“希望一号”卫星热平衡试验的误差分析

为研究卫星热平衡试验误差,建立＂希望一号＂卫星热试验的联合热数学模型,对热平衡试验进行模拟,并与理想状态进行比较,发现仪器试验温度值在低温工况中偏低13～20℃,高温工况中偏低11～17℃;高温工况中-Y舱板表面到达热流不均匀度高达27.3%。此外,分析了热试验中热沉的温度、表面发射率、与卫星的表面积比,支架的导热、辐射漏热,电缆的导热、辐射漏热,以及热流计温度测量误差对卫星温度场的影响。

The error analysis of satellite thermal balance test for Xiwang-1 satallite

This paper analyzes the errors in satellites＇ thermal balance test, based on a combined thermal model of the Xiwang-1 satellite thermal balance test （TBT） and the analysis results are compared with the data in the ideal state. The thermal balance test error of Xiwang-1 is 13-20℃ in the low temperature case and 12-17℃ in the high temperature case; the non-uniformity of the received heat flux on -y cabin panel may reach 27.3% in the high temperature case. Besides, the influences of the temperature, the surface emissivity of the heat sink and the heat sink-satellite surface area ratio, the conduction and radiation heat leak of the bracket and the cable, and the radiometer temperature measurement error on the satellite temperature distributions are analvzed.