A three-dimensional rest-to-rest attitude maneuver of flexible spacecraft equipped with on-off reaction jets is studied. Equations of motion of the spacecraft are developed by using Lagrangian formulation. The finite element method is used to discretize elastic deformations of a particular model of satellite with flexible solar panels by modelling the panels as flat plate structures in bending. Under unshaped inputs, the maneuvers induce an undesirable motion of the satellite as well as vibration of the solar panels. Time-optimal and fuel-efficient input shapers are then applied to reduce the residual oscillation of its motion at several natural frequencies in order to get an expected pointing precision of the satellite. Once the shaped inputs are given to the satellite, the performance improves significantly. Results indicate that the fuel-efficient shaped inputs give smaller maximum deflections of flexible members compared with the time-optimal ones.


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    Titel :

    Controlling the attitude maneuvers of flexible spacecraft by using time-optimal/fuel-efficient shaped inputs


    Weitere Titelangaben:

    Die Positionsregelung von flexiblen Satelliten mit zeit- und energieoptimalen Verfahren


    Beteiligte:
    Parman, S. (Autor:in) / Koguchi, H. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1999


    Format / Umfang :

    21 Seiten, 9 Bilder, 2 Tabellen, 15 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





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