114 ボールキック運動における逆-順動力学解析環境の構築(サッカーキックほか)

Abstract

In studies dealing with body movement and sports techniques, a method that is commonly used involves analysing joint torque using inverse dynamics based on kinematic data obtained through motion capture systems. On the other hand, another analytic technique that has become increasingly common entails generating movements and performing simulations on the basis of the force data for joint torque and the like; this technique employs forward dynamics to calculate the kinematic data. In general, however, the inverse dynamics and forward dynamics analyses are performed independently, and there have been almost no studies in which analysis is conducted by combining the two analyses. Therefore, in this study, an analytic environment was constructed for analysing the motion of kicking a soccer ball, in which inverse dynamics and forward dynamics were combined; the environment was constructed by using a formula manipulation language based on a simple two-dimensional double pendulum model. The results showed that although the kinematic data obtained from the motion capture system did not completely match the kinematic data obtained from the simulation in which forward dynamics was used, adequate agreement was observed between the two sets of data. In this study, it was considered that the development of an analytic environment that combined inverse dynamics and forward dynamics enabled a more refined analysis of the motion of kicking a ball.