304 Motion Analysis of the Japanese Bow for Archery

Abstract

This paper describes the motion analysis of the Japanese bow made from carbon fibers with the linen string for archery. The final target of this study is to establish the realistic relationship between human body and the bow with the string in giving instruction and to propose a suitable text book for players to keep healthy. In this case, a vibration characteristic of the bow with the string is noticed due to experiments and calculations by the Rigid Motion Analysis. The calculation model consists of rigid bodies and rotational springs. When the string of the bow is drawn and released, displacements and vibration characteristics of the upper and lower of the bow are measured by video-camera and calculated by computer. A good coloration between experiments and calculations is taken. It is considered in the next step to make human body models with some kinds of the skeleton.