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航天器真空热试验中,温度数据的正确判读及预测十分困难,又十分重要。文章针对典型的太阳电池板试件建立了热模型,使用热分析中常见的有限差分法建立离散方程,通过最小二乘法拟合其系数,以预测下一个测控周期各个测量点的温度,并提出了滑动窗口修正的方法。基于某型号电池板试验数据对热模型的预测精度进行了验证和误差分析,最后对通过测点温度逆向预测加热功率的应用进行了讨论。
Spacecraft vacuum thermal test, the correct interpretation and prediction of temperature data is very difficult, but also very important. In this paper, a thermal model is established for a typical solar panel specimen. The finite difference method commonly used in thermal analysis is used to establish the discrete equation. The coefficients are fitted by the least square method to predict the temperature at each measurement point in the next measurement and control cycle. The sliding window correction method. Based on the test data of a certain type of battery, the prediction accuracy of the thermal model is verified and the error analysis is carried out. Finally, the application of heating power prediction by the temperature of the measuring point is discussed.