摘要
由于空间大型可展开天线口径较大,在地面模拟太空环境难度高,使得直接在天线原型上进行性能测试非常困难或不可能。为了解决该问题,提出了一种"两步法",利用空间大型可展开天线的缩比模型进行地面性能测试,以预测天线原型在太空中的工作性能。据此对周边桁架可展开天线太空工作的结构固有频率进行性能预测研究,首先推导了结构固有频率的相似准则,然后考虑结构参数畸变的影响,得出其相似性经验公式,最后研究了温度变化对结构频率的影响,得出了预测大型天线太空工作性能的经验公式。仿真结果验证了该方法的有效性,该方法可应用于其他空间结构的设计和性能预测。
It is arduous or nearly impossible to carry out prototype experiments of large deployable space antennas because of their large apertures and the difficulty of simulating space environments on the ground. In order to solve this problem, a two-step approach is proposed in this article. The ground performance of a scale model of the large deployable space antenna is used to predict the working performance of the prototype in space. Based on this method, the structural natural frequency of the hoop truss deployable antenna working in space is studied. First, the similarity rules are derived. Second, the effect of the structural parameter distortion is taken into consideration and a similarity empirical formula of structural natural frequency is obtained. Finally, the effect of temperature change on structural frequency is studied, and the empirical formula predicting the performance of the large antenna working in space is derived. Simulation results validate the effectiveness of the method, and it can be applied to the design and performance prediction of the other space structures.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2009年第9期1648-1654,共7页
Acta Aeronautica et Astronautica Sinica
基金
国家部委预研项目(51321040102)
关键词
可展开天线
原型
模型
畸变
性能
deployable antenna
prototype
models
distortion
performance
