Development of a biofidelic flexible pedestrian legform impactor type GTR prototype, I:​ development and technical evaluations

Konosu, Atsuhiro; Issiki, Takahiro; Takahashi, Yukou; Suzuki, Hideki; Been, Bernard; Burleigh, Mark; Hirasawa, Takahiro; Kanoshima, Hitoshi

Affiliations

¹Japan Automobile Research Institute, Japan

²Japan Automobile Manufacturers Association, Inc., Japan

³First Technology Safety Systems, The Netherlands and the United Kingdom

⁴Ministry of Land, Infrastructure, Transport, and Tourism, Japan

Abstract

Prototypes of the latest version of a biofidelic flexible pedestrian legform impactor (Flex-GTR-proto) were developed in November 2008. In this research several technical evaluations on the Flex-GTR-proto were conducted. As a result, fairly good repeatability and reproducibility of the Flex-GTR-proto, and comparability of the Flex-GTR-proto output under the symmetric right and left bumper corner impacts were observed (majorities of CV values are less than 3%).

As for the comparability between the Flex-GT and Flex-GTR proto, some differences were observed between them. Most of the maximum value ratios of Flex-GTR-proto relative to the Flex-GT are less than 1.1. The difference between the Flex-GT and Flex-GTR-proto has a chance to affect the injury threshold values; therefore, a following research has been investigating the threshold values for the Flex-GTR-proto using the ratios of the Flex-GT and Flex-GTR outputs and/or using the correlations between the Flex-GTR-proto and human lower extremities outputs which can be obtained from a computer simulation analysis.

Links

URL: http://www-nrd.nhtsa.dot.gov/pdf/esv/esv21/09-0145.pdf

Cited Works (4)

Year	Entry
1998	EEVC Working Group 17 Report: Improved Test Methods to Evaluate Pedestrian Protection Afforded by Passenger Cars. European Enhanced Vehicle-Safety Committee (EEVC); 1998.
2003	Konosu A, Tanahashi M. Development of a biofidelic flexible pedestrian legform impactor. Stapp Car Crash J. 2003;47:459-472. SAE 2003-22-0020.
2005	Konosu A, Issiki T, Tanahashi M. Development of a biofidelic flexible pedestrian leg-form impactor (Flex-PLI 2004) and evaluation of its biofidelity at the component level and at the assembly level. In: Proceedings of the SAE World Congress & Exhibition. April 11-14, 2005; Detroit, MI. Warrendale, PA: Society of Automotive Engineers. SAE 2005-01-1879.
2009	Been B, Burleigh M, Konosu A, Issiki T, Takahashi Y, Suzuki H. Development of a biofidelic flexible pedestrian legform impactor type GTR prototype, II: technical details. In: Proceedings of the 21st International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 15-18, 2009; Stuttgart, Germany.

Cited By (3)

Year	Entry
2009	Konosu A, Issiki T, Takahashi Y. Evaluation of the validity of the tibia fracture assessment using the upper tibia acceleration employed in the TRL legform impactor. In: Proceedings of the 2009 International IRCOBI Conference on the Biomechanics of Impact. September 9-11, 2009; York, UK.251-267.
2012	Takahashi Y, Ikeda M, Imaizumi I, Kikuchi Y, Takeishi S. Validation of pedestrian lower limb injury assessment