Journal article

Zonotopic fault detection observer for discrete-time descriptor systems considering − fault sensitivity

Y Wang, V Puig, G Cembrano, Y Zhao

International Journal of Systems Science | Published : 2021

Abstract

This paper addresses a zonotopic fault detection (FD) observer for discrete-time descriptor systems subject to additive actuator faults. The considered descriptor systems are also perturbed by unknown-but-bounded uncertainties including state disturbances and measurement noise. Under a set-based framework, the effects of uncertainties and faults are separated into two state zonotopes. Based on this decomposition, the FD observer gain is designed to be robust against uncertainties and meanwhile sensitive to faults based on a (Formula presented.) index in a finite-frequency domain. Then, two linear matrix inequality (LMI) conditions are obtained to design an observer that achieves robustness a..

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