船体動揺による人の転倒に関する基礎的研究

概要

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Recently, the problem for falls among elderly persons living in the community is being watched with keenest interest. The study of fall on the land has been examined by various authors from different points of view. But only a few research of fall on the sea have been published to date. So the study to prevent falls of these persons on board ship should be investigated immediately. In this study, we assume that the human body standing on the floor is expressed by inverted 3-link pendulum model in order to clear the mechanism of fall. In addition, the floor is moved to vertical direction by the inputted step force. The reaction of the body attached optical markers is recorded by the Digital Video Camera. We investigated some joint torques to maintain posture with the equation of motion which is induced from pendulum model by Lagrange's equation. It is found that the acceleration of the floor influenced joint torques.
2012-03-30