The robustness properties of collocated direct velocity feedback controllers used for damping enhancement in large, flexible space structures are investigated. It is proved that the closed-loop system using such controllers is asymptotically stable when: (1) unmodeled linear time-invariant dynamics (such as sensors/actuators) are present, provided that the phase angle of such dynamics is between - 90 and 90 , (2) time-varying or invariant nonlinearities lying in the first and the third quadrant are present, or (3) sector-type nonlinearities following first-order stable dynamics are present in the feedback loop.


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    Title :

    Robustness of velocity feedback controllers for flexible spacecraft


    Additional title:

    Unempfindlichkeit von Geschwindigkeitsreglern fuer flexible Raumfahrzeuge


    Contributors:
    Joshi, S.M. (author)


    Publication date :

    1985


    Size :

    6 Seiten, 11 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English