Robust Redundancy Relations for Fault Diagnosis in Nonlinear Descriptor Systems

Alexey Shumsky and Alexey Zhirabok


Fault detection and isolation, Descriptor sysyems, Redundancy relations, Robustness, Model transformation, Differential geometric tools


The problem of fault diagnosis in nonlinear descriptor systems is studied within the scope of analytical redundancy concept. Solution of the problem assumes the checking redundancy relations existing among measured system inputs and outputs. A novel method is proposed for constructing robust redundancy relations on the base of system models described by differential-algebraic equations with polynomial functions whose coefficients may be unknown.

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