可展桁架天线形面精度理论分析  

Theoretical Analysis of Surface Error for Deployable Truss Antenna

作　　者：杨玉龙[1] 关富玲[1] 

机构地区：[1]浙江大学建筑工程学院,杭州310058

出　　处：《空间科学学报》2009年第5期529-533,共5页Chinese Journal of Space Science

基　　金：国家自然科学基金项目资助(69982009)

摘　　要：针对可展桁架天线杆件多和转动铰多的特点,研究杆件加工公差和转动铰间隙对天线反射面精度和重复展开精度的影响。根据杆件加工公差和转动铰间隙发生的随机性,建立相应的随机数据模型和Monte-Carlo随机有限元模型,计算杆件加工公差和转动铰间隙所引起的天线反射面精度误差。研究表明,间隙所引起的反射面精度误差远大于杆件公差所引起的误差,并且天线重复展开精度差值不宜忽视。Aimed at the characteristics of large deployable truss antenna with many trusses and joints, surface error and repetitive deployable precision of antenna with tolerances of trusses and joints clearances were studied. Considered the randomicity of tolerances of trusses and joints clearances, a stochastic finite element model of deployable truss antenna used Monte-Carlo method was developed to simulate the root mean square of surface error. It is shown that the value of root mean square of surface error caused by joints clearances is much larger than that from tolerances of trusses, and the repetitive deployable precision error of antenna can not be neglected.

关 键 词：展开桁架天线 公差 间隙 Monte—Carlo法 随机有限元 形面精度误差 

分 类 号：TN823[电子电信—信息与通信工程]