Sliding mode observers for fault identification in linear systems not satisfying matching and minimum phase conditions

The paper studies the fault identification problem for linear control systems under the unmatched disturbances. A novel approach to the construction of a sliding mode observer is proposed for systems that do not satisfy common conditions required for fault estimation, in particular matching conditio...

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Bibliographic Details
Published in:Archives of control sciences 2021-01, Vol.31 (2), p.253-266
Main Authors: Zhirabok, Alexey, Zuev, Alexander, Filaretov, Vladimir, Shumsky, Alexey
Format: Article
Language:English
Subjects:
disturbances
Fault diagnosis
faults
Identification
Linear control
Linear systems
Phase matching
Reduced order models
Sliding mode control
sliding mode observers
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Summary:The paper studies the fault identification problem for linear control systems under the unmatched disturbances. A novel approach to the construction of a sliding mode observer is proposed for systems that do not satisfy common conditions required for fault estimation, in particular matching condition, minimum phase condition, and detectability condition. The suggested approach is based on the reduced order model of the original system. This allows to reduce complexity of sliding mode observer and relax the limitations imposed on the original system.
ISSN:1230-2384
2300-2611
DOI:10.24425/acs.2021.137417