变拓扑卫星环形桁架天线展开动力学研究  

Deployable Dynamics Research on Variable Topology Satellite Hoop Truss Antenna

作　　者：田强[1] 刘铖[1] 刘丽坤[2] 李新刚[2] 

机构地区：[1]北京理工大学宇航学院力学系飞行器动力学与控制教育部重点实验室,北京100081 [2]中国空间技术研究院通信卫星事业部,北京100094

出　　处：《系统仿真学报》2013年第6期1351-1358,共8页Journal of System Simulation

基　　金：国家自然科学基金(11002022);总装基金(9140A20020610HT0506)

摘　　要：卫星环形桁架天线展开动力学问题一直被众多学者所关注。但是,以前的相关研究主要局限于桁架天线本身的展开动力学问题,因此无法得到伸展臂与桁架天线展开、锁定过程中与卫星本体姿态的耦合动力学特性。鉴于多刚体系统动力学理论中的自然坐标方法能得到常数系统质量矩阵,便于高效计算。采用自然坐标方法利用约束切换技术建立了变拓扑星体-伸展臂-环形桁架天线的参数化多刚体系统动力学模型,进行了系统的展开动力学仿真研究,获得了伸展臂与桁架展开、锁死过程中对星体质心的反力变化规律。部分仿真结果采用商业软件MSC.ADAMS进行了验证。仿真流程及结果可为实际工程应用提供参考。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.

关 键 词：变拓扑 伸展臂 桁架 多刚体动力学仿真 自然坐标 

分 类 号：O345[理学—固体力学]