A Simulation Research Method for Large-scale Parallel Truss Deployment Mechanism in Space

In this paper, a large Three Revolute-Prismatic-Spherical (3-RPS) parallel truss expandable mechanism applied in space is taken as the research object, and an effective simplified simulation method is proposed. Firstly, the fundamental frequency of the extension arm is measured according to the fundamental frequency experiment of the extension arm, and the continuum equivalent model parameters are calculated by the vibration equation. To reduce the amount of simulation calculation, the model is calculated according to the dimensional analysis method. A method based on ANSYS and ADAMS is proposed to establish the rigid-flexible coupling dynamics simulation model of the unfolding mechanism and the 1:10 scaling model is simulated. At the end of the paper, the vibration of the load in these two cases is analyzed by taking the simulation results of the two conditions of the lateral external force and the axial torque that may be subjected to the model load during the deployment process.