Deployable dynamics research on variable topology satellite hoop truss antenna

The deployable dynamics of the satellite Hoop Truss Deployable Antenna (HTDA) has attracted more and more researchers' attention. However, many previous studies were mainly confined to the deployment dynamics of the hoop truss, which could not reflect the coupling dynamic features of the satellite attitude and deployable arms and HTDA in the deployment and locking processes. The Natural Coordinate Formulation (NCF) could lead to a constant mass matrix for multi-rigid body system, which could help to improve the computational efficiency for the dynamics simulation. By using the NCF and the constraints switching technology, the parameterized variable topology multi-rigid body dynamics system model, including a satellite body, stretching arms and HTDA, was established. The reaction forces and moments at the satellite mass center in the deployment and locking processes were obtained. Finally, some numerical results were validated by the commercial software MSC.ADAMS. The simulation procedures and results provide a useful reference for the practical engineering application.