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Robust stabilisation of time-varying delay systems with probabilistic uncertainties

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  • Ning Jiang
  • Junlin Xiong
  • James Lam

Abstract

For robust stabilisation of time-varying delay systems, only sufficient conditions are available to date. A natural question is as follows: if the existing sufficient conditions are not satisfied, and hence no controllers can be found, what can one do to improve the stability performance of time-varying delay systems? This question is addressed in this paper when there is a probabilistic structure on the parameter uncertainty set. A randomised algorithm is proposed to design a state-feedback controller, which stabilises the system over the uncertainty domain in a probabilistic sense. The capability of the designed controller is quantified by the probability of stability of the resulting closed-loop system. The accuracy of the solution obtained from the randomised algorithm is also analysed. Finally, numerical examples are used to illustrate the effectiveness and advantages of the developed controller design approach.

Suggested Citation

  • Ning Jiang & Junlin Xiong & James Lam, 2016. "Robust stabilisation of time-varying delay systems with probabilistic uncertainties," International Journal of Systems Science, Taylor & Francis Journals, vol. 47(12), pages 3016-3026, September.
    • Handle: RePEc:taf:tsysxx:v:47:y:2016:i:12:p:3016-3026
    DOI: 10.1080/00207721.2015.1063173
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