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Robust fault detection for a class of nonlinear network control system with communication delay

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3 Author(s)
Ai Qiangyu ; Coll. of Automation Engineering, Nanjing Univ. of Aeronautics and Astronautics, Nanjing 210016, P. R. China ; Liu Chunsheng ; Jiang Bin

To investigate a class of nonlinear network control system, a robust fault diagnosis method is presented based on the robust state observer. To access the objective that the designed robust filter is maximally tolerant to disturbances and sensitive to fault, the robustness and stability properties of the fault diagnosis scheme are established rigorously. Using the residual vector, a fault tolerant controller is established in order to guarantee the stability of the closed-loop system, and the controller law can be obtained by solving a set of linear matrix inequalities. Then, some relevant sufficient conditions for the existence of a solution are given by applying Lyapunov stability theory. Finally, a simulation example is performed to show the effectiveness of the proposed approach.

Published in:

Journal of Systems Engineering and Electronics  (Volume:20 ,  Issue: 5 )