Reaction wheels are main actuators of satellite attitude control systems. If a mechanical failure of one out of four reaction wheels occurs, it should be detected quickly and the controller need be reconfigured to restore three-axis control using healthy reaction wheels. To realize fault tolerant control, a predictive filter is applied to obtain information of states and faults. Considering the actual reaction torques on wheels as unknown inputs, they can be estimated by a predictive filter with states. Based on this algorithm wheel faults can be diagnosed. In this paper, a controller reconfiguration structure using a predictive filter is presented and the usefulness of this method is illustrated by a simulation to a three-axis stable attitude control system of a satellite.


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    Title :

    Controller reconfiguration against reaction wheel failure based on predictive filters


    Contributors:
    Ji Li, (author) / Hong-Yue Zhang, (author)


    Publication date :

    2006-01-01


    Size :

    2845829 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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