星载高精度环形网状天线设计方法  

Design Method of High Precision Perimeter Truss Antenna on Board

作　　者：张华振[1] 马小飞[1] 宋燕平[1] 陈国辉[1] 李团结[2] 

机构地区：[1]西安空间无线电技术研究所,西安710100 [2]西安电子科技大学,西安710071

出　　处：《中国空间科学技术》2013年第5期1-6,共6页Chinese Space Science and Technology

基　　金：国家自然科学基金(11290154)资助项目

摘　　要：星载环形网状天线的质量小、型面几何精度好、结构刚度高,代表了现有大型可展开天线的先进水平。随着天线工作频率的不断提高,对型面精度提出了越来越高的要求。文章首先介绍了基于高精度环形天线组成和结构系统力学设计思想,讨论了实现高精度设计的基本原理。然后详细分析了高热稳定双层张力网对称设计方法和基于椭圆展开桁架的高精度设计方法,对称布局优化了网面系统的张力分布和系统刚度,能够提高网面抵抗热变形的能力。椭圆展开桁架保证了所有节点都在硬点上,能够提高系统的结构稳定性。椭圆结构有斜切和竖切两种方式,斜切方式实现了任意的角度旋转,所以能够选出较优的节点组合。Owing to its lightweight, high precision and high stiffness, the perimeter truss antenna is the current state-of-art of the large deployable antenna. The antenna precision is becoming more and more critical with the advancement of the in-space applications. Firstly, the composition and fundamental to realize the high precision perimeter truss antenna was introduced. Based on the real engineering realization, considerations of achieving the high precision, design analysis method, on-orbit thermal deformation was discussed in detail. Secondly, the methodology of two mesh tension symmetry layout and ellipse perimeter truss for improving antenna precision was proposed. Symmetry layout can get good stress distribution and system stiffness. So thermal environment can＇t change the surface coordination evidently. Ellipse perimeter truss can realize all node on the rigid point, on the same time, ellipse structure is more stable than the cycle structure. There are two intersection styles between the ellipse and cycle structures, such as inclination and uprightness intersection, and inclination style can rotate angel arbitrarily so that some diverse node assignment combination can be selected.

关 键 词：环形网状天线 型面精度 桁架结构 星载 

分 类 号：V443.4[航空宇航科学与技术—飞行器设计]