人体各部の振動特性に関する実験的研究（自動車ドライバーのアームアングルの影響）

We present experimental results on the vibrational characteristics of the automotive sub-system comprising the human body, seat, steering wheel and pedals. The magnitude of the vibrations transferred to a driver from the seat, steering wheel and pedals have been measured with both random and sinusoidal excitations in the vertical, fore and aft directions at frequencies up to 20Hz. Measurement points were located on the surface of the head, chest, hip, thigh, shin, upper arm and lower arm. Eleven subjects were used to investigate the effect of some variable factors, such as arm angle, that may affect human dynamic behaviour. It was found that arm angle in driving posture has a substantial influence on the dynamic behaviour of the human body while driving. Some results are presented in the form of parametric graphs and tables.