On nonlinear system diagnosis via high-gain observers: a case study
In this chapter we study the diagnosis problem for a bioreactor process. The solvability of the problem is translated in terms of the observability of the variable which models the failure presence.We obtain an algebraic relation that depends on input, output (u and y respectively) and their time derivatives, which is satisfied by the given fault component. The main ingredient is the construction of a high-gain nonlinear observer which is based upon the multi-output generalized observability canonical form to estimate the fault.
KeywordsFault Detection Nonlinear Observer State Estimation Problem Fault Component Fault Estimator
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