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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。
Satellite trussed truss antenna dynamics has been the concern of many scholars. However, the previous related researches mainly focus on the truss antenna’s dynamic problem of launching. Therefore, it is impossible to get the coupling dynamics between the deployed arm and the truss antenna and the attitude of the satellite body during locking. In view of the natural coordinate method in multi-body system dynamics theory, a constant system mass matrix can be obtained, which makes it easy to calculate efficiently. Using the natural coordinate method, a parametric rigid body multi-body system dynamics model with variable topological astral-extensible arm-circular truss antenna was established by constrained switching technique. The system dynamics simulation was carried out. The extension arm and truss were deployed and locked During the process of changing the law of the reaction force on the centroid and centroid. Some simulation results were verified by commercial software MSC.ADAMS. Simulation process and results can provide reference for practical engineering applications.