Due to unforeseen circumstances and naturally occurring faults, it is desired that an on-board fault-diagnosis system of a space vehicle be capable of detecting, isolating, identifying or classifying faults in the system. In this paper, a novel approach is proposed which strengthens existing efficient fault-detection mechanisms with an additional ability to classify different types of faults to effectively determine potential failure causes in a subsystem. This extra capability ensures a quick and efficient recovery/reconfiguration from disruptions. Our developed diagnosis/analysis procedure exploits a widely used qualitative technique called fault-tree analysis, as a diagnostic aid, for failure analysis in the attitude control subsystem (ACS) of a spacecraft. Constructed fault-trees have been able to represent combinations of events leading to different failures resulting due to artificially injected faults in a MATLAB-Simulink model of the ACS. It is important to emphasize that proposed technique has potentials for being integrated in an on-board health monitoring and diagnosis tool for space vehicles.


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    Title :

    A novel fault-tree approach for identifying potential causes of satellite reaction wheel failure


    Contributors:
    Barua, A. (author) / Sinha, P. (author) / Khorasani, K. (author) / Tafazoli, S. (author)


    Publication date :

    2005


    Size :

    6 Seiten, 20 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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