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Status of WorldSID 50th Male and 5th Female
ATDs
Status of WorldSID 50th Male and 5th Female
ATDs
November 5, 2009
Dan RhuleNational Highway Traffic Safety Administration
Vehicle Research and Test Center
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WorldSID 50th MaleWorldSID 50th Male
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Background
NHTSA has participated in a collaborative effort to evaluate the WorldSID 50th
male
NHTSA worked closely with the WorldSID Task Group using 2 dummies provided by OSRP
several improvements were made to the dummy during the evaluation
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Objectives
Assess suitability of the WorldSID 50th male dummy for possible
incorporation into Part 572 of CFR
Drawing Package
Certification
Durability
Repeatability & Reproducibility
Biofidelity
User’s Manual (PADI)
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50th
Male Evaluation
Certification
Tests conducted before and after FMVSS tests to ensure dummy’s components are functioning properly
Evaluate components whose response are of consequence to the FMVSS application
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50th
Male Evaluation
Certification
ISO/CD 15830-2, rev. 25-Oct-04
Tests includes:– Head drop, frontal and lateral– Neck lateral flexion– Shoulder impact– Thorax impacts, with and without half-arm– Abdomen impact– Pelvis impact
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50th
Male Evaluation
Durability
Survive various test conditions and provide accurate response measures
Withstand repeated tests with minimal maintenance and repair
When problems are observed, either the test conditions or the dummy need to be modified
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50th
Male Evaluation
Durability Problems Addressed
Rib Damping Material
Pelvis DAS Docking Station
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50th
Male Evaluation
Repeatability & Reproducibility
Regulatory testing requires the dummy to have an acceptable level of R&R to instill confidence in the responses
Preliminary R&R evaluation– Certification tests– Sled tests
Preliminary R&R results are acceptable
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50th
Male Evaluation
Biofidelity
How well does dummy replicate the response of a human.
Biofidelity Rank System –
BioRank
Objectively quantifies biofidelity
Accounts for:– Internal biofidelity– External biofidelity
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Internal Biofidelity (IB)
Ability to replicate human internal response in a crash
Internal measurements used for injury criteria
Voa(t)
a(t)x(t)
a(t)
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External Biofidelity (EB)
Ability to replicate human loading of its environment in a crash
Measurements made externally to human and dummy
Vo
F(t)
F(t)
F(t)
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Ranked Body RegionsRanked Body Regions
HEAD
NECK
SHOULDER
THORAX
ABDOMEN
PELVIS
ES-2re WorldSID
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Response Measurement Comparison (R)Response Measurement Comparison (R)Fo
rce,
Ac c
ele r
atio
n, o
r Def
l ect
i on
Time
CadaverResponse
Corridor(±
STDEV)
CadaverMean
ti
ΔCt
DummyResponse
ΔDt
DCV
n
t 0(ΔDt
)2=
CCV (ΔCt
)2
n
t 0= RR==
* Morgan et al. 1986* Morgan et al. 1986
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Bio Rank Test Matrix & ReferencesTest Condition Test Name Reference200 mm Rigid Lateral Head Drop Head Test 1 ISO 9790 - Head Test 1
7.2 g Restrained Occupant Sled Neck Test 1 ISO 9790 - Neck Test 1 & Shoulder Test 2
12.2 g Restrained Occupant Sled Neck Test 3 ISO 9790 - Neck Test 3 & Shoulder Test 3
4.3 m/s Rigid Pendulum Lateral Thorax Impact Thorax Test 1 ISO 9790 - Thorax Test 1
6.8 m/s Rigid Wall Sled Heidelberg Sled Test
ISO 9790 - Thorax Test 5 & Pelvis Test 7
6.8 m/s Rigid Wall Sled Wayne State Sled Test
ISO 9790 - Abdomen Test 3 & Pelvis Test 10
6 m/s Rigid Pendulum Pelvis Impact Pelvis Test 1 ISO 9790 - Pelvis Test 110 m/s Rigid Pendulum Pelvis Impact Pelvis Test 2 ISO 9790 - Pelvis Test 2
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Bio Rank Test Matrix & References
Test Condition Test Name Reference4.4 m/s Padded Pendulum Lateral and Oblique Shoulder Impact
NHTSA Shoulder Test Bolte et al. 2003
2.5 m/s Rigid Pendulum Lateral and Oblique Thorax Impact
NHTSA Thorax Test Shaw et al. 2006
6.7 m/s Flat Rigid Wall Sled NHTSA LS FR Maltese et al. 20026.7 m/s Flat Padded Wall Sled NHTSA LS FP Maltese et al. 2002
6.7 m/s Rigid Abdomen Offset Sled NHTSA LS RAO Maltese et al. 2002
6.7 m/s Rigid Pelvis Offset Sled NHTSA LS RPO Maltese et al. 2002
8.9 m/s Flat Padded Wall Sled NHTSA HS FP Maltese et al. 2002
≈
90 Impactor Tests
≈
40 Sled Tests w/ 2 occupant
sled buck
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0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Neck Shoulder Thorax Abdomen Pelvis Overall
√R
WorldSIDES-2re
External Biofidelity
Better Biofidelity
Ext
erna
l Bio
rank
(EB
)
1.9
3.2
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0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Head Shou lder Thorax Abdom en Pelvis * O verall
√R
W orldSIDES-2re
* W /O Abdom en
Internal Biofidelity
Better Biofidelity
* w/o Abdomen
Inte
rnal
Bio
rank
(IB
)
1.6 1.7
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BioRank Conclusions & Observations
WSID overall internal and external biofidelity is better than ES-2re
WSID shoulder has improved ROM, measures displacement
WSID shoulder & thorax have more realistic motion and improved external oblique biofidelic response
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
O verall
W orldSIDES-2re
1.9
3.2
External Biofidelity
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
O verall
W orldSIDES-2re
1.6 1.7
Internal Biofidelity
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The WorldSID 50th
male dummy is more
biofidelic than the ES-2re dummy and its level of biofidelity is acceptable for
regulatory purposes.
WSID abdomen measures displacement
BioRank Conclusions & Observations
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50th
Male Evaluation
PADI
Procedures for Assembly, Disassembly, and Inspection
Illustrates how the dummy is put together, taken apart, instrumented, and inspected
Serves as reference to users
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50th
Male Evaluation
Drawing Package
Physical dimensions
Weight and CG of segments
Must be freely available to public without restrictions
Must not endorse any manufacturer
Issue: Onboard DAS
Public meeting
Suggestion: – specify these parameters by body region:
– Use CAD to determine» Mass» CG location » Mass Moment of Inertia (MMI)» Space (volume) where DAS can be mounted
– Electronic performance requirements– define acceptable tolerances based on simulations
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WorldSID 5th FemaleWorldSID 5th Female
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5th
Female Evaluation
NHTSA to acquire at least one dummy
Initiate Standard Evaluation
Drawing Package
Certification
Durability
Repeatability & Reproducibility
Biofidelity
User’s Manual (PADI)
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5th
Female Evaluation
APROSYS Work
Anthropometry
Biofidelity
Certification
Injury Risk Functions
ISO Biofidelity Ranking = 7.6
Apply NHTSA BioRank?
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Project Timing
'08Item Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3CertificationBiofidelityR & RDurabilityPADIDAS SpecsDrawing Package Part 572 NPRMReceive DummyCertificationBiofidelityR & RDurabilityPADIDrawing PacakgePart 572 NPRM
20132009 2010 2011 2012
50th
Mal
e5t
h Fe
mal
e
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Thank You
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Questions?