Improved delay-partitioning approach to robust stability analysis for discrete-time systems with time-varying delays and randomly occurring parameter uncertainties

O. M. Kwon, M. J. Park, Ju H. Park, S. M. Lee, E. J. Cha

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

SummaryThis paper is concerned with the robust stability problem for uncertain discrete-time systems with interval time-varying delays and randomly occurring parameter uncertainties. By construction of a suitable Lyapunov-Krasovskii functional and utilization of new zero equalities with delay-partitioning approach, improved delay-dependent criteria for the robust stability of the systems are derived in terms of linear matrix inequalities for guaranteeing the asymptotic stability of the concerned systems. The effectiveness and reduction of conservatism of the derived results are demonstrated by three numerical examples.

Original languageEnglish
Pages (from-to)496-511
Number of pages16
JournalOptimal Control Applications and Methods
Volume36
Issue number4
DOIs
StatePublished - 1 Jul 2015

Keywords

  • discrete-time systems
  • interval time-varying delay
  • Lyapunov method
  • randomly occurring uncertainties
  • robust stability

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