Transient performance for discrete-time singular systems with actuators saturation via composite nonlinear feedback control

Authors

  • Yu Feng,

    Corresponding author
    1. Department of Electrical and Computer Engineering, University of Windsor, Windsor, ON N9B 3P4, Canada
    • Correspondence to: Yu Feng, Department of Electrical and Computer Engineering, University of Windsor, 401 Sunset Avenue, Windsor, ON N9B 3P4, Canada.

      E-mail: yufeng@uwindsor.ca

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  • Daniel W.C. Ho

    1. Department of Mathematics, City University of Hong Kong, Kowloon Tong, Hong Kong
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  • This article was published online on 29 November 2012. This notice is included in the online and print versions to indicate that both have been corrected on 14 November 2013 to reflect the corresponding author's current address.

SUMMARY

This paper is concerned with the transient performance improvement in tracking control problems for linear multivariable discrete-time singular systems subject to actuators saturation. A composite nonlinear feedback control strategy is considered, and the resulting controller consists of a linear feedback law and a nonlinear feedback law without any switching element. The nonlinear term leads to a varying damping ratio of the closed-loop system and yields a small overshoot as the output approaches the target reference, whereas the linear component is designed to achieve a quick response of the closed-loop system. Two composite nonlinear feedback control laws by both state feedback and measurement output feedback are addressed. An illustrative example is included to show the validity of the obtained results. Copyright © 2012 John Wiley & Sons, Ltd.

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