Dynamic Characteristics of Human Body at Jumping Motion by Bond graph

Abstract

Studies are being conducted to model jumping motion mechanically. Conventional studies have been conducted using only Muscle – Tendon Complex (MTC), which consists of muscle and tendon. In this study, in addition to MTC, modeling was carried out considering lower limbs including the foot, ankle joint and bone as one system. In the modeling of the system, the idea of bond graph using not only force but power was considered. So far, studies have generally been done on the idea of using the ankle as a pivot. In this paper, we analyzed the dynamic characteristics of the muscles and tendons of the lower limbs and the dynamic characteristics of the entire lower limbs during the jumping motion by the bond graph. As a result of comparing the analyzed values and the experimental values, it was clarified that the fulcrum of the foot is not the conventional ankle joint but the ball of the toe, which is a part of the toe. In addition, it has become possible to obtain the time change in tendon tension and displacement during jumping motion, as well as the discretely obtained movement velocity and power.