S1903-2-2 ケーブル構造で構成した衛星搭載用超軽量アンテナ反射鏡面構造の新設計法(宇宙構造・材料(2),社会変革を技術で廻す機械工学)

抄録

The purpose of this study is to establish a new design methodology for lightweight cable-mesh antenna reflectors for the future communication satellites. In this study, we propose a new design methodology for a system of cables. We would design a system of cables stable against a deformation of the supporting structure. When a large deformation is allowed to the supporting structure, the structure can be designed simpler and lighter. Then the lighter and larger antenna reflector can be obtained. To demonstrate our design methodology, we've designed and manufactured "umbrella antenna", whose diameter is 1.4 m. 3D measurement of reflector surface and FEM analysis was performed to estimate surface accuracy and deformation modes. As a result, we found allowable deformation modes (homologous deformation modes) and the minimum requirement of bending stiffness of a supporting structure.