Design problems for machine products are generally hierarchically expressed. With conventional product optimization methods, however, it is difficult to concurrently optimize all design variables of portions within such hierarchical structures. This paper proposes a design optimization method using genetic algorithms containing hierarchical genotype representations, so that the hierarchical structures of machine system designs are exactly expressed through genotype coding, and optimization can be concurrently conducted for all of the hierarchical structures. Crossover and mutation operations for manipulating the hierarchical genotype representations are also developed. The proposed method is applied to a machine-tool structural design and a 2 DOF robot arm design to demonstrate its effectiveness.
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e-mail: yoshimura@prec.kyoto-u.ac.jp
e-mail: izui@prec.kyoto-u.ac.jp
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September 2002
Technical Papers
Smart Optimization of Machine Systems Using Hierarchical Genotype Representations
Masataka Yoshimura, Mem. ASME, Professor,
e-mail: yoshimura@prec.kyoto-u.ac.jp
Masataka Yoshimura, Mem. ASME, Professor
Department of Precision Engineering, Graduate School of Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
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Kazuhiro Izui, Research Associate
e-mail: izui@prec.kyoto-u.ac.jp
Kazuhiro Izui, Research Associate
Department of Precision Engineering, Graduate School of Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
Search for other works by this author on:
Masataka Yoshimura, Mem. ASME, Professor
Department of Precision Engineering, Graduate School of Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
e-mail: yoshimura@prec.kyoto-u.ac.jp
Kazuhiro Izui, Research Associate
Department of Precision Engineering, Graduate School of Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
e-mail: izui@prec.kyoto-u.ac.jp
Contributed by the Design Automation Committee for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received December 1999. Associate Editor: A. Diaz.
J. Mech. Des. Sep 2002, 124(3): 375-384 (10 pages)
Published Online: August 6, 2002
Article history
Received:
December 1, 1999
Online:
August 6, 2002
Citation
Yoshimura, M., and Izui, K. (August 6, 2002). "Smart Optimization of Machine Systems Using Hierarchical Genotype Representations ." ASME. J. Mech. Des. September 2002; 124(3): 375–384. https://doi.org/10.1115/1.1486013
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