Publication

Actuator-fault detection and isolation based on set-theoretic approaches

Journal Article (2014)

Journal

Journal of Process Control

Pages

947-956

Volume

24

Number

6

Doc link

http://dx.doi.org/10.1016/j.jprocont.2014.04.016

File

Download the digital copy of the doc pdf document

Authors

Abstract

In this paper, an actuator-fault detection and isolation (FDI) approach is proposed. The FDI scheme is based on a bank of interval observers, each of which is designed to match a healthy or faulty system mode. To ensure reliable FDI for all considered faults, a collection of invariant set-based FDI conditions are established for the proposed technique. Under the guaranteed FDI conditions, all the considered faults can be detected and isolated during the transition induced by fault occurrences. Comparing with the existing set-based FDI approaches, the advantage of the proposed technique consists in that it combines the advantages of interval observers in the transient-state functioning and the advantages of invariant ses in the steady-state functioning. This paper is completed with the study of a continuous stirred-tank reactor (CSTR), which illustrates the effectiveness of the proposed method.

Categories

automation, control theory, observability.

Author keywords

interval observers, invariant sets, fault diagnosis, fault isolation, CSTR

Scientific reference

F. Xu, V. Puig, C. Ocampo-Martínez, F. Stoican and S. Olaru. Actuator-fault detection and isolation based on set-theoretic approaches. Journal of Process Control, 24(6): 947-956, 2014.