Observer based fault-tolerant control for a class of nonlinear networked control systems. (English) Zbl 1201.93061

Mao, Zehui; Jiang, Bin; Shi, Peng

J. Franklin Inst. 347, No. 6, 940-956 (2010).

Summary: We present a Fault-Tolerant Control (FTC) framework for a class of nonlinear Networked Control Systems (NCSs). Firstly, the plant is transformed into two subsystems with one of them decoupled from the system fault. Then, the nonlinear observer is designed to provide the estimation of unmeasurable state and modelling uncertainty, which are used to construct fault estimation algorithm. Considering the sampling intervals occurred by net, a fault-tolerant control method is proposed for such nonlinear NCSs using the impulsive system techniques. The controller gain and the maximum sampling interval, which make the faulty system stable are given. An example is included to show the efficiency of the proposed method.

MSC:

93C10	Nonlinear systems in control theory
93B07	Observability
93B35	Sensitivity (robustness)

Keywords:

fault-tolerant control; fault estimation; observer; networked control systems

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