An approach to design of large-sized deployable hoop space antenna reflector

Abstract

Amongst the large-sized transformable space antennas, the most attention is currently paid to developing of antennas with hoop-shaped reflectors. The developers are faced with the necessity of looking for optimal design concepts. This paper shows the various concepts of building of the reflectors of the cable-rod scheme, containing a circular load-bearing framework (load-bearing rim) with a deployment drive set on it and the reflecting surface shape-generating structure, assembled into a single construction by the cable and rod elements. The difference between the proposed design concepts of the reflectors is the various structures of the controllable unfolding mechanisms. In the first alternative of the reflector structure, the unfolding process is supported by the cable, which restrains relative displacements of the tips of the initially compressed springs. The second alternative supposes the cable not to be the restraining element, but an active unit of the unfolding mechanism. This paper also describes various alternatives for connection between tension tie cables and the load-bearing rim. It is shown that the alternative of connection of the tension tie cables to the middles of the load-bearing rim edges allows to perform stress analysis of the structure elements and to obtain required characteristics of the spring drive. The numerical calculations for optimal angular position of the deployment drive pulleys holder relative to the sections of the load-bearing rim for the second alternative of the reflector design, which provides the most force effect on shape-generating structure of the reflector, when the knitted mesh fabric is being pulled, are under consideration in this article. The calculations are confirmed by experimental investigations.

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“…Future space missions require large deployable antennas for deep space explorations, satellite communications and earth observations (Li et al , 2010; Huang et al , 2021; Chen et al , 2019). The mesh deployable antenna is an important type of deployable antennas, which consists of supporting frame, front cable net, tie cables and back cable net (Meshkovsky et al , 2021; Tserode et al , 2021). The front cable net of mesh deployable antennas is the working surface, and its shape accuracy determines the working performance of the mesh deployable antenna (Chahat et al , 2016; Sangchap et al , 2020; Sangchap et al , 2020; Tang et al , 2019).…”