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Fault Detection For Networked Control Systems With Signal-to-Noise Ratio Constrained Channels

Posted on:2015-01-13Degree:MasterType:Thesis
Country:ChinaCandidate:F M GuoFull Text:PDF
GTID:2268330428972645Subject:Control theory and control engineering
Abstract/Summary:PDF Full Text Request
In this paper, the fault detection problem of Networked Control Systems with Signal-to-Noise Ratio constrained multiple channels is studied. Firstly, a linear discrete-time model with additive white Gaussian noise channels is established, and assume that every Signal-to-Noise Ratio constrained channel is independent of each other; a residual generation based on system model is designed to guarantee the best trade-off between sensitivity to fault and robustness to system disturbance as well as channel noises, and the gain matrixes are calculated by a H∞/H∞performance index; then a norm-based residual evaluation function is proposed, the principle of an on-line threshold is illustrated and its computing method is given by Bounded Real Lemma; the false alarm rate of designed threshold can be computed with the assistance of Chebyshev’s inequality; Based on the above fault detection method, the fault detection problem of Networked Control System with a logarithmic quantizer is also studied, and achieve some good research results, thus realize the promotion of the fault detection method in the quantized feedback control.
Keywords/Search Tags:Networked Control Systems, fault detection, Signal-to-Noise Ratio, logarithmic quantizer
PDF Full Text Request
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