102 ラグビーハイパントの揺れ回数とハングタイムに関する多目的最適化

概要

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What are the features of the optimal punted kick in rugby? What is the best way to achieve satisfactory kicks? The objective of this paper is to provide the answers to these questions by optimizing the initial velocity and angular velocity vectors as well as the initial Euler angles for the punted kick. Three objective functions are considered, two of which are the number of extrema in the forward and the lateral directions. The third objective function is the hang time. For optimization all the objective functions must be maximized. The optimization was carried out by using an elitist non-dominated sorting genetic algorithm. The results are summarized as follows: in order to make the hang time longer, the initial pitch angle should be about 90°like a rocket. In the phase of rising, the smaller angle between the longitudinal axis of the ball and the direction of the flight path is preferable. In the phase of falling, the larger angle is preferable. In order to fluctuate the ball more frequently, the spin should be given to change the direction of the side force.
社団法人日本機械学会の論文
2006-12-08