Active Fault Diagnosis by Controller Modification

Jakob Stoustrup, Henrik Niemann

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19 Citationer (Scopus)
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Resumé

Two active fault diagnosis methods for additive or parametric faults are proposed. Both methods are based on controller reconfiguration rather than on requiring an exogenous excitation signal, as it is otherwise common in active fault diagnosis. For the first method, it is assumed that the system considered is controlled by an observer-based controller. The method is then based on a number of alternate observers, each designed to be sensitive to one or more additive faults. Periodically, the observer part of the controller is changed into the sequence of fault sensitive observers. This is done in a way that guarantees the continuity of transition and global stability using a recent result on observer parameterization. An illustrative example inspired by a field study of a drag racing vehicle is given. For the second method, an active fault diagnosis method for parametric faults is proposed. The method periodically adds a term to the controller that for a short period of time renders the system unstable if a fault has occurred, which facilitates rapid fault detection. An illustrative example is given.
OriginalsprogEngelsk
TidsskriftInternational Journal of Systems Science
Vol/bind41
Udgave nummer8
Sider (fra-til)925-936
ISSN0020-7721
DOI
StatusUdgivet - aug. 2010

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Fault Diagnosis
Failure analysis
Controller
Controllers
Observer
Fault
Parameterization
Fault detection
Drag
Field Study
Fault Detection
Reconfiguration
Global Stability
Period of time
Alternate
Excitation
Unstable
Term

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Active Fault Diagnosis by Controller Modification. / Stoustrup, Jakob; Niemann, Henrik.

I: International Journal of Systems Science, Bind 41, Nr. 8, 08.2010, s. 925-936.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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