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Fault-tolerant Control for Nonlinear Systems with Multiple Intermittent Faults and Time-varying Delays

Liang Cao and Youqing Wang*
International Journal of Control, Automation, and Systems, vol. 16, no. 2, pp.609-621, 2018

Abstract : "This study investigates a new fault-tolerant control method for uncertain nonlinear systems with multiple intermittent faults and time-varying delays. The considered intermittent faults appear in sensors and actuators simultaneously. A Markov chain is used to describe the random occurrence and disappearance of intermittent faults. The uncertain nonlinear system with intermittent faults is augmented as a Markovian jump system. By using H-infinity control theory and linear matrix inequality (LMI), we design fault tolerant controllers to make augmented Markovian jump system work steadily. Several sufficient conditions for stochastic stability with given H-infinity performance index and the existence of output-feedback controllers are derived. The effectiveness of the proposed fault-tolerant method is validated by a continuously stirred tank reactor (CSTR)."

Keyword : Fault tolerant control, H∞ control, intermittent faults, Markov model, time-varying delays.

 
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