著者

石田 勝裕 渡邉 鉄也 田中 基八郎

出版者

一般社団法人 日本機械学会

雑誌

ジョイント・シンポジウム講演論文集:スポーツ工学シンポジウム:シンポジウム:ヒューマン・ダイナミックス 2007 (ISSN:24331309)

巻号頁・発行日

pp.172-177, 2007-11-13 (Released:2017-08-01)

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Lure fishing and fly-fishing have been positioned as sports deliberately different from the traditional Japanese fishing-style. In the case of fly-fishing, casting is the element which anglers must master in order to cast a fly, done so by using the weight of a line. This study uses experimental and computational analysis to investigate the dynamic behavior of a fly line. Fly-fishing constitutes various elements, but the importance that casting holds is extremely large. Fling speed, the casting process and the loop shape of the line while in flight are important for the proper presentation of flies. Moreover, the shape of a fly line is also important for a long cast or controlled cast. However, it is difficult to grasp the phenomenon or to make a numerical model because a fly line is an object of flexible string. Therefore, the most suitable casting method will be clarified from the viewpoint of sports engineering and human dynamics. In addition, measuring an angler performing movements with a flexible object such as a rod or a line is difficult. So establishing a method to measure the dynamic behavior precisely is also one of the purposes of this study. For the past study, casting that uses only one hand have been analyzed. However, casting that uses both hands is often done in the actual fishing field. In this paper, line's behavior is examined in double haul casting.

著者

川副 嘉彦 伊倉 良明

出版者

一般社団法人 日本機械学会

雑誌

ジョイント・シンポジウム講演論文集:スポーツ工学シンポジウム:シンポジウム:ヒューマン・ダイナミックス 2008 (ISSN:24331309)

巻号頁・発行日

pp.165-170, 2008-11-05 (Released:2017-08-01)

被引用文献数

2 2

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In the previous paper, we realized the simple self-sustained humanlike robust walking & running NANBA of humanoid biped robot GENBE based on distributed control of physical body in a martial art utilizing instability without ZMP (Zero Moment Point) control, which uses only small active power with simple chaotic limit cycle utilizing instability, further developing into autonomous walking, running, instantaneous turn and the simple autonomous shock avoidance during falling down and instantaneous rising up. Instability makes the natural movement. This paper made clear experimentally by using high-speed video camera the mechanism of robustness of humanoid biped robot GENBE who walks and runs everywhere even on the ice and snow.

著者

西田 光宏 礒部 真志 西脇 剛史

出版者

一般社団法人 日本機械学会

雑誌

ジョイント・シンポジウム講演論文集:スポーツ工学シンポジウム:シンポジウム:ヒューマン・ダイナミックス 2005 (ISSN:24331309)

巻号頁・発行日

pp.66-69, 2005-09-10 (Released:2017-08-01)

被引用文献数

1

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Exactly speaking, requirement properties in running shoes depend on the condition. Here, the condition indicates the runner's skill and running velocity. In the designing of running shoes for high speed, sole bending and torsional module are very important. Because large sole deformation causes energy loss in contact phase. In this study, propulsion efficiency calculated by the horizontal ground reaction force in running is proposed. The reduction in the propulsion efficiency is very effective for high speed running. The propulsion efficiency depends on the sole stiffness. In order to evaluate the propulsion efficiency, sole stiffness evaluation method based on eigenvalue analysis is introduced. After checking of the validity, the practical deigning of running shoes for high speed running is indicated.

著者

岡内 優明 前田 寛 島田 義生

出版者

一般社団法人 日本機械学会

雑誌

ジョイント・シンポジウム講演論文集:スポーツ工学シンポジウム:シンポジウム:ヒューマン・ダイナミックス 2000 (ISSN:24331309)

巻号頁・発行日

pp.209-212, 2000-11-08 (Released:2017-08-01)

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The purpose of this study was to obtain basic data for teaching ball handling in overhead passing in volleyball. The method used was simulation of a mass-elasticity-viscosity model consisting of hands and ball. First, we calculated the acceleration of the ball during contact with the hands through VTR images. As a result of comparing this acceleration with that of the simulation of the model, we found that the coefficients of elasticity and viscosity were adequate. The coefficients show that a skilled player absorbs the shock of the ball by finger elasticity soft in both trials, then accelerates the ball with wrist elasticity by changing stiffness depending on the height of set up. This is the reason skilled players can control the ball accurately. On the other hand, an unskilled player changes finger elasticity depending on the height of set up, and accelerates the ball by making wrist elasticity stiff, which results in less ball control.