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质量波动对永磁同步直线电机控制器的影响及其补偿

, PP. 67-74

Keywords: 质量估计,模型波动,模型补偿,干扰观测器,零相位跟踪控制器,直线电机

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Abstract:

在直线电机进给系统中,运动质量的波动是最主要的模型参数波动。基于将干扰观测器和零相位跟踪控制器与PID相结合的控制器结构,分析了质量波动对位置闭环带宽的影响,通过分析可知质量增大会降低位置带宽,破坏位置闭环的零相位误差特性,降低位置跟踪性能。为了补偿质量波动的影响,提出一种基于质量估计和模型补偿的控制器结构。质量估计采用模型参考自适应方法,能够准确及时地估计出质量,稳定后误差不超过3.5%。模型补偿包括质量波动补偿和电流前馈,可使实际模型与设定模型保持一致,补偿了质量波动对位置闭环带宽的影响,保持了控制器的跟踪性能。实验结果验证了该方法的有效性。

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