上海交通大学学报(自然版) ›› 2014, Vol. 48 ›› Issue (09): 1346-1350.

• 其他 • 上一篇    下一篇

基于小波变换和多元回归的航天器热循环试验系统温度均匀性分析

杨光,吴静怡   

  1. (上海交通大学 制冷与低温工程研究所, 上海 200240)
  • 收稿日期:2014-01-17
  • 基金资助:

    高等学校博士学科点专项科研基金项目(20120073110044)资助

Analysis of Temperature Uniformity in a Spacecraft Thermal-Cycling Test System Based on Wavelet Transform and Multiple Regression

YANG Guang,WU Jingyi   

  1. (Institute of Refrigeration and Cryogenics, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2014-01-17

摘要:

摘要:  为了解决航天器热循环试验系统的温度均匀性问题,提出了一种基于试验研究、小波变换和多元回归分析相结合的预测模型.利用小波变换对试验所测湍流压力信号进行滤波处理,并用多元回归统计方法分析了系统中各变量之间的关系,同时,通过试验数据验证了预测模型的准确性.结果表明:所提出的模型可用于预测系统在不同试验条件下的温度均匀性;通过小波变换能够提高预测精度.

关键词: 航天器, 热循环试验, 温度均匀性, 小波变换, 多元回归

Abstract:

A model for predicting the temperature uniformity in a thermal cycling test system for space application was proposed in this paper based on experimental data, wavelet transform and multivariate statistical analysis. The turbulent pressure signals were decomposed and reconstructed by wavelet analysis, and the correlation of the temperature nonuniformity factor with other variables were obtained by multiple regressions. An experiment was conducted to validate the proposed model. In addition, the wavelet transform was proved to have the potential to improve the accuracy of the prediction.
spacecraft; thermal cycling test; temperature uniformity; wavelet transform; multiple regression

Key words: spacecraft, thermal cycling test, temperature uniformity, wavelet transform, multiple regression

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