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  • A Construction Methodology of the large solar Array System of a Solar Power Satellite

    Paper ID



    • M. Shigehara
    • A. Ohtaka


    Dept, of Aerospace Engineering, Tokyo Metropolitan Institute of Technology






    A construction methodology of the large solar array system is investigated, assuming the SPS 2000 model of ISAS, the experimental model for the future Solar Power Satellite in Japan. The structure elements such as trusses, beams and solar arrays are transported from the ground 10 times by using a rocket. First, the basic module is assembled and then the subsequent modules are attached towards N-S direction. The construction sequence how to form this basic module has already been examined under the gravity gradient environment. This paper discusses how to extend the flexible solar array sheets over this module. First, the dynamic model when extending an array is developed, by including the moment of inertia and angular momentum change during the extension. Then, the dynamic behaviors during extension are examined. When an extension is made by one array by one, the momentum by extending array and the moment of inertia change induce larger oscillation around all three axes of the basic module. Thus the method to minimize these changes by extending the pair of the arrays simultaneously is studied for reducing the attitude vibration. In conclusion, a method of extending two arrays simultaneously is judged desirable for a practical application.