Abstract
Aiming at the development needs of large-scale, modular and on-orbit assembly of satellite antenna, a hexagonal prism modular truss deployable antenna structure with strong topology and good adaptability is proposed. The structure composition and deployment principle of the antenna are expounded. In order to improve the stiffness of the configuration antenna, two types of tension cable configurations are proposed based on the structural characteristics of the hexagonal prism module. Firstly, the static analysis model of the antenna deployment state is established based on the node method, and the mechanical influence relationship between the tension cable and the antenna beams is established, and the value range of pretightening force of the tension cable is derived. Secondly, based on the coordinates of the key nodes of the antenna structure, the dynamic analysis model of the three-layer 19-module antenna support structure is established. Finally, by comparing and analyzing the dynamic characteristics of no cable, cross tension cable and parallel tension cable, the influence of tension cable configuration on antenna stiffness is verified. The analysis results show that the overall stiffness of the antenna support structure can be increased by more than 2.6 times by the two tension cable configurations, and the parallel tension cable is more indigenous to the increase of the antenna stiffness.
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