基于统计学方法的卫星在轨热变形快速分析

发布时间：2018-01-28 22:26

本文关键词： 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　出处：《中国空间科学技术》2016年06期 　论文类型：期刊论文

【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。
[Abstract]:In order to use the in-orbit temperature data to accomplish the on-orbit calibration of the imaging load axis, the ordinary Kriging method, which is used in geostatistics, is applied to the unbiased estimation of the satellite temperature field in orbit for the first time. A fast analysis method of thermal deformation in orbit based on statistical method is proposed. The unbiased estimation of satellite temperature field is carried out by using a small amount of measured data of satellite temperature in the course of thermal test. The results of temperature calculation are assigned to the finite element model, and the thermal deformation analysis is completed. Compared with the thermal physical method, the time limit of thermal deformation analysis can be shortened by a few days. The error between the analysis results of load deformation and the experimental results is about 1'. The direction change of the load axis under thermal deformation can be obtained more accurately. The paper can provide a reference for the fast analysis of the thermal deformation of satellite in orbit.
【作者单位】：北京空间飞行器总体设计部;
【基金】：战略性先导科技专项
【分类号】：V414
【正文快照】： 网络出版地址:http:∥www.cnki.net/kcms/detail/11.1859.V.20161216.1129.007.html引用格式:张也弛,张龙,罗文波,等.基于统计学方法的卫星在轨热变形快速分析[J].中国空间科学技术,2016,36(6):55-61.ZHANG Y C,ZHANG L,LUO W B,et al.Rapid thermal deformation analysis of

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