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

摘要

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 recentlyproposed 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 ispresented. An example shows the effect of the proposed approach.