形面精度可调节的单层索网空间抛物面天线  

Deployable paraboloid space antenna with adjustable one-layer cable-net reflector

作　　者：李昊[1] 邓泽华 李奇[1] LI Hao;DENG Zehua;LI Qi(Shanghai Institute of Satellite Engineering,Shanghai 201109,China)

机构地区：[1]上海卫星工程研究所,上海201109

出　　处：《中国空间科学技术》2022年第3期82-92,共11页Chinese Space Science and Technology

基　　金：上海航天技术研究院基础前沿基金(qy2017003)。

摘　　要：大口径高形面精度的空间可展开天线是未来航天器天线的重要发展方向之一。提出了一种新型形面可调节的单层索网空间可展开天线。通过对单层索网进行静力平衡分析,给出了单层索网天线的内力计算方法,并基于能量法,建立了单层索网天线的形状预测理论模型,实现了单层索网天线的三步法找形方法。基于理论分析结果,建立了50 m口径的单层索网天线的有限元模型,通过有限元模型对建立的单层索网理论设计分析方法进行了验证,并验证了单层索网天线的形面精度及在轨调整的可行性。理论分析和有限元分析结果表明,单层索网天线拓扑构型简单,可通过改变天线中心轴的长度,实现天线形面的在轨调节。在100℃的均匀温差下,通过在轨形面调节,50 m口径单层索网天线的形面误差可降低至5 mm以下。There remains ongoing demands of high precision deployable antennas with large aperture in many space applications. A novel concept of one-layer cable-net antenna was proposed. The one-layer cable-net antenna is much simpler in topology, and the surface precision of which can be easily adjusted by adjusting the length of its central column. The method for predicting the internal cable forces was presented, and the form-finding method was proposed based on the energy method. Based on the theoretical analysis, the finite element model of a one-layer-cable-net antenna with 50 m aperture was established. Through FEA, both the principle of the proposed concept and the feasibility of in-orbit adjustment of the surface precision were approved. Theoretical analysis and FEA both indicate that, with a uniform temperature variation of 100℃,the RMS surface error of a 50 m one-layer cable-net antenna can be reduced to 5 mm.

关 键 词：空间可展开天线 形面精度 在轨调节 抛物面反射面 索网 

分 类 号：V423.9[航空宇航科学与技术—飞行器设计]