Observer design and fault diagnosis for state-retarded dynamical systems

Document Type

Article

Publication Date

1-1-1998

Publication Title

Automatica

Volume

34

Issue

2

First Page

217

Keywords

Fault detection, Fault diagnosis, Fault identification, Lyapunov stability, Observers, Razumikhin theorem, Time delay estimation

Last Page

227

Abstract

In this paper, we propose a reduced-order observer, for state estimation in a class of state-delayed dynamical systems driven by known as well as unknown inputs. Conditions for existence of the proposed observer, plus the stability and convergence proof for the observer based on the Razumikhin theorem are given. Additionally, the proposed observer is utilized in an analytical-redundancy-based approach for sensor and actuator failure detection problem in the same class of time delay dynamical systems. Finally, the applicability and effectiveness of the proposed FDI scheme is illustrated through numerical examples. © 1998 Elsevier Science Ltd. All rights reserved.

DOI

10.1016/S0005-1098(97)00175-1

ISSN

00051098

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