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)


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    On-orbit testing for large space structures


    Additional title:

    In-Orbit Pruefung grosser Raumstation1n


    Contributors:
    Gran, R. (author)

    Published in:

    Publication date :

    1979


    Size :

    4 Seiten, 4 Bilder, 4 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    On orbit testing for large space structures

    GRAN, R. / ROSSI, M. | AIAA | 1979


    On-orbit modal identification of large space structures

    Kim, Hyoung M. / Doiron, H.H. | Tema Archive | 1992


    On orbit damage assessment for large space structures

    Chen, Jay-Chung / Garba, John A. | NTRS | 1987


    On-orbit damage assessment for large space structures

    Chen, Jay-Chung / Garba, John A. | NTRS | 1988


    On-orbit damage assessment for large space structures

    CHEN, JAY-CHUNG / GARBA, JOHN A. | AIAA | 1988