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Observer-based approach to fault detection and isolation for nonlinear systems. (English) Zbl 0956.93005
Summary: The design of a residual generator for fault detection and isolation (FDI) in nonlinear systems which are affine in the control signals and in the failure modes is studied. First, the problem statement used for linear systems is extended, and a set of sufficient conditions for the existence of a solution is given. Next, circumstances under which high-gain observers for uniformly observable systems can be used in the synthesis of the residual generator are provided.
MSC:
93B07Observability
90B25Reliability, availability, maintenance, inspection, etc. (optimization)
93C10Nonlinear control systems