摘要
对周边桁架式星载展开天线的动力优化问题进行了研究。分析了天线的结构特点,对结构预应力设计变量进行了选择和归并。讨论了以天线结构质量为目标函数,以周边桁架各单元的截面积和反射索网中各拉索单元预应力为设计变量,在优化中同时考虑天线结构的反射面精度要求、天线的动力性能和静力性能要求的展开天线动力优化设计问题,建立了天线结构的动力优化数学模型。最后,将该模型应用于某17m口径的天线结构,并利用改进后的遗传算法对其进行了优化计算,取得了比较满意的结果。
The deployable antenna has been applied widely with development of space science and technology. Recently, the cable net structure becomes more and more popularized for it is not only with light weight and little furl volume, but also able to be made in large size. Considering the flexible cable net deployable antenna, the structural characteristics of the large deployed antenna for satellite have been discussed. And an optimum design model searching for minimum weight (volume), considering both the size variables and prestress variables is studied. The reflect precision, eigenfrequency, strength and cable's allowable stress is taken into account in the optimal design. The improved GA method is used to solve it with reasonable results.
出处
《空间科学学报》
CAS
CSCD
北大核心
2004年第3期203-210,共8页
Chinese Journal of Space Science
基金
总装备部"十五"重点预研项目
关键词
展开天线
优化设计
卫星
应力分析
遗传算法
Deployed antenna
Dynamic optimum
Flexible mesh
Prestress
Genetic Algorithms
