Research on the Topological Characteristics of Truss Structure for Large Space Modular Deployable Truss Antenna

In order to meet the development requirements of the large-scale space deployable antenna, the analysis and research on the topological characteristics of truss structure for modular deployable truss antenna are carried out, and the space equal envelope circle method is proposed. According to the general requirements of the working surface configuration of the deployable antenna, the structural composition and characteristics of the module are analyzed, and the geometric relationship between the number of envelope circles and the number of module layers and the total number of modules is established. Based on the basic theories of differential geometry and robotics, the geometric models of the central layer envelope circle, the second layer envelope circle and the third layer envelope circle are established respectively. The space geometry model of deployable antenna structure is constructed to meet the three-layer topology requirements. Finally, a numerical example is used to verify the geometric model, and the correctness of the model is proved. The topological method of deployable antenna structure proposed in this paper provides reference for the research of basic theory of deployable antenna and large-scale engineering application.