Fault diagnosis in linear systems via sliding mode observers

The problem of fault diagnosis in technical systems described by linear dynamic models is considered. The approach allowing increase robustness of the diagnostic process under disturbances is suggested. The approach includes two stages: (1) synthesis of sliding mode observer, sensitive to the distur...

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Bibliographic Details
Published inInternational journal of control Vol. 94; no. 2; pp. 327 - 335
Main Authors Zhirabok, A. N., Shumsky, A. E., Zuev, A. V.
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 01.02.2021
Taylor & Francis Ltd
Subjects
diagnostic observer
Diagnostic software
Diagnostic systems
Dynamic models
Fault detection
Fault diagnosis
Linear systems
robustness
Sliding mode control
sliding mode observer
Synthesis
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Summary:The problem of fault diagnosis in technical systems described by linear dynamic models is considered. The approach allowing increase robustness of the diagnostic process under disturbances is suggested. The approach includes two stages: (1) synthesis of sliding mode observer, sensitive to the disturbance and invariant with respect to the fault; this observer estimates the value of the disturbance, (2) synthesis of diagnostic observer, sensitive to the fault, using the estimated value of the disturbance giving by the first observer to compensate the effect of the disturbance; this observer provides fault detection. To isolate faults, the complex diagnostic tools are constructed.
ISSN:0020-7179
1366-5820
DOI:10.1080/00207179.2019.1590738