Self-Deployable Geometries for Space Applications

Abstract

Variable-geometry structures are useful in aerospace applications since they are adaptable, from a compact configuration (launch phase) to a spread geometry (operational phase). They may also benefit from the use of flexible joints, which store elastic energy for automatic deployment. Following the development of a self-deploying antenna frame structure with scissors, we propose in this article the geometrical configuration of a new kind of structure, simpler and lighter, minimizing mechanical joints between elements. This topology can form a circular plane or a three-dimensional structure when partially opened. The applications concern auto-tensioning structures such as meshed space antenna, deorbiting sails and also solar panels support structures. KEYWORDSSelf-deployable structure, static equilibrium, numerical simulation, analytical model, sails, 2 rigid structure.

New three-dimensional network concept for deployable space antennas

“…As seen (Fig. 31), the first mode is a flexional mode, corresponding to the first mode of the ring, as described by Bettini [6].…”

“…The vibratory environment of the satellite is a major constraining element for space structures. Studies carried out [6] showed that the frame was perfectly in line with the specifications, that is to say, greater than 1Hz to prevent interaction with the Attitude Control System of the Satellite. Due to side effects, the standard pyramidal network contains solid mechanisms at the periphery (Fig.…”

Novel Surface Design of Deployable Reflector Antenna Based on Polar Scissor Structures

“…However, considering the size limitation, if the top ring has too many aliquots, its rod length will be significantly short, which will affect the deployment process. In this paper, we divide the bottom (16) x If the coordinate position of S 1 is determined, the rod length of the bottom ring can be uniquely determined by the similarity of triangles formula: (17) cos…”

“…The antenna of EGS (Experimental Geodetic Payload) sponsored by NASDA (The National Space Development Agency) is a scissor antenna consisting of a scissor-shaped circular support truss and a rib with tensioned film radiating from a central hub [16]. Bettini et al [17] proposed a new lightweight structure based on the truss structure of a self-expanding scissor antenna with minimal mechanical connections. Gao et al applied the scissor mechanism in robotics and designed a deployable manipulator for grasping objects with movement bifurcation [18].…”