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An LMI approach to minimum sensitivity analysis with application to fault detection. (English) Zbl 1087.93019
Summary: This paper systematically studies the minimum input sensitivity analysis problem. The lowest level of sensitivity of system outputs to system inputs is defined as an \(\mathcal H\) index. A full characterization of the \(\mathcal H\) index is given, first, in terms of matrix equalities and inequalities, and then in terms of linear matrix inequalities (LMIs), as a dual of the Bounded Real Lemma. A related problem of input observability is also studied, with new necessary and sufficient conditions given, which are necessary for a fault detection system to have a nonzero worst-case fault sensitivity. The above results are applied to the problem of fault detection filter analysis, with numerical examples given to show the effectiveness of the proposed approaches.

93B35 Sensitivity (robustness)
93B36 \(H^\infty\)-control
Full Text: DOI
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