›› 2013, Vol. 33 ›› Issue (1): 45-52.doi: 10.3780/j.issn.1000-758X.2013.01.007

Previous Articles     Next Articles

Application and Improvement of Temperature Prediction Method for Thermal Balance Test of Space Camera

Shi Jinfeng1,2,Wu Qingwen1,Huang Yong1,Yang Xianwei1   

  1. (1 Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033)(2 Graduate University of Chinese Academy of Sciences,Beijing 100049)
  • Received:2012-06-05 Revised:2012-07-12 Online:2013-02-25 Published:2013-02-25

Abstract: In order to predict the balance temperature of thermal balance test for spacecraft, equation for predicting the thermal balance temperature was established. The parameters which influenced the prediction accuracy were analyzed. Firstly, the formula of balance temperature was derived by the node network method. The solution process of the formula based on the non-linear least square method was introduced. The iterative equation of balance temperature was deduced. Secondly, based on a large number of experimental data, a statistical analysis for three factors that influenced the results of the iteration equation was done, and a reasonable range of each factor was determined. Finally, the balance temperature of a space-camera′s temperature balance testing in low temperature condition was predicted by the temperature prediction process. At the end of the experiment, the analysis results were compared with the experiment results. It is shown that the error between the predicted temperature and the test data is less than ±1℃(the error is within 3%). It meets the accuracy requirements of the test. The accurate prediction of the balance temperature could short the test time and save the cost of test effectively.

Key words: Node network method, Thermal balance test, Temperature prediction, Non-linear least square method, Space camera