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Acceleration of Experiment-Based Evolutionary Multi-objective Optimization Using Fitness Estimation

Hirotaka KajiContact Information and Hajime KitaContact Information

(1)  Research and Development Operations, Yamaha Motor Co. Ltd., 2500 Shingai, Iwata, Shizuoka, Japan
(2)  Academic Center for Computing and Media Studies, Kyoto Univercity, Yoshida nihonmatsu-cho, Sakyo-ku, Kyoto, Japan
Abstract
Evolutionary Multi-objective Optimization (EMO) is ex-pected to be a powerful optimization framework for real world problems such as engineering design. Recent progress in automatic control and instrumentation provides a smart environment called Hardware In the Loop Simulation (HILS). It is available for our target application, that is, the experiment-based optimization. However, since Multi-objective Evolutionary Algorithms (MOEAs) require a large number of evaluations, it is difficult to apply it to real world problems of costly evaluation. To make experiment-based EMO using the HILS environment feasible, the most important pre-requisite is to reduce the number of necessary fitness evaluations. In the experiment-based EMO, the performance analysis of the evaluation reduction under the uncertainty such as observation noise is highly important, although the previous works assume noise-free environments. In this paper, we propose an evaluation reduction to overcome the above-mentioned problem by selecting the solution candidates by means of the estimated fitness before applying them to the real experiment in MOEAs. We call this technique Pre-selection. For the estimation of fitness, we adopt locally weighted regression. The effectiveness of the proposed method is examined by numerical experiments.

Contact Information Hirotaka Kaji
Email: kajih@yamaha-motor.co.jp

Contact Information Hajime Kita
Email: kita@media.kyoto-u.ac.jp
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