Abstract：
The occupant\'s posture can be changeable to an inadvertent or unintentional out-of-seat position (OOSP) depend on their convenience. Understanding for OOSP has been demanded, but it is not sufficient; especially when AEB is activated. The aim of the current study was to characterize the motion responses of an occupant in various OOSPs when AEB is activated and to identify if there were any additional risks of injury or discomfort to the occupant. The normal seat position (NSP) and three OOSPs were defined to compare the difference of human responses, and six healthy males were participated. Particularly, the maximum rotation angles of the neck in OOSP2 and OOSP3 differed significantly around 1.3 ± 0.3 and 1.4 ± 0.2 times higher respectively than from in the NSP (p < 0.05). Occupants assuming OOSP3 exhibited motion characteristics were not restrained effectively and characterized a hovering and falling upper body and a slipping pelvis. This study has identified, for the first time, a potential risk of injury or discomfort when AEB is activated while an occupant is in an OOSP. This study may serve as fundamental data for the development of safety system that can improve restraint and counteract any deterioration in occupant safety.
摘要：
乘员的姿势可以根据其便利性改变为无意或无意的座椅外位置(OOSP)。已经要求对OOSP的理解，但这还不够，特别是当AEB被激活时。当前研究的目的是表征AEB被激活时各种OOSP中乘员的运动反应，并确定是否存在乘员受伤或不适的额外风险。定义了正常座椅位置（NSP）和三个OOSP，以比较人类反应的差异，和六名健康男性参加。特别是,OOSP2和OOSP3中颈部的最大旋转角度分别比NSP高约1.3±0.3和1.4±0.2倍（p<0.05）。假定OOSP3表现出运动特征的乘员没有得到有效约束，其特征是上身盘旋和坠落以及骨盆滑动。这项研究已经确定，第一次,当乘员处于OOSP中时激活AEB时，可能存在受伤或不适的风险。这项研究可以作为开发安全系统的基础数据，该系统可以改善约束并抵消乘员安全性的任何恶化。
