Brief paper: Stability robustness of networked control systems with respect to packet loss

Authors:
Shawn Hu;Wei-Yong Yan
Affiliations:
Department of Electrical and Computer Engineering, Curtin University of Technology, GPO Box U1987, Perth 6845, Australia;Department of Electrical and Computer Engineering, Curtin University of Technology, GPO Box U1987, Perth 6845, Australia
Venue:
Automatica (Journal of IFAC)
Year:
2007

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Abstract

This paper is concerned with stability analysis of discrete-time networked control systems over a communication channel subject to packet loss whose behavior is modeled by an i.i.d Bernoulli process with a packet dropping probability bounded by a constant. A necessary and sufficient condition for stability is obtained. A packet dropping margin is introduced as a measure of stability robustness of a system against packet dropping, and a formula for it is derived. A design method is proposed for achieving a large margin subject to a constraint that the system has a set of prescribed nominal closed-loop poles.