Child Restraint Research

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Arnold Elliott
8 years ago
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1 Child Restraint Research Transport Canada Transportation Development Centre Aastra Aerospace 1

2 Project Evolution Joint FAA/TC testing in 1989 Recommendation: R & D dedicated to the design of a restraint system for infants and small children traveling in aircraft be conducted without delay. Objective was to determine the feasibility of developing a CRS which meets the needs of the users, the airline industry, and the regulators. 2

3 Drivers Request for approval of Belly Belt Operational problems associated with CRS Search for innovative solution Child Safety System - not necessarily a seat 3

4 RFP Project Initiation Results - No CRS manufacturers Successful bidder - AASTRA Aerospace Engineering - since evolved into a telecommunications company 4

5 Design Decisions Who provides? What standard to use? Modal vs Multi-modal Aviation Standards or Automotive Standards - for materials & machining Certification - Self certified or approved? 5

6 Standard CMVSS 213 used in absence of aviation specific standard CMVSS 213 similar to FMVSS 213 except for more conservative head excursion limit of 28.4 inches (720 mm) vs 32 inches (813 mm) - generates a requirement for a top tether Additional requirements for aviation environment 6

7 Fit Function effectiveness 7

8 Current Performance Criteria per FMVSS-213 8

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17 AVIATION VS AUTOMOTIVE WIDTH BETWEEN ARMRESTS BASE - DIMENSIONS SEAT PITCH INSTALLATION METHODS INSTALLATION FREQUENCY ANCHORAGE POINTS 17

18 Additional Requirements Simple and obvious to install in a/c Easy and quick to adjust Compact - minimize stowage space Easy to maintain Compatible with aircraft seats Effective in aviation environment Must provide occupant protection 18

19 PROJECT EVOLUTION MODULAR FLOTATION CONCEPT NON-FLOATING, FOLDING SYSTEM, (MARK I PROTOTYPE) OPTIMIZED FOLDING SYSTEM (MARK II PROTOTYPE, ACSS) MARK II A 19

20 BACK BASE WEDGE 20

21 WEDGE BACK BASE 21

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29 95 tests inches fwd of CRP CRP 29

30 DYNAMIC TESTS CHILD TEST RESULTS (CMVSS 213) CRITERION MAXIMUM ACSS TEST PERMISSIBLE VALUE MAX. CHEST ACCEL. 60 g's over 3 msec 45 g's : passed HEAD EXCURSION LIMIT 28.4" 22.1" : passed HEAD INJURY CRITERION (HIC) : passed INFANT TEST RESULTS (CMVSS 213.1) CRITERION REQUIREMENT ACSS TEST HEAD EXCURSION Forwardmost Point passed LIMITS Readwardmost Point passed ROTATION LIMIT Carrier Seatback angle: passed < 70 degrees (43 degrees) STRUCTURAL INTEGRITY No injurious surfaces passed AND SAFETY 30

31 DYNAMIC TESTS FAA TEST CASES TEST NO CAMI Run No. A95059 A95060 A95061 A95062 A95063 Single Row Child, BCA Child, WCA n/a Child. WCA n/a Double Row Row 1 n/a n/a Infant, BCA n/a empty Row 2 Child, WCA Infant, BCA 31

32 DYNAMIC TEST RESULTS Infant Test Results (CAMI) Test No: A95061 A95063 CRITERION: No excessive forward pass pass translation or rotation Secure restraint of ATD pass pass Protection of ATD's head pass pass Maintain structural integrity pass pass 32

33 DYNAMIC TESTS Child Test Results (CAMI) Test No. A95059 A95060 A95061 A95062 CRITERION Prevent excessive head pass pass pass pass excursion Chest accel.: data not (pass: < 60 g's) pass pass pass available HIC : data not (pass: <1000) pass pass pass available Secure restraint of ATD pass pass pass pass Maintain structural integrity pass pass pass pass 33

34 1997 CAMI TESTS MKIIA TEST SERIES - FWD FACING - 3 RUNS - AFT FACING - 2 RUNS DIFFERENCES IN TEST PROCEDURE - SEAT BACK POSITIONING - TYPES OF HARNESSES - ANCHOR POINTS!!! 34

35 95 tests inches fwd of CRP 97 tests inches fwd of CRP CRP 35

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40 Example of poor interface between CRS and passenger seat 40

41 1998 CAMI TESTS - MKIIA PRODUCTION VERSION TEST SERIES - FWD FACING - AFT FACING DIFFERENCES IN TEST PROCEDURE - PAX SEAT BACK - PRE-TENSIONING 41

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43 RESULTS Objective was to determine the feasibility of developing a CRS which meets the needs of the users, the airline industry, and the regulators Preliminary results indicate the objective is feasible? Where to from here? 43

44 STATUS Intellectual Property rights recovered 25 devices manufactured Concurrent activity - development of a standard suitable for aviation - currently a SAE S-9 activity - AS5276 Validation testing for AS 5276 modifications to CMVSS test bench 44

45 Proposed New SAE Aerospace Standard (AS 5276A in progress) SAE S9 Committee developing an AS for child restraints used with transport airplane passenger seats. Based on test procedures and methods of FMVSS-213, with modifications to test fixtures. Specifies a 16g test condition, airplane type belts and belt anchor locations. Pass/fail criteria to limit head excursion to 26 inches forward of seat CRP. 45

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47 sn io sne is xar ohcnatl eb pal. det on esi in mm rwe th o ssel imdll nu A. A te on ) PR (Ct mm018 =ti mm519 =ti 50 in opecner fe ern io hsuc iml n io sr ucxe dr a iml n io sr ucxe dr a. B 072 te on 551 rw of dae H rw of eenk is xat o iv p kcabt er tu ix Ft aes aes312- SSVMF Proposed SAE AS Test Method... CRP-Belt Anchor Distance = 4.5 in. 47

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CASPER CHILD ADVANCED SAFETY PROJECT FOR EUROPEAN ROADS. Car Technology. SPEAKER: Britta Schnottale BASt. CASPER and EPOCh Final Workshop 13 th -15

CASPER CHILD ADVANCED SAFETY PROJECT FOR EUROPEAN ROADS. Car Technology. SPEAKER: Britta Schnottale BASt. CASPER and EPOCh Final Workshop 13 th -15 CHILD ADVANCED SAFETY PROJECT FOR EUROPEAN ROADS BASt and EPOCh Final Workshop 13 th -15 th March 2012 Berlin, Germany Content Introduction Accident data ISOFix Safety devices - Pre-tensioner and Load