Brief paper: Mode-dependent H∞ filtering for discrete-time Markovian jump linear systems with partly unknown transition probabilities

  • Authors:
  • Lixian Zhang;El-Kébir Boukas

  • Affiliations:
  • Space Control and Inertial Technology Center, Harbin Institute of Technology, Harbin, 150001, PR China;Department of Mechanical Engineering, ícole Polytechnique de Montréal, P.O. Box 6079, Station Centre-ville, Montréal (Québec), Canada, H3C 3A7

  • Venue:
  • Automatica (Journal of IFAC)
  • Year:
  • 2009

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Abstract

In this paper, the problem of H"~ filtering for a class of discrete-time Markovian jump linear systems (MJLS) with partly unknown transition probabilities is investigated. The considered systems are more general, which cover the MJLS with completely known and completely unknown transition probabilities as two special cases. A mode-dependent full-order filter is constructed and the bounded real lemma (BRL) for the resulting filtering error system is derived via LMI formulation. Then, an improved version of the BRL is further given by introducing additional slack matrix variables to eliminate the cross coupling between system matrices and Lyapunov matrices among different operation modes. Finally, the existence criterion of the desired filter is obtained such that the corresponding filtering error system is stochastically stable with a guaranteed H"~ performance index. A numerical example is presented to illustrate the effectiveness and potential of the developed theoretical results.