ローラ式バドミントンマシンの開発と性能向上

概要

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Shuttlecock used in badminton match is light in mass, which is strongly influenced by air resistance. The highest launching velocity of the shuttlecock exceeds 300km/hr for professional badminton players. In this study, the improving performance of the badminton machine with the two rollers developed by the author is examined. Finite element models of a feather shuttlecock and the badminton machine with two rollers are made, and the projection simulations proceed with the moving behavior and contact stress of the shuttlecock. The coefficient of friction is examined from the surfaces in contact with the shuttlecock and the roller in the analysis. From the results of analysis, it is found that the roller with a large diameter attains the higher speed of the shuttlecock than the small rollers for every project. The taper angles of the roller edge and the insert height of the shuttlecock relative to the roller surface are optimized for attaining the maximum shuttle speed by the projection simulation and the response surface approach. In the results of the optimization, the performance of the machine has been improved as the shuttle speeds increased by about 7% and the stress causing the shuttle deterioration decreased. Additionally, the validity of the optimum condition has been confirmed by the corresponding shot experiments using the two-roller type badminton machine.