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Mathematical Problems in EngineeringVolume 2012 2012, Article ID 734193, 23 pages

Research ArticleHubei Key Laboratory of Hydroelectric Machinery Design and Maintenance, China Three Gorges University, Yichang 44300, China

Received 19 July 2012; Revised 14 October 2012; Accepted 15 October 2012

Academic Editor: Jyh Horng Chou

Copyright © 2012 Yi Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In consideration of the significant role the brake plays in ensuring the fast and safe running of vehicles, and since the present parameter optimization design models of brake are far from the practical application, this paper proposes a multiobjective optimization model of drum brake, aiming at maximizing the braking efficiency and minimizing the volume and temperature rise of drum brake. As the commonly used optimization algorithms are of some deficiency, we present a differential evolution cellular multiobjective genetic algorithm DECell by introducing differential evolution strategy into the canonical cellular genetic algorithm for tackling this problem. For DECell, the gained Pareto front could be as close as possible to the exact Pareto front, and also the diversity of nondominated individuals could be better maintained. The experiments on the test functions reveal that DECell is of good performance in solving high-dimension nonlinear multiobjective problems. And the results of optimizing the new brake model indicate that DECell obviously outperforms the compared popular algorithm NSGA-II concerning the number of obtained brake design parameter sets, the speed, and stability for finding them.





Autor: Yi Zhang, Hu Zhang, and Chao Lu

Fuente: https://www.hindawi.com/



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