Structure Analysis And Improvement Of Large Deployable Antenna

With the development of space technology, the research on space large deployable antenna with large diameter, light quality, high package ratio, high reliability has become an important field of aerospace technology. This article mainly focuses on the deployable structure parts of a new type of antenna named hoop and rib deployable antenna.Firstly, the various parts of model are established using UG based on the previous design of the joint and connector in the deployable structure. Then the whole antenna model is assemblied virtually when it is in folded state and deployed state using the assembly module of UG to evaluate the feasibility of the structure scheme. At the same time the antenna prototype is made and the experiments are done. The process of the experiments show that some parts of the structure have flaws.Secondly, this paper analyzes the cause of the problems and insufficiency which ocurred in the process of antenna experiments and does corresponding improvement. It mainly includes axial gap and lateral gap of the joint. Througth analyzing the cause of the problems, some relevant structures are improved and designed particularly. Also the locking structures of joint are perfected or designed. Two types of cable net node structure are designed. Some measures to prevent winding are proposed on the basis of experiment. The hoop and rib connection structure is designed again to reduce the risk of rope to be segmented. A new unfolded driving scheme is proposed according to analyze advantages and disadvantages of torsion spring driving and rope pulling driving. Through all above research, the feasibility and reliability of deployable structure is strengthed.Finally, the above researches are summarized and the existing problems and the next task are put forword.This paper mainly improves some relevant structures on the base of deployable structure experiment to make the antenna more perfect. It provides a valueable reference for further development of hoop and rib deployable antenna.