정확한 크리깅 모델을 생성하기 위한 상관계수 선정 방법Selection Method of Correlation Coefficients for Accurate Kriging Surrogate Model
- Other Titles
- Selection Method of Correlation Coefficients for Accurate Kriging Surrogate Model
- Authors
- 김새결; 조수길; 장준용; 이태희
- Issue Date
- Nov-2014
- Publisher
- 대한기계학회
- Keywords
- Kriging Surrogate Model(크리깅 근사모델); Correlation Coefficient (상관계수); Maximum Likelihood Estimation(최우량추정법)
- Citation
- 대한기계학회 2014년도 추계학술대회, pp.936 - 937
- Indexed
- OTHER
- Journal Title
- 대한기계학회 2014년도 추계학술대회
- Start Page
- 936
- End Page
- 937
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/158588
- Abstract
- Design analysis and computer experiments (DACE) model, specifically kriging surrogate model, is widely used to describe nonlinear responses and utilized to substitute highly expensive model in engineering design. Correlation coefficient considerably influences on the predictivity of kriging surrogate model. Even though the correlation coefficient is highly associated with the nonlinearity of response, in optimization of the correlation coefficient, same initial value without such consideration has been used on previous research. This decreases the accuracy of the model and increases the possibility of convergence to local optimum. Therefore, in this study, initial value of correlation coefficient is determined by considering nonlinearity of the response and the correlation coefficient is estimated through maximum likelihood estimation (MLE) using sensitivity based optimization. Previous and proposed kriging surrogate models are compared by maximum likelihood function value and root mean squared error value.
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