一种改进的CoKriging建模方法及其应用  

An improved CoKriging modeling method and its application

作　　者：张锡 杨希祥[1] 张为华 武泽平 赵海龙[1] 王鹏宇 ZHANG Xi;YANG Xixiang;ZHANG Weihua;WU Zeping;ZHAO Hailong;WANG Pengyu(Colloge of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学空天科学学院,湖南长沙410073

出　　处：《中山大学学报（自然科学版）（中英文）》2021年第4期136-145,共10页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金(52005502);国防科技大学研究项目(ZK19-11)。

摘　　要：提出了一种改进变可信度代理模型—ICoKriging模型。在CoKriging模型的基础上将CoKriging模型中的高精度样本与低精度样本扩展至高中低三种精度不同的样本,经数值算例及超声速减阻问题验证,该方法比较于Kriging模型和CoKriging模型精度更高,更易于全局寻优。An new improved variable-fidelity surrogate model(ICokriging model)was proposed. Based on the CoKriging model,we extended two different samples of the high-precision and low-precision of the CoKriging model to three different samples with high-precision,medium-precision and low-precision in the ICoKriging model. This new proposed model has higher accuracy and it is easier to find global optimization compared with the Kriging model and the CoKriging model,which was verified by numerical examples and a supersonic drag reduction problem.

关 键 词：CoKriging模型 ICoKriging模型 减阻 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]