The robustness properties of collocated 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 in the large when: (1) unmodeled linear time-invariant dynamics (such as sensors/actuators) are present, provided that the phase angle of such dynamics is between -90 deg and 90 deg; (2) time-varying or invariant nonlinearities lying in the first and the third quadrant (i.e., belonging to the /0, infinity/ sector) are present; or (3) sector-type nonlinearities following first-order stable dynamics are present in the feedback loop.


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    Titel :

    Robustness of velocity feedback controllers for flexible spacecraft


    Beteiligte:
    Joshi, S. M. (Autor:in)


    Erscheinungsdatum :

    01.01.1985



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch