首页> 外文会议>SAFE Association annual symposium >THE EFFECTS OF VARIABLE HELMET WEIGHT AND SUBJECT BRACING ON NECK LOADING DURING FRONTAL -GX IMPACT
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THE EFFECTS OF VARIABLE HELMET WEIGHT AND SUBJECT BRACING ON NECK LOADING DURING FRONTAL -GX IMPACT

机译:可变头盔重量和主体支撑对颈部造成颈部加载的影响

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摘要

Helmet-mounted systems (HMS), such as night vision goggles and helmet-mounted displays, are designed to enhance pilot performance. Using HMS, however, may also affect pilot safety by increasing the potential for neck injury during ejection due to the increase in dynamic forces generated in the cervical spine as a result of the change in helmet inertial properties. Pilot bracing techniques may also have an effect on ejection injury risk by allowing some of the neck forces to be off-loaded during the acceleration impact phases. A series of tests were conducted on the AFRL/HEPA Horizontal Impulse Accelerator (HIA) using human subjects to investigate the effects of helmet inertial properties and bracing techniques on human response to short-duration frontal impacts of variable magnitude. Head accelerations were measured and neck loads and moments were calculated to compare the head and neck responses using helmets of varying weight. Headrest loads were recorded to monitor and evaluate subject bracing. The neck loads and helmet weights were also extrapolated to higher levels in order to estimate injury thresholds for pilots wearing even heavier helmets at maximum seat accelerations. The results of this study will be used to establish head/neck injury criteria for helmet-mounted systems and to improve bracing techniques to minimize pilot injury during ejections.
机译:安装的系统(HMS),如夜视护目镜和头盔安装的显示器,旨在提高导频性能。然而,使用HMS也可以通过增加由于宫颈脊柱中产生的动态力的增加而产生颈部损伤的可能性,这也可能影响导频安全性。通过允许在加速冲击阶段期间允许一些颈部力来允许一些颈部力,导频支撑技术也可能对喷射损伤风险产生影响。使用人受试者在AFRL / HEPA水平脉冲加速剂(HIA)上进行一系列测试,以研究头盔惯性性质和支撑技术对人类反应对可变幅度的短持续时间的影响。测量头部加速度,计算颈部载荷和矩形,以使用不同重量的头盔进行比较头部和颈部反应。记录头枕载荷以监测和评估主题支撑。颈部载荷和头盔重量也被推断为更高的水平,以便在最大座椅加速下估计佩戴较重头盔的飞行员的伤害阈值。本研究的结果将用于建立头盔安装系统的头部/颈部损伤标准,并提高支撑技术以最小化喷射期间的试验损伤。

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