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Document Title | Rear impact dummy biofidelity | ||||||||
Reference Number | GTR7-06-03 | ||||||||
Date |
14 Mar 2011
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Source(s) | NHTSA | ||||||||
Rulemaking Area(s) | GTR No. 7 Head Restraints | ||||||||
Meeting(s) | |||||||||
Downloads | |||||||||
UNECE server | .pdf format | ||||||||
Excerpts from session reports related to this document | |||||||||
GTR7 | Session 6 | 28 Feb-1 Mar 2011 |
Presentation from Mr Moorhouse, US (GTR7-06-03): Biofidelity tests were undertaken at two pulses: 17 km/h 8.5 g, 202a type pulse;, and scaled up to 24 km/h 10.5 g. No so much difference in kinematics at the lower pulse, but some at the moderate pulse the PMHS ramped up a lot, H-III not at all, and BioRID and RID-3D somewhere in between. Detailed results for all three dummies were reviewed. The PMHS responses were phase aligned to get a more representative typical response for biofidelity comparison and the results assessed using the BioRank method for external, internal and total biofidelity. It was reported that the BioRID had either the best biofidelity (low-speed external and total biofidelity, moderate-speed internal biofidelity) or joint best biofidelity with RID3D (low-speed internal, moderate-speed external and total biofidelity). BioRID II therefore had the best overall biofidelity. BioRID also had the best overall repeatability, although all three dummies were acceptable. It noted that volunteers typically tense somewhat and may therefore have reduced motions compared with PMHS. Mr Moorhouse noted that this effect may affect the low-speed pulse data, but that the high speed is sufficiently high that occupant tensing or bracing would not be significant. |
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