1
ProposalProposal for Head Restraint gtrfor Head Restraint gtrPhase 1 Dynamic Option for BioRID IIPhase 1 Dynamic Option for BioRID II
JASIC/Japan
Nov. 2007
2
Option1Head rotation with HY-III < 12 deg
Option2(Contracting Par ties choice)Head rotation with HY-III < 12 deg
or
Some cr iter ia with BioRID IIWaiting for EEVC study
Option3Dismissed
R-point with Backset < 45mm
Static Dynamic Option
OR*
Agreement at #142 WP29 in June 2007Agreement at #142 WP29 in June 2007
EC, Japan, and US Proposal Regarding Next Steps on Head Restraint GTR,WP29-142-23, was agreed at #142 WP29 in June 2007.
Contracting Par ties choice
or
H-point with Backset < 55mm
*: Manufacture choice
3
Reason;・Could be accepted by both USA and EC.• Could keep studying the global dummy and test method
harmonization in the future.・Could harmonize at least in 58 agreement countr ies.
Acceptance
Option
BioRID IIHy-III
--32
Not AcceptIndispensableUSAAcceptAcceptJapan
RecommendNot AcceptEC
1
Proposal for Phase1 Dynamic OptionProposal for Phase1 Dynamic Option
Japan suppor t either “Option 1” or “Option 2”, however , based on the following reasons , we believe “Option2” could be only the solution to compromise different opinion between US and EC.
or
4
Dynamic Test Option (2) for gtr Phase1
EEVCEEVC study result study result
NG
Yes
NO
DDynamic test with ynamic test with BioRID II BioRID II
choice of Contracting
Parties
Head rotation <[12]Yes
NGNO
Dynamic test with Hybrid III
HA-TAHA-TA
5
WhiplashPhenomenon
Phase I:Before Head/Head restraint contact
Phase II:AfterHead/Head restraintcontact
Phase III:Rebound
contactBack set extension flexion
Condition of Dynamic Test for gtr phase1
••Dynamic test for Head restraint gtr Dynamic test for Head restraint gtr Phase1Phase1 should be a alternative should be a alternative test for static Backset, and had better to equivalent to Backsettest for static Backset, and had better to equivalent to Backset..••It is considered with evaluate following phase I stage of whiplaIt is considered with evaluate following phase I stage of whiplash sh phenomenon.phenomenon.
6
Condition of Dynamic Test for gtr phase 1
•• BioRID II is promising with its high biofidelity to the human boBioRID II is promising with its high biofidelity to the human body, dy, but still need to study reproducibility, evaluation indicators, but still need to study reproducibility, evaluation indicators, reference values, test pulse, etc. for appropriate dynamic test.reference values, test pulse, etc. for appropriate dynamic test.
•• It was decided to study as gtr phase 2.It was decided to study as gtr phase 2.
T1G
MyFx
FzHead G
Reproducibility
BioRID-II
05
10HX Acc.
T1 Acc.
Fx
FzMy-Flx.
My-Ext.
HA-TA
Fz
Fx
T1 Acc.
NIC, Nkm, Nij, LNL, NIC, Nkm, Nij, LNL, NDCNDC……..
7
Head Movement up to HRCT (Prop. 1 and 2)
Pelvis pointPelvis point
①:Set BioRID II equivalent distance as R-point static backset
0
25
50
75
100
125
0 25 50 75 100
Time(ms)
Acce
lera
tion(
m/s
2 )
FMVSS
②:Measure the Head Center of Gravity Displacement relative to Pelvis point or T1 up to HRCT
Proposal for Dynamic Test for Option (2)
T1T1
or
8
Head Rotation up to HRCT (Prop. 3)
①:Set BioRID II equivalent distance as R-point static backset
0
25
50
75
100
125
0 25 50 75 100
Time(ms)
Acce
lera
tion(
m/s
2 )
FMVSS
②:Measure the Head Center Rotation angle relative to T1 up to HRCT
Proposal for Dynamic Test for Option (2)
T1T1
HA-TAHA-TA
9
Tr ialTr ial TestTestss
• Test samples
•10 seats
( 2 reactive HR)
• Test pulse
•IIWPG pulse *
* FMVSS202a pulse test will be conducted by the end of Dec.
