Design and analysis of spacecraft antenna reflectors is a technically challenging task requiring consideration on many functional disciplines and associated interdisciplinary coupling. The accurate prediction of RF performance deterioration caused by thermal distortion of an antenna system require a series of sophisticated and time-consuming thermal, structural and RF performance analysis techniques. In addition, today the need to reduce design time, cost, and structure weight while improve product performance and reliability has become more and more important in the design of spacecraft. Therefore, it is essential to employ the integrated design and analysis technique and optimization method in the design of spacecraft antenna reflectors. This paper discusses interdisciplinary design and analysis techniques and optimization methodology of antenna reflectors. An implementation scheme of an integrated optimization-based design and analysis system of spacecraft antenna reflectors is described. This system is based on the CAD and CAE software widely used in CAST. It incorporates antenna reflectors structures geometry modeling, finite element modeling, thermal analysis, structural analysis, RF performance analysis and optimization techniques in an integrated environment. In this system, to eliminate modeling disparities between different disciplines and save engineering time, the same finite element model and same finite element analysis software(MSC/NASTRAN) are used in thermal analysis, structural analysis and optimization.
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