踪控制器能够提高位置闭环带宽,改善跟踪性能,特别是三阶位置指令输入时的跟踪误差。

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