Evaluation of pedestrian protection structures using impactors and full-scale dummy tests

Ishikawa, Toshihiro; Kore, Haruhisa; Furumoto, Arihiro; Kuroda, Susumu

Pedestrian protection technology has drawn considerable affection. Three sub-system tests have been proposed by EEVC/WG17 to evaluate car front aggressiveness: 1) legform to bumper test, 2) upper legform to bonnet leading edge test and 3) headform to bonnet top test. In addition, a pedestrian full-scale dummy has been developed to evaluate the kinematics of a pedestrian. However, the differences between the sub-system tests and the full-scale dummy test have not been clarified yet.

The object of this study is to clarify the differences by comparing the results of sub-system tests and full scale dummy tests on the same impact condition in a compact car.

A typical compact car was selected and several kinds of car front specifications were implemented. A series of tests with combination of two impact speeds, 25 and 40km/h and several car front specifications was conducted using three impactors proposed by EEVC/WG17 and a full-scale dummy. A POLAR dummy developed by Honda R&D Co., Ltd. and GESAC was used.

The kinematics was compared by video analysis. The head accelerations, the accelerations and loads of femur, leg and others were compared by electronic measurements. It is clarified how the results of sub-system tests and full-scale dummy tests have been influenced by the difference of impact speed and car front specifications. And its reasons were discussed as well.

Year

Entry

2001

Akiyama A, Okamoto M, Rangarajan N. Development and application of the new pedestrian dummy. In: Proceedings of the 17th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 4-7, 2001; Amsterdam, The Netherlands.

1989

Harris J. A study of test methods to evaluate pedestrian protection for cars. In: Proceedings of the 12th International Technical Conference on Experimental Safety Vehicles (ESV). May 29–June 1, 1989; Göteborg, Sweden.1217-1225.

2001

Fredriksson R, Håland Y, Yang J. Evaluation of a new pedestrian head injury protection system with a sensor in the bumper and lifting of the bonnet’s rear part. In: Proceedings of the 17th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 4-7, 2001; Amsterdam, The Netherlands. SAE 2001-06-0089.

1998

EEVC Working Group 17 Report: Improved Test Methods to Evaluate Pedestrian Protection Afforded by Passenger Cars. European Enhanced Vehicle-Safety Committee (EEVC); 1998.

2000

Howard M, Thomas A, Koch W, Watson J, Hardy R. Validation and application of a finite element pedestrian humanoid model for use in pedestrian accident simulations. In: Proceedings of the 2000 International IRCOBI Conference on the Biomechanics of Impact. September 20-22, 2000; Montpellier, France.101-119.