Time[msec]
Acc
eler
atio
n[G
]
Time[msec]
Acc
eler
atio
n[G
]
10
Sample Sample ((Head C. G. Displacement relative to Head C. G. Displacement relative to Pelvis Pelvis andand T1 T1 ))
Relative Displacement [Head C.G.(2)-Pelvis(11)]
-20
0
20
40
60
0 30 60 90 120 150
Time [msec]
Rela
tive D
ispla
cem
ent
[mm
]
34
Relative Displacement [Head C.G.(2)-T1(6)]
-20
0
20
40
60
0 30 60 90 120 150
Time [msec]
Rela
tiv
e D
ispla
cem
ent [
mm
]
39
Head Contact
Head Contact
Relative Displacement [Head C.G.(2)-T1(6)]
-20
0
20
40
60
0 30 60 90 120 150
Time [msec]
Rela
tive D
ispla
cem
ent
[mm
]
11
Head Contact
Seat A (Normal) Seat B (Active)Relative Displacement [Head C.G.(2)-Pelvis(11)]
-40
0
40
80
120
0 30 60 90 120 150
Time [msec]
Rela
tive D
ispla
cem
ent
[mm
]
94
Head Contact
11
HA-TA
-60
-40
-20
0
20
40
0 50 100 150 200 250Time(ms)
Ang
le(d
eg)
BioRID-IIHybrid-IIIContact_BioRID-IIContact_Hybrid-III
HA-TA
-60
-40
-20
0
20
40
0 50 100 150 200 250Time(ms)
Ang
le(d
eg)
BioRID-IIHybrid-IIIContact_BioRID-IIContact_Hybrid-III
HA-TA
-60
-40
-20
0
20
40
0 50 100 150 200 250Time(ms)
Ang
le(d
eg)
BioRID-II
Hybrid-III
Contact_BioRID-IIContact_Hybrid-III
HA-TA
-60
-40
-20
0
20
40
0 50 100 150 200 250Time(ms)
Ang
le(d
eg)
BioRID-IIHybrid-IIIContact_BioRID-IIContact_Hybrid-III
Sample (Head Rotation angle relative to T1 )Sample (Head Rotation angle relative to T1 )Seat A (Normal)
Seat C (Normal)
Seat B (Active)
Seat D (Active)
HA-TAHA-TA
HA:Head Angle TA:Torso Angle
120
10
20
30
40
50
60
70
80
90
100
IIWPG(IIHS, Thacham) RATING
HE
AD
MO
VE
ME
NT
/ B
AC
KS
ET (
mm
)
-5
0
5
10
15
20
25
30
HE
AD
RO
TA
TIO
N
AN
GLE
(d
eg)
Relative toHP
ReactiveHR
Relative toT1
ReactiveHR
HeadRotation
ReactiveHR
Poor Marginal Acceptable Good
Comparison between IIWPG Rating and Proposed indicators““Head C.G. displacement relative to T1Head C.G. displacement relative to T1 [ Dynamic [ Dynamic Backset] Backset] ”” show better correlation with IIWPG rating than show better correlation with IIWPG rating than other indicators.other indicators.
HA-TAHA-TA
13
0
10
20
30
40
50
60
70
80
90
100
0 10 20 30 40 50 60 70 80 90 100
Static Backset(HRMD)
Head M
ovem
ent
wit
h I
IWP
G p
uls
e
Relative toT1Reactive HR
Passive HR
Comparison between Static Backset and[Dynamic Backset]
[ Dynamic Backset ] also have [ Dynamic Backset ] also have correlationcorrelation between between static backset, and show the effect of reactive and static backset, and show the effect of reactive and passive head restraint.passive head restraint.
