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.

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