H∞ filtering of networked discrete-time systems with random packet losses

  • Authors:

  • Wen-An Zhang;Li Yu;Hongbo Song

  • Affiliations:

  • Department of Automation, Zhejiang University of Technology, Hangzhou 310032, PR China and Zhejiang Provincial United Key Laboratory of Embedded Systems, Hangzhou 310032, PR China;Department of Automation, Zhejiang University of Technology, Hangzhou 310032, PR China and Zhejiang Provincial United Key Laboratory of Embedded Systems, Hangzhou 310032, PR China;Department of Automation, Zhejiang University of Technology, Hangzhou 310032, PR China and Zhejiang Provincial United Key Laboratory of Embedded Systems, Hangzhou 310032, PR China

  • Venue:
  • Information Sciences: an International Journal
  • Year:
  • 2009

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Abstract

This paper studies the H"~ filtering problem for networked discrete-time systems with random packet losses. The general multiple-input-multiple-output (MIMO) filtering system is considered. The multiple measurements are transmitted to the remote filter via distinct communication channels, and each measurement loss process is described by a two-state Markov chain. Both the mode-independent and the mode-dependent filters are considered, and the resulting filtering error system is modelled as a discrete-time Markovian system with multiple modes. A necessary and sufficient condition is derived for the filtering error system to be mean-square exponentially stable and achieve a prescribed H"~ noise attenuation performance. The obtained condition implicitly establishes a relation between the packet loss probability and two parameters, namely, the exponential decay rate of the filtering error system and the H"~ noise attenuation level. A convex optimization problem is formulated to design the desired filters with minimized H"~ noise attenuation level bound. Finally, an illustrative example is given to show the effectiveness of the proposed results.