Fig. 6. Configuration of 2-D array on board a free flyer (a). logical step in the application of the geometry of the polyhedral surface in connection with space technology. Since then, studies on a two-dimensionally deployable array system and relating studies have been made at ISAS. The latest are structural design, the mechanics of deployable masts, the mechanics of 2D-arrays and vibration and control of the array. Figures 6 and 7 show the typical 2D-array systems. Figure 6 represents the case where the blanket is supported by the rim masts. Tension wires are used for stretching the blanket to the rim mast. Figure 7 represents the case where the blanket is supported by radially arranged masts. 3. 2-D ARRAY SYSTEMS Subsystems The 2-D array sysem primarily consists of a large blanket which is subjected to
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