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Methodology to Evaluate the Flail Space Model by Using Event Data Recorder Technology

机译：使用事件数据记录器技术评估连绵起伏空间模型的方法论

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摘要

The flail space model, which was developed in the 1980s, has become the standard method for estimating occupant risk in full-scale crash tests involving roadside safety features. The widespread availability of air bags and increased seat belt usage rates in today's vehicle fleet, however, raise serious questions concerning the validity of the model. Recent installation of event data recorders (EDRs) in a number of late-model vehicles presents a different perspective on the assessment of the validity of occupant risk based on the flail space model. EDRs are capable of electronically recording data such as vehicle speed, brake status, and throttle position just before and during an accident. Of particular interest is the EDR's ability to document the deceleration of a vehicle during a collision event. A methodology using EDR data to investigate the capability of the flail space model to predict injury to air bag-restrained occupants and results of a preliminary analysis based on implementation of the developed methodology on a limited data set are presented. Most of the analysis is limited to the occupant impact velocity because of insufficient data for evaluation of the occupant ridedown acceleration. The longitudinal occupant impact velocity was found to be a good predictor of overall injury, chest injury, and, to a lesser extent, lower extremity injury. For the head and upper extremity body region, the longitudinal occupant impact velocity is a weak predictor of injury.
机译：联s空间模型是在1980年代开发的，已成为在涉及路边安全特征的全面碰撞测试中估算乘员风险的标准方法。然而，在当今的车队中，安全气囊的广泛使用和安全带使用率的提高，引发了有关该模型有效性的严重问题。最近在许多新型车辆中安装了事件数据记录器（EDR），从而根据连the空间模型对乘员风险的有效性进行了评估。 EDR能够在事故发生之前和之中以电子方式记录数据，例如车速，制动状态和节气门位置。特别令人感兴趣的是EDR记录碰撞事件期间车辆减速度的能力。提出了一种使用EDR数据调查连space空间模型预测对安全气囊约束乘员的伤害的能力的方法，并基于有限数据集上开发的方法的实现进行了初步分析的结果。由于缺乏足够的数据来评估乘员下车加速度，因此大多数分析仅限于乘员撞击速度。人们发现，纵向乘员的撞击速度是整体伤害，胸部伤害以及下肢伤害程度较小的良好预测指标。对于头部和上肢身体区域，纵向乘员撞击速度是伤害的弱预测指标。

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