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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