Abstract
Trains, cars, motorbikes, bicycles, etc. are mentioned as the main transportation devices in everyday life. However, we are obliged to walk when we move through places such as a retail power center and an airport. For this background, personal mobility vehicles (PMVs) which are the vehicles for individual usage are expected to be used in pedestrian spaces. A PMV is compact and can move through narrrow spaces. In this study, we aim to develop a four-wheel stand-up type vehicle for people who cannnot walk longer because of the pain of foot or waist although they are able to walk for a short distance. By using Multibody Dynamics, the coupled model of human and vehicle is constructed. The vehicle is expressed by 3 rigid bodies (front tire, rear tire and body) and a human is expressed by 8 rigid bodies (foot, lower leg, femoral, body, head, upper arm, lower arm, and hand). The vehicle of coupled model is accelerated and decelerated. By the numerical simulation, the behavior of the center of gravity of a human and fall of a vehicle are simulated. As a result, the threshold of acceleration which human can keep standing posture and the threshold of wheelbase which a vehicle doesn't fall during acceleration and braking operation were shown.
