Application study of a correction method for a spacecraft thermal model with a Monte-Carlo hybrid algorithm |
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Authors: | Cheng WenLong Liu Na Li Zhi Zhong Qi Wang AiMing Zhang ZhiMin He ZongBo |
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Institution: | (1) Harbin Institute of Technology, Harbin, 150001, China;(2) National Key Lab. of Vacuum & Cryogenics Technology and Physics, Lanzhou Institute of Physics, Lanzhou, 730000, China |
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Abstract: | The correction of a thermal model for a thermally controlled satellite in ground test conditions is studied using a Monte
Carlo hybrid algorithm. First, the global and local parameters are summarized according to sensitivity analyses on uncertain
parameters, and then the model correction is treated as a parameter optimization problem to be solved with a hybrid algorithm.
Finally, the correction of the thermal model is completed using a layered correction method. The sensitivity analysis showed
that the effective emissivities across the multi-layer insulation (MLI) and the emissivities of the thermal control coating
are global parameters, while the contact heat transfer coefficients are local parameters. After correction, the deviations
between the calculated and test values were all within ±3°C. The final results prove that the method in this study is superior
to traditional methods and satisfies the requirements for thermal model correction. |
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Keywords: | model correction thermal model thermal balance test results Monte Carlo |
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