基于统计学方法的卫星在轨热变形快速分析  

Rapid thermal deformation analysis of on-orbit satellites on the basis of statistic method

作　　者：张也弛[1] 张龙[1] 罗文波[1] 潘腾[1] 

机构地区：[1]北京空间飞行器总体设计部,北京100094

出　　处：《中国空间科学技术》2016年第6期55-61,共7页Chinese Space Science and Technology

基　　金：战略性先导科技专项

摘　　要：为使用在轨实测温度数据辅助完成成像载荷视轴指向的在轨标定,首次将应用于地统计学中的普通克里格法用于卫星在轨温度场的无偏估计,提出了一种基于统计学方法的在轨热变形快速分析方法。应用热试验过程中星上少量温度实测数据进行卫星温度场的无偏估计,并将温度计算结果赋值到有限元模型,进而完成了热变形分析。应用此种方法,相比通过热物理方法进行温度场分析,可将热变形分析的工期缩短数日,且载荷变形的分析结果与试验实测结果的误差在1′左右,可较准确地得到载荷视轴在热变形作用下的指向变化。文章可为卫星在轨热变形的快速分析提供参考。To calibrate the orientation position of the satellite orbit by the temperature sensors, the ordinary Kriging method widely used in geo-statistics was applied into the temperature estimation process of the satellite. A rapid thermal deformation analysis method was developed based on the statistic methods. Based on a small amount of temperature sensors, estimation of the temperature field was carried out. Then, the temperature field was used for the finite element analysis to accomplish the thermal deformation analysis. Differences between the analytical and the experimental results of the deformation of the payload are around 1＇, which confirms that the method can be used to obtain the variation of optical axis of the payload. Furthermore, compared to the thermo physical method, the work period can be reduced by several days. This work provides guidance for rapid thermal deformation analysis of on-orbit satellites.

关 键 词：温度实测点 快速热变形分析 统计方法 普通克里格法 变差函数 有限元 卫星 

分 类 号：V414.3[航空宇航科学与技术—航空宇航推进理论与工程]