环形桁架天线展开动力学分析

Deployment Forward Dynamics Analysis of Hoop Truss Antennas

基于Lagrange动力学方程,考虑天线系统动能、索网弹性势能、重力势能及系统耗散能等,建立了环形桁架天线展开过程的动力学模型。根据构建的动力学模型,给定预设驱动,对其进行正动力学分析,对天线的完整展开过程进行仿真分析。扭簧和电机拉动绳索联合驱动实现了天线的展开,研究了扭簧驱动及电机拉动绳索驱动的参数变化对天线展开过程的影响。研究结果可为天线的展开过程提供指导。

Based on the Lagrange dynamics equation,the dynamics model of the hoop truss antennas was established considering the kinetic energy of the system,the elastic potential energy of the cable nets,the gravitational potential energy and the dissipative energy of the system.According to the dynamics model and the predesigned drive sections,forward dynamic analysis was carried out to simulate the complete development processes of the antennas under the real conditions.The torsion spring and the rope pulled by the motors were combined to drive the deployment,and the effects of parameter changes of torsion spring and drive rope on the deployment processes were studied,respectively.The simulation results have great reference significance for the deployment processes of the antennas.