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LPV Observer-Based Strategy for Rejection of Periodic Disturbances with Time-Varying Frequency

机译：基于LPV观测器的时变频率周期性干扰抑制策略

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摘要

Rejection of periodic disturbances is an important issue in control theory and engineering applications. Conventional strategies like repetitive control and resonant control can deal adequately with this problem but they fail when the frequency of the disturbance varies with time. This paper proposes a Linear Parameter Varying (LPV) resonant observer-based control for periodic signal rejection which is able to deal with the changes in frequency of the disturbance signal. The observer includes, in an embedded way, an internal model of the disturbance that is based on its harmonic decomposition. In this way, the frequency of the disturbance signal constitutes a parameter that can be adjusted according to the variations of the signal. The resulting disturbance estimation is then used by a control law that cancels the periodic disturbance term while controlling a specified tracking task. The proposed scheme lets the control designer address the disturbance estimation and tracking problems separately. Experimental results, on a mechatronic test bed, show that the proposed LPV resonant observer-based control successfully rejects periodic disturbances under varying frequency conditions.
机译：周期性干扰的抑制是控制理论和工程应用中的重要问题。诸如重复控制和共振控制之类的常规策略可以充分解决此问题，但是当干扰的频率随时间变化时，它们将失败。本文提出了一种基于线性参数变化（LPV）共振观测器的周期性信号抑制控制，该控制能够处理干扰信号的频率变化。观察者以嵌入式方式包括基于干扰的谐波分解的内部模型。这样，干扰信号的频率构成了可以根据信号的变化来调整的参数。然后由控制定律使用所得的扰动估计，该定律在控制指定的跟踪任务时取消周期性扰动项。所提出的方案使控制设计者可以分别解决干扰估计和跟踪问题。在机电测试台上的实验结果表明，所提出的基于LPV共振观测器的控制成功地拒绝了在频率变化条件下的周期性干扰。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第9期|380609.1-380609.9|共9页
  • 作者

    Ramos G. A.; Costa-Castello Ramon; Cortes-Romero John;

  • 作者单位

    Univ Nacl Colombia, Dept Ingn Elect & Elect, Bogota, Colombia.;

    Univ Politecn Cataluna, Inst Org & Control Sistemes Ind, E-08028 Barcelona, Spain.;

    Univ Nacl Colombia, Dept Ingn Elect & Elect, Bogota, Colombia.;

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