大型索网反射面天线空间动力学分析

大型可展开索网反射面天线是目前较为理想的天线结构形式。由于其自身的结构特点以及复杂的空间环境因素，天线在运行时易产生大幅度振动变形，严重影响卫星的稳定运行。文中以某星载大型可展开索网反射面天线为切入点，对其进行了空间动力学分析。针对天线与中心刚体之间的多体动力学刚–柔耦合问题，首先根据模型分析参数建立了卫星–天线–太阳翼的星体系统模型，然后对该多体动力学模型系统进行了模态分析和瞬态动力学响应分析，从频域和时域上分析其振动特性，并分析了天线网面的形面精度随时间的变化规律。

Spatial Dynamic Analysis of Large-scale Cable Net Reflector Antenna

The large-scale deployable cable net reflector antenna is currently the ideal antenna structure. Due to its structural characteristics and complex space environment factors, the antenna is prone to large vibration and deformation during operation, which seriously affects the stable operation of the satellite. In this paper a large-scale deployable cable-mesh reflector antenna on a satellite is taken as an entry point, and its dynamic analysis in orbit is carried out. For the problem that coupling motion between rigid satellite and the flexible antenna, the model of satellite system with antenna and solar wings is established based on the analysis parameters. Then the modal analysis and transient dynamic response analysis of the multi-body dynamic model are carried out. The vibration characteristics of the antenna are analyzed from the frequency domain and the time domain and the variation of the antenna reflector surface error with time is analyzed.