衛星搭載用大型展開アンテナの熱設計評価

抄録

A future multi-beam communication satellite requires to develop a large deployable antenna which has a total length of about 9m including two large main-reflectors and a tower. Thermal balance test for a such large sized antenna system is limited by volume of a space simulation chamber. And, the deployment mechanisms can not support the reflectors without damage under gravitational condition on the ground. In order to overcome the above problems, two step thermal design verification method is devised. First, the antenna component thermal analytical model was verified by the each component test at critical test cases. Next, the antenna system thermal analytical model was verified by the antenna system test at typical test cases. The antenna system test is performed by using supporting structures which support the hardpoints of each main-reflector in order to minimize the gravity force to the antenna deployment mechanisms. This paper describes the method of the thermal balance test and the result of thermal design verification for the whole antenna system.