Development of a new biofidelity ranking system for anthropomorphic test devices.
Development of a new biofidelity ranking system for anthropomorphic test devices.
复制标题
为拟人化测试设备开发新的生物保真度排名系统。
作者：
Heather H Rhule;M. Maltese;B. Donnelly;R. Eppinger;Jill K Brunner;J. Bolte
目前正在开发一种新的生物逼真度评估系统，并将其应用于三种侧面碰撞假人：WorldSID-alpha、ES-2和SID-HIII。该系统量化了（1）假人像尸体一样装载车辆的能力，“外部生物逼真度”，以及（2）假人复制最能预测损伤可能性的尸体反应的能力，“内部生物逼真度”。“排名系统使用尸体和假人的反应，从头部下降测试，胸部和肩部摆动测试，和全身雪橇测试。每个测试条件都分配了一个权重因子，该权重因子基于测试的人类受试者数量，以形成生物力学响应走廊，以及生物逼真度测试代表FMVSS 214、侧面NCAP（SNCAP）和FMVSS 201极碰撞环境的程度。对于每个响应要求，计算虚拟响应相对于平均尸体响应（DCV）的累积方差和平均尸体响应相对于平均值加一个标准差（CCV）的累积方差。DCV/CCV的比值表示虚拟响应与平均尸体响应的重复程度：比值越小，表明生物保真度越好。对于每个测试条件，取每个响应比较值（DCV/CCV）的平方根，然后将这些值取平均值并乘以适当的测试条件权重。然后将加权和平均比较值相加并除以测试条件权重之和，以获得每个身体区域的排名。每个假人获得外部生物逼真度的总体排名和内部生物逼真度的总体排名，包括每个身体区域的排名平均值。在研究的三个假人中，选定的比较试验数据表明，WorldSID-alpha原型假人表现出最佳的整体外部生物保真度，尽管所有假人都需要改进，以更好地复制人体运动学。所有三个假人估计潜在损伤评估的内部生物保真度水平相似。
A new biofidelity assessment system is being developed and applied to three side impact dummies: the WorldSID-alpha, the ES-2 and the SID-HIII. This system quantifies (1) the ability of a dummy to load a vehicle as a cadaver does, "External Biofidelity," and (2) the ability of a dummy to replicate those cadaver responses that best predict injury potential, "Internal Biofidelity." The ranking system uses cadaver and dummy responses from head drop tests, thorax and shoulder pendulum tests, and whole body sled tests. Each test condition is assigned a weight factor based on the number of human subjects tested to form the biomechanical response corridor and how well the biofidelity tests represent FMVSS 214, side NCAP (SNCAP) and FMVSS 201 Pole crash environments. For each response requirement, the cumulative variance of the dummy response relative to the mean cadaver response (DCV) and the cumulative variance of the mean cadaver response relative to the mean plus one standard deviation (CCV) are calculated. The ratio of DCV/CCV expresses how well the dummy response duplicates the mean cadaver response: a smaller ratio indicating better biofidelity. For each test condition, the square root is taken of each Response Comparison Value (DCV/CCV), and then these values are averaged and multiplied by the appropriate Test Condition Weight. The weighted and averaged comparison values are then summed and divided by the sum of the Test Condition Weights to obtain a rank for each body region. Each dummy obtains an overall rank for External Biofidelity and an overall rank for Internal Biofidelity comprised of an average of the ranks from each body region. Of the three dummies studied, the selected comparison test data indicate that the WorldSID-alpha prototype dummy demonstrated the best overall External Biofidelity although improvement is needed in all of the dummies to better replicate human kinematics. All three dummies estimate potential injury assessment with similar levels of Internal Biofidelity.