中国空间科学技术

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航天器热网络模型及其系数修正方法

翁建华，潘增富   

  1. 北京空间飞行器总体设计部
  • 发布日期:1995-08-25

A CORRECTION METHOD FOR SPACECRAFT THERMAL NETWORK AND ITS COEFFICIENTS

Weng Jianhua; Pan Zengfu(Beijing Institute of Spacecraft Systems Engineering. Beijing 100086)   

  • Published:1995-08-25

摘要： 叙述了目前航天器热网络模型与航天器实际换热之间的偏差，提出了利用航天器稳态热平衡试验结果进行热网络模型及其系数修正的方法。通过对某仪器舱热平衡试验数据的处理，实现了对该仪器舱热网络模型及其系数的修正，并对修正的结果进行了讨论。

关键词: 热分析, 网络, 系数, 模型, 航天器

Abstract: Simplification of mathematical modelling and uncertainties of physical parameters which cause the difference between experiment data and numerical results calculated by thermal network method are discussed. To improve the accuracy of analytical predictions, it is necessary to correct the thermalnetwork by experiment data. The difficulties of correction are too many coefficients needed to be corrected.the small temperature difference among nodes and no experiment data at some nodes.A new method to deal with these difficulties is developed in this paper. The method simplifies the radiation relationships of mathematical model, and uses Least Square Estimation to produce a more practical mathematical model. The themal network of a spacecraft compartment is corrected by this method.