非对称环形天线型面稳定性的参数匹配设计方法

doi:10.3969/j.issn.1001-2400.2017.03.020

摘要/Abstract

摘要：

为解决非对称环形索网天线在空间温变环境下型面稳定性较差的问题，推导了环形天线索网结构热载荷下的两个平衡方程．为实现索网在空间温变环境下的水平方向稳定，主副索网进行了等张力设计．给出了索网结构进行等张力设计的求解算法，该算法求解时采用最速下降法，比采用直接法具有更好的收敛性．为实现索网结构在空间温变环境下的垂直方向稳定，对主副索网的张力索截面参数进行了匹配设计．利用有限元法对设计进行了验证，结果表明，采用所述方法设计的非对称环形天线索网结构，在极端温度工况下具有很好的型面稳定性．

关键词: 非对称, 环形天线, 温变环境, 型面, 稳定性

Abstract:

The asymmetrical astromesh reflector surface is unstable when the space thermal environment is changing. To solve the problem, the article deduces two formulae that are required for stability design of the astromesh reflector network under a thermal load. According to the formulae, to keep horizontal stability, both the front net and the rear net of the astromesh reflector net should be designed with equal tension. The article presents a form-finding method to design equal tension cable networks, based on the steepest descent algorithm. The method has a better convergence than the one based on the direct iteration. To keep vertical stability, the cross section areas of rear net cable and front net cable should be match-designed. The design method described in the article is validated by the finite element method. The result shows that the asymmetrical astromesh reflector network designed by the method has a wonderful stability under an extreme thermal load.

Key words: asymmetrical, astromesh reflector, thermal load, surface, stability

王辉;宋燕平;马小飞. 非对称环形天线型面稳定性的参数匹配设计方法[J]. 西安电子科技大学学报, 2017, 44(3): 114-119.

WANG Hui;SONG Yanping;MA Xiaofei. Parameter matching design method to keep the asymmetrical astromesh reflector surface stable[J]. Journal of Xidian University, 2017, 44(3): 114-119.

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