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A Metamodel-Based Global Algorithm for Mixed-Integer Nonlinear Optimization and the Application in Fuel Cell Vehicle Design

Haoxiang Jie1,2, Huihong Shi3, Jianwan Ding2,4, Yizhong Wu2, Qian Yin2
No.711 Institute, China Shipbuilding Industry Corporation, Shanghai, China
National CAD supported Software Engineering Centre, Huazhong University of Science and Technology, Wuhan, PR China
Financial school, Capital University of Economics and business, Beijing, PR China
corresponding author, Email: dingjw@mail.hust.edu.cn

Computer Modeling in Engineering & Sciences 2015, 108(3), 193-214. https://doi.org/10.3970/cmes.2015.108.193

Abstract

This paper improves the adaptive metamodel-based global algorithm (AMGO), which is presented for unconstrained continuous problems, to solve mixed-integer nonlinear optimization involving black-box and expensive functions. The new proposed method is called as METADIR, which can be divided into two stages. In the first stage, the METADIR adopts extended DIRECT method to constantly subdivide the design space and identify the sub-region that may contain the optimal value. When iterative points gather into a sub-region to some extent, we terminate the search progress of DIRECT and turn to the next stage. In the second phase, a local metamodel is constructed in this potential optimal sub-region, and then an auxiliary optimization problem extended from AMGO is established based on the local metamodel to obtain the iterative points, which are then applied to update the metamodel adaptively. To show the performance of METADIR on both continuous and mixed-integer problems, numerical tests are presented on both kinds of problems. The METADIR method is compared with the original DIRECT on continuous problems, and compared with SO-MI and GA on mixed-integer problems. Test results show that the proposed method has better accuracy and needs less function evaluations. Finally, the new proposed method is applied into the component size optimization problem of fuel cell vehicle and achieves satisfied results.

Keywords

Metamodel, Black-box function, Mixed-integer nonlinear optimization, Fuel cell vehicle.

Cite This Article

Jie, H., Shi, H., Ding, J., Wu, Y., Yin, Q. (2015). A Metamodel-Based Global Algorithm for Mixed-Integer Nonlinear Optimization and the Application in Fuel Cell Vehicle Design. CMES-Computer Modeling in Engineering & Sciences, 108(3), 193–214.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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