基于Kriging模型的浮空器氦气昼夜温差最优化

分析浮空器氦气昼夜温差时通常将整个囊体蒙皮涂层设置为同一种材料，分析材料的吸收率与发射率对氦气昼夜温差的影响。为进一步减小氦气昼夜温差，提出了将囊体分为迎光面和背光面，迎光面采用吸收率低的材料，背光面采用发射率高的材料。建立了囊体热力学模型，采用Kriging模型对囊体不同部位的材料特性进行优化，其基本思想是将囊体划分为48个部分，采用拉丁超立方体方法进行抽样，进行热力学分析得到样本的响应，以此建立Kriging近似模型。经过该方法优化后发现，氦气的昼夜温差减小到28.6 K，比传统的分析减少7.7%。 

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.