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.
Shuttlecock used in a badminton match is light in mass (around 5 grams), and is strongly influenced by air drag force. For professional badminton players, the highest initial speed of the shuttlecock exceeds 84m/s (300km/hr), which is the fastest speed for a ball, racket or projectile sports. The shuttlecocks are of two kinds: one of feather and one that is a synthetic shuttlecock. A feather shuttlecock is constructed of 16 goose feathers with a cork base mostly. Also, a synthetic shuttlecock is made of plastic or nylon with a cork. Both shuttlecocks are light and of a complicated shape, therefore, it is extremely difficult for the shuttlecock to be launched at speeds of more than 42m/s without breaking the feather, even if the newest mechanical technology is used. In this study, new insertion equipment and the motion control system were proposed, and an exercise machine for badminton, used to project the shuttlecock at high speeds (over 42m/s), has been developed. The mechanism of the shuttlecock launcher in this machine was achieved using the friction force between two turn rollers and the shuttlecock. The results of the launcher experiments using the badminton machine show that the machine can project the feather shuttlecock at the maximum flight distance of about 11.5m, with a standard error of about 0.32m and the highest initial speeds being 52.8m/s. In the case of the synthetic shuttlecock, this machine achieved the maximum flight distance of about 9.7m, and the highest speeds being 47.8m/s.
Badminton shu し tlecock ls light mass , which is strongly influenced by air rcsis [ ance and that the wing Df the skirt ca 冂 bc easily broken . The highest initial veloci [ y of the shutt ] ecock cxceeds 300km 〆 11r for a professiDnal badminton player 、 In lhc prcscn [ study , [ he shoDting performance of the badminten nlachine developed by 1hc au 由 or is examined . Finitc clement models of a feather shutLlecock and [ he badminton machine wjth two rollers are madc , and the shooting simu ] ations prDceed with the moving bchavior and co 冂 tacl s [ress ofthc shuttlecQck . Th ¢ coefflcient of friction js oxamined from the surfaces in contact with 山 c shu 田 ccock and the roller irl the ana ] ysis . From the analysis , it ls shown tha[the ro ] ler with a small diameter attains thc 】 ower speed Df し he shuttlccock tllan the Dther ro ] 1ers for c >ery shot . The taper angles of the ro ] ler edge and the inser ヒ height of the shutt ] ecock are optimized tha[ the shuttlecock speeds arc maximized by the shooting simulation and the response surface apprDach . The validity of the optimum condition is confirmcd by 由 e correspDnding shot experiments using the two − roller type badmin[on machi ロ e ,
Badminton Machine, Simulat 加 , の timum Design, Spo 厂ts Enginee跏 9 ln this study , the shooting perfbrmance of the badminton machine with the twe rolters develeped by the author is examined . Finite element models of a feather shuttlecock and the badminton machine with two rollers are made , and the shot simulations proceed with the moving behavior and contact stress of the shuttleeock . The coeffieient of frictien is exarnined from the surfaces in contact with the shuttlecock and the roller in the analysis , From the analysis , lt is shown that the roller wlth a small diameter attains the lower spced of the shuttlecock than the other rollers for every shot . The taper angles efthe roller edge and the insert height ofthe shuttlecock are optimized that the shutt 正 ecock speeds are maximized by the shooting simulation and the response surface appreach 、 The validity ofthe optimum condition is confirmed by the corresponding shot experiments using the two − ro 星 Eer type badminton machine ,
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