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Robust design of feedback feed-forward iterative learning control based on 2D system theory for linear uncertain systems

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  • Zhifu Li
  • Yueming Hu
  • Di Li

Abstract

For a class of linear discrete-time uncertain systems, a feedback feed-forward iterative learning control (ILC) scheme is proposed, which is comprised of an iterative learning controller and two current iteration feedback controllers. The iterative learning controller is used to improve the performance along the iteration direction and the feedback controllers are used to improve the performance along the time direction. First of all, the uncertain feedback feed-forward ILC system is presented by an uncertain two-dimensional Roesser model system. Then, two robust control schemes are proposed. One can ensure that the feedback feed-forward ILC system is bounded-input bounded-output stable along time direction, and the other can ensure that the feedback feed-forward ILC system is asymptotically stable along time direction. Both schemes can guarantee the system is robust monotonically convergent along the iteration direction. Third, the robust convergent sufficient conditions are given, which contains a linear matrix inequality (LMI). Moreover, the LMI can be used to determine the gain matrix of the feedback feed-forward iterative learning controller. Finally, the simulation results are presented to demonstrate the effectiveness of the proposed schemes.

Suggested Citation

  • Zhifu Li & Yueming Hu & Di Li, 2016. "Robust design of feedback feed-forward iterative learning control based on 2D system theory for linear uncertain systems," International Journal of Systems Science, Taylor & Francis Journals, vol. 47(11), pages 2620-2631, August.
    • Handle: RePEc:taf:tsysxx:v:47:y:2016:i:11:p:2620-2631
    DOI: 10.1080/00207721.2015.1005724
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