14
Biomechanical BasisJARI Volunteer Mini Sled Test Ser ies
• Method– Freely Sliding Sled on a 10
deg. Ramp– Wooden Rigid Seat without
HR– Velocity = Approx. 8 km/h*
• Volunteers (Average ±S.D.)– 25 (3.8) years old Healthy
Male (n=6)– Height;1.75 (0.31) m, Mass;70
(6.1) kgDetail information were reported by K.Ono in 1998 and 1Detail information were reported by K.Ono in 1998 and 1999999 IRCOBI ConferenceIRCOBI Conference
[ Dynamic Backset ] L[ Dynamic Backset ] Limit value imit value studystudy
15
Test Set-Up and Condition• Dummies
– Hybrid-III (JARI)– BioRID-II Version “G”
(provided from EEVC WG12)– RID3D
(provided from EEVC WG12)
• Dummy Posture– Head X-axis = Horizontal– Hands are rest on the Cross Bar
• Sled Acceleration – See Figure -->
• Number of Tests– Three Repeat Tests were
Conducted in Same Condition• Seat
- Rigid seat without Head Restraint
-5
0
5
10
15
20
25
30
35
40
0 50 100 150 200 250 300Time (msec)
Acc
eler
atio
n (m
/s^2
)
RID3D Test 1RID3D Test 2RID3D Test 3Hybrid III Test 1Hybrid III Test 2Hybrid III Test 3BioRID Test 1BioRID Test 2BioRID Test 3Volunteer Mean
[ Dynamic Backset ] L[ Dynamic Backset ] Limit value imit value studystudy
16
-160
-140
-120
-100
-80
-60
-40
-20
0
20
40
0 50 100 150 200 250 300Time (msec)
Dis
plac
emen
t (m
m)
RID3D Test 1
RID3D Test 2
RID3D Test 3
Hybrid III Test 1
Hybrid III Test 2
Hybrid III Test 3
BioRID Test 1
BioRID Test 2
BioRID Test 3
Upper Limit
Lower Limit
HRCT zone
[ Dynamic Backset ] L[ Dynamic Backset ] Limit value imit value studystudyLimit value may be [40mm], if it is considered that head displacement until HRCT in case of near boarder of volunteer initial symptom pulse.
Linear X Disp. of O.C. to T1 (without Head Restraint)
17
Conclusion & Future action
““ Head C. G. displacement relative to T1Head C. G. displacement relative to T1””[ Dynamic Backset] could be reasonable indicator [ Dynamic Backset] could be reasonable indicator for head restraint gtr phase1 dynamic option for for head restraint gtr phase1 dynamic option for BioRID II.BioRID II.
TentativeTentative limit value limit value may [40mm]may [40mm]
HeadHead C. G. Displacement Relative to T1 up to HRCT C. G. Displacement Relative to T1 up to HRCT [Dynamic Backset] [Dynamic Backset] << [[4040mm] mm]
Appropriate limit value will Appropriate limit value will be studied by the endbe studied by the endof Dec. 2007.of Dec. 2007.
18
We believes ・Gtr should be globally harmonized technical requirements.・One common dynamic test could unify 4 different requirements
in phase 1.To study such one common appropr iate requirement, we strongly propose to establish WG for head restraint gtr phase 2. Japan will come forward as a candidate of technical sponsor .
Proposal to set up a new WG for Phase2Proposal to set up a new WG for Phase2
Head rotation w HY-III < 12 deg
R-point with Backset < 45mm
Static
Dynamic Option
orH-point with Backset < 55mm
OR
Dynamic
Phase 1Phase 1Phase 2Phase 2
Appropriate dynamic testAppropriate dynamic testrequirement w requirement w BioRIDBioRID IIII
Some cr iter ia with BioRID II or
19
ENDEND