星载大型反射面天线的刚-柔-姿控一体化在轨振动分析方法

随着大型可展开环形天线在航天器上的应用,口径越来越大,指标更加严格,卫星姿控、轨控、太阳翼驱动等导致的机械运动必然会引起大型反射面天线的振动,从而造成电性能降低,影响任务完成质量。提供了一种获取大型环形天线在轨振动影响的刚–柔–姿控一体化分析方法,建立了集扰动源、整星刚柔耦合动力学模型、姿态控制系统、天线振动影响分析的一体化仿真分析模型,实现了在典型扰动模式下的环形天线的振动响应计算、环形天线整体指向和变形计算。分析结果为天线在轨振动影响分析、性能指标预示、振动传递机理及抑制措施提供支持。

Rigid-Flexible-Attitude Control Integrated In-Orbit Vibration Analysis Method for Large Satellite Reflector Antennas

Large deployable mesh antennas will be used increasingly in the spacecraft. Not only the size of the antenna increases more and more,but also the technical requirement becomes even tighter. The mechanical motions coming from attitude control,orbit control,solar array rotating inevitably result in vibrations of large reflector structure and lead to reducing the electrical performance of the antenna and the quality of the mission. A rigid-flexible-attitude control integrated analysis method is presented. The integrated simulation model consists of disturbance,rigid-flexible coupling dynamic model,attitude control,and antenna vibration effect analysis. Under the typical operating disturbance modes of the satellite,the computations of the vibration responses,the whole antenna pointing and the distortion level of the antenna structure are carried out. The analysis results will support the antenna in-orbit vibration effect analysis,performance index prediction,and vibration transfer mechanism analysis and vibration control measures.