基于在轨温度测量数据的整星结构尺寸稳定性分析

针对高精度测绘卫星结构尺寸稳定性这一关键性问题，基于在轨温度测量数据，利用热分析模型和在轨温度变化规律，提出了卫星结构在轨温度场的反演方法。基于卫星结构在轨温度场反演数据，提出了针对载荷安装面法向夹角的拟合计算方法和夹角稳定性短期、长期指标的预示方法。根据该方法，给出了高分七号卫星在轨初期1个月内的结构稳定短期指标和长期指标预示结果，并对短期稳定性预示结果进行了统计分析。结果表明，各载荷安装面短期稳定性分析结果满足指标要求，相关分析方法可为同类航天器的结构热变形分析提供参考。

Dimensional stability analysis of the satellite structure based on in-orbit temperature measurement data

Aiming at the critical problem of dimensional stability of high precision mapping satellite structure, an inversion algorithm of in-orbit temperature field of satellite structure was proposed by using the analysis model and the variation rule of in-orbit temperature. Furthermore, the predictive methods of the short-term and long-term angle stability of payloads mounting interface were proposed. And then based on the above methods, the predictive values of short-term and long-term structure stability of GF-7 satellite within the first month were presented. Finally, the results of short-term stability were analyzed statistically. The results show that the prediction results of the short-term stability meet the requirements.