Robust Fault Detection in Descriptor Linear Systems Via Generalised Unknown Input Observers

Abstract A new parametric approach for robust fault detection in descriptor linear multivariable systems with unknown disturbances is proposed. The residual is generated using a full-order generalised state observer, which is designed based on a recently proposed parametric eigenstructure assignment approach. By establishing a condition for robust fault detection in terms of the observer eigenvectors, a simple algorithm for robust fault detection in descriptor linear systems via unknown observers is presented. An example shows the effect of the proposed approach.

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