Xiaomei Qi, Chengjin Zhang, and Jason Gu
Fault tolerant control, time-varying and unknown network-induced delay, data packet dropout, Markov chain, switching output-feedback controllers
An output-feedback fault tolerant control problem for networked control system (NCS) with network-induced delay and data packet dropout is investigated. In both sensor-to-controller link and controller-to-actuator link, the total time-varying and unknown network-induced delay can be separated into two parts, that is, one is a constant and the other is a bounded variable. The effect of the network-induced delay is transformed into model uncertainty. The data packet dropout is modelled as two switches that follow a four-state Markov chain. Then a discrete-time Markovian jump uncertain model of NCS with actuator (complete/partial) failure is established. The sufficient and necessary condition for exponential mean square stability is derived. Moreover, a linear matrix inequality approach for designing switching output-feedback controllers are presented. Finally, two numerical examples are presented to illustrate the effectiveness of the proposed method.
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