One of the difficulties encountered when controlling large space structures is that the structural dynamics are not known well enough. If a finite element model of the structure is used to develop the control system, then the typical errors in the mode frequencies and mode shapes that result will lead to a control system that at best does not perform as well a possible and at worst could be unstable. The dilemma is that large space structures can not be built and tested on the ground - one must wait until the structure is designed and built in orbit before reasonable testing may begin. The problems os this 'on-orbit' dynamic testing is discussed here in terms of a phase locked loop adaptive spectrum analyzer that could provide mode frequencies and mode shapes for control design during the initial orbital operations of a large space structure. (DePo)


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    Titel :

    On-orbit testing for large space structures


    Weitere Titelangaben:

    In-Orbit Pruefung grosser Raumstation1n


    Beteiligte:
    Gran, R. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1979


    Format / Umfang :

    4 Seiten, 4 Bilder, 4 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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