A novel Lyapunov function for a non-weighted L2 gain of asynchronously switched linear systems

Shuai Yuan, Lixian Zhang, Bart De Schutter, Simone Baldi

Research output: Contribution to journalArticleScientificpeer-review

48 Citations (Scopus)
40 Downloads (Pure)

Abstract

In this paper, a novel Lyapunov function is proposed to study switched linear systems with a switching delay between activation of system modes and activation of candidate controller modes. The novelty consists in continuity of the Lyapunov function at the switching instants and discontinuity when the system modes and controller modes are matched. This structure is exploited to construct a time-varying Lyapunov function that is non-increasing at time instants of discontinuity. Stability criteria based on the novel Lyapunov function are developed to guarantee global asymptotic stability in the noiseless case. Most importantly, when exogenous disturbances are considered, the proposed Lyapunov function can be used to guarantee a finite non-weighted L2 gain for asynchronously switched systems, for which Lyapunov functions proposed in literature are inconclusive. A numerical example illustrates the effectiveness of the proposed method.

Original languageEnglish
Pages (from-to)310-317
JournalAutomatica
Volume87
DOIs
Publication statusPublished - 2018

Keywords

  • Asynchronously switched linear systems
  • Dwell time
  • Lyapunov method
  • Non-weighted L gain

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