Robust fault estimator design for uncertain networked control systems with random time delays: An ILMI approach

Authors:
Dan Huang;Sing Kiong Nguang
Affiliations:
The Department of Electrical and Computer Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand;The Department of Electrical and Computer Engineering, The University of Auckland, Private Bag 92019, Auckland, New Zealand
Venue:
Information Sciences: an International Journal
Year:
2010

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Abstract

This paper investigates the problem of robust fault estimation for a class of uncertain networked control systems (NCSs) with random communication network-induced delays, which are described by Markov processes. Based on the Lyapunov-Razumikhin method, the existence of a delay-dependent fault estimator is given in terms of the solvability of bilinear matrix inequalities (BMIs). An iterative algorithm is proposed to change this non-convex BMI problem into quasi-convex optimization problems, which can be solved effectively by available mathematical tools. The effectiveness of the proposed design methodology is verified by an internet-based DC motor test rig.