Optimization of aerostat helium temperature differences between day and night based on Kriging model

Considering the entire skin coating of aerostat envelop materials as one material, the effect of absorption and emission rate of aerostat envelop materials on helium temperature differences between day and night is investigated. In order to further reduce helium temperature differences between day and night, in this paper, aerostat envelop materials are divided into illuminated side with materials of low absorption rate and backlight side with materials of high emission rate. Under the established thermal analysis model, material properties in different parts of aerostat envelop materials are optimized with the method of Kriging model. It holds the thoughts that aerostat envelop materials can be divided into 48 parts, Latin hyper-cube method is used to do sampling, and sample response can be obtained through thermal analysis so as to build a Kriging approximate model. As the result, it shows that the helium temperature difference between day and night is reduced to 28.6 K, which is 7.7% less than the traditional ways of analysis.