Study On The Thermal Design For Carbon Dioxide And Technique Of Thermal Analysis Model Correction

Since the 21 st century,with the worsening trend of global warming,international community is paying more and more attention to the emission of greenhouse gases.Space developed nations such as the U.S.and European countries had carried out spatial infrared hyper-spectral technology to monitor greenhouse gases.At present,there are many hyper-spectral detection satellites in space,performing important task about greenhouse gases monitoring.China is speeding up the pace to develop high spatial resolution infrared optical remote sensor and carrying out the research of CO₂ spatial observation.Optical remote sensor is susceptible in space environment,some thermal design should be taken to ensure the quality of imaging.Major research of this paper are thermal design for CO₂ detector infrared detector components,thermal balance test and thermal analysis model correction methods.First,this paper overviewed the research background and meaning of the project,the development of greenhouse gas optical remote sensor and the thermal control state were reported,the paper also introduced and summarized some thermal analysis model correction methods from home and abroad in recent decades.Then,the next chapter narrated the thermal design of CO₂ detector,especially infrared detector components,detailed thermal design was presented for them,and thermal analysis was carried out according to the thermal control measures;The following chapter introduced the thermal balance test procedures of spatial optical remote sensor,summarized the CO₂ detector flight model thermal balance test,and compared the test’s data with thermal analysis results.In addition,according to the thermal balance test’s data,Monte Carlo sampling and simplex mixed method was applied to correcting the detector thermal analysis model.Using the Spearman rank correlation coefficient,parametric sensitivity analysis of CO₂ detector thermal analysis model was completed,the model parameters were divided into global sensitive,local sensitive and insensitive parameters,and three layer corrections were took according to the analysis results.Finally,the last chapter pointed out the shortcomings of this correction method,by the secondary development of I-DEAS thermal analysis software,the correction method was modified to improve efficiency.Using the modified method,the thermal analysis model of wide angle aurora imager was corrected to verify the correction efficiency after modified.The thermal balance test results of CO₂ detector show that all the components had fulfilled the thermal control indexes in different cases,which proved the correctness of thermal design;After correcting CO₂ detector thermal analysis model by mixed method,compared the temperature differences between thermal analysis calculation and thermal balance test before and after correction,the results show that the corrected temperature difference is blow ±0.5℃ for all the temperature monitors,the residual error correction rates are above 80%,the correction effect is obvious;The correction results of wide angle aurora imager display that the modified method raised correction efficiency,saved time and labor cost.