摘要
星载四面体桁架式可展抛物面天线作为一种大型可展开天线,在我国发射的卫星上已经投入使用.针对天线结构设计的核心问题——上弦节点位置的确定方法展开研究.首先提出两个优化设计判断准则:弦杆夹角的均匀性和最小均方根误差.在分析现有方法的基础上,本文提出了基于平面桁架结构的映射方法,具体讨论了3种不同的映射方法:一是平面桁架垂直投影映射,二是中轴线弧等长映射,三是弦长协调变化映射.通过分析对比相关的弦杆夹角以及最小均方根误差,表明本文提出的方法三是相对最优的方案.
As a deployable form of large antenna, the spaceborne tetrahedron deployable parabolic truss antenna has been applied in Chinese satellite. This paper focus on the method of calculating the upper point location the core question of antenna structure design. Two optimal design criterions are first proposed. One is uniformity of chord angle and the other is minimum mean square error. Comparing to paper[4] ＇s method, a method based on plane truss representation is put forward. Three different methods are discussed. The first method is plane truss perpendicular projection. The second is the length of center line arc to be equal. The third is string length coordinate transformation. By analyzing and comparing the relevant intersection angle of spring pole and minimum mean square error, it is concluded that the third method is a relative optimum method.
出处
《空间结构》
CSCD
北大核心
2014年第3期61-68,共8页
Spatial Structures
关键词
可展抛物面天线
四面体桁架式天线
上弦节点定位
映射
弦杆夹角
分布均匀性
最小均方根误差
deployable parabolic antenna
tetrahedron truss antenna
upper point location
mapping
chord angle
distribution uniformity
minimum mean square error
