Optimization of the moment of inertia and the release conditions of a discus

Kazuya Seo, Koji Shimoyama, Ken Ohta, Yuji Ohgi, Yuji Kimura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

This paper describes the concurrent optimization of the design of a discus and the skill with which it is thrown. The objective function for optimization is the flight distance, where longer is better. Thirteen control variables are considered, twelve of which are concerned with the skill of the thrower. These determine the launch conditions, which are controlled by the thrower when he or she throws the discus. The final variable is concerned with the discus itself. This is the moment of inertia on its transverse axis. The optimization was carried out with the aid of a genetic algorithm, and the entire trend for each generation between the objective function and the control variables could be visualized with the aid of self organizing maps. It was found that the flight distance achieved with concurrent optimization was longer than that optimized for skill alone. In the case of the optimal flight, the angle of attack should always be less than the stalling angle.

Original languageEnglish
Title of host publicationProcedia Engineering
PublisherElsevier Ltd
Pages170-175
Number of pages6
Volume34
DOIs
Publication statusPublished - 2012
Event9th Conference of the International Sports Engineering Association, ISEA 2012 - Lowell, MA, United States
Duration: 2012 Jul 92012 Jul 13

Other

Other9th Conference of the International Sports Engineering Association, ISEA 2012
CountryUnited States
CityLowell, MA
Period12/7/912/7/13

Fingerprint

Self organizing maps
Angle of attack
Genetic algorithms

Keywords

  • Concurrent optimization
  • Data mining
  • Discus
  • Genetic algorithm
  • Self-organizing map

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Seo, K., Shimoyama, K., Ohta, K., Ohgi, Y., & Kimura, Y. (2012). Optimization of the moment of inertia and the release conditions of a discus. In Procedia Engineering (Vol. 34, pp. 170-175). Elsevier Ltd. https://doi.org/10.1016/j.proeng.2012.04.030

Optimization of the moment of inertia and the release conditions of a discus. / Seo, Kazuya; Shimoyama, Koji; Ohta, Ken; Ohgi, Yuji; Kimura, Yuji.

Procedia Engineering. Vol. 34 Elsevier Ltd, 2012. p. 170-175.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Seo, K, Shimoyama, K, Ohta, K, Ohgi, Y & Kimura, Y 2012, Optimization of the moment of inertia and the release conditions of a discus. in Procedia Engineering. vol. 34, Elsevier Ltd, pp. 170-175, 9th Conference of the International Sports Engineering Association, ISEA 2012, Lowell, MA, United States, 12/7/9. https://doi.org/10.1016/j.proeng.2012.04.030
Seo K, Shimoyama K, Ohta K, Ohgi Y, Kimura Y. Optimization of the moment of inertia and the release conditions of a discus. In Procedia Engineering. Vol. 34. Elsevier Ltd. 2012. p. 170-175 https://doi.org/10.1016/j.proeng.2012.04.030
Seo, Kazuya ; Shimoyama, Koji ; Ohta, Ken ; Ohgi, Yuji ; Kimura, Yuji. / Optimization of the moment of inertia and the release conditions of a discus. Procedia Engineering. Vol. 34 Elsevier Ltd, 2012. pp. 170-175
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