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Development and testing of a more realistic pelvis for the hybrid III 6-year-old ATD
Objective: Design and test a new pelvis for the Hybrid III 6-year-old (6YO) anthropometric test device (ATD) with a more humanlike bone structure, flesh contour, and flesh stiffness intended to provide more realistic interaction with belt restraints. Methods: Target geometry for the new pelvis bone...
Effects of vehicle features on CRS installation errors
This report documents a study of how vehicle features contribute to CRS installation errors. Thirty-two subjects were recruited based on their education level (low or high) and experience with installing CRS (none or experienced). Each subject was asked to perform four child restraint installations...
Labels, instructions and features of convertible Child Restraint Systems (CRS) evaluating their effects on CRS installation errors.
This report documents a study of how CRS features, labels, and instructions contribute to CRS installation errors. Task 1A focused on assessing different physical features of 16 convertible CRS, while Task 1B evaluated baseline and modified versions of labels and instructions for two CRS models....
Evaluation of Hybrid-III 6YO ATD chest jacket shape and position
In previous work, belt fit on the Hybrid-III six-year-old (6YO) anthropomorphic test device (ATD) was found to depend on the positioning of the chest jacket of the ATD. Moreover, differences were noted between jackets manufactured by Denton-ATD and First Technology Safety Systems (FTSS). The...
Effect of realistic vehicle seats, cushion length, and lap belt geometry on child ATD kinematics
This series of sled tests examined the effect of using real vehicle seats on child ATD performance. Cushion length was varied from production length of 450 mm to a shorter length of 350 mm. Lap belt geometry was set to rear, mid, and forward anchorage locations that span the range of allowable lap...
Factors affecting tether use and misuse
This project investigated factors relating to tether use and misuse. Volunteer testing was performed with 37 subjects on 16 different vehicles using 2 forward-facing child restraints (Britax Marathon 70 or the Evenflo Triumph), with each subject performing 8 child restraint installations on a set...
Assessing the restraint performance of vehicle seats and belt geometry optimized for older children
In a previous study, a computational model of child occupants 6 to 10 years old (YO) was validated using data from a sled test series with the 6YO and 10YO Hybrid III ATDs. Simulations using this model were used to identify characteristics of a vehicle seat and belt geometry that would improve...