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Robust H_∞ Fault Diagnosis for Networked Control Systems with Interference and Data Packet Dropout


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Robust H_∞ Fault Diagnosis for Networked Control Systems with Interference and Data Packet Dropout
ZHANG JieBO Yu-mingWU Pan-long
School of Automation,NUST,Nanjing 210094,China
networked control systems data packet dropout interference inputs fault diagnosis robustness
Focusing on a class of networked control systems with unknown interference inputs and packet dropout in sensor data,the robust H∞ state observer is designed to detect them when faults occur in the system.A model and the state observer are constructed for the system,and the observer error equation is kept equivalent to the discrete switched system.Based on Lyapunov stability theory,the sufficient condition of the observer being a robust H∞ state observer and the method to find the observer gain matrix are both given.In order to enhance the robustness and sensitivity,the threshold is selected with solving the minimization problem involving a linear matrix inequality constraint.An illustrative example is given to demonstrate the effectiveness of the proposed method.


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Last Update: 2012-10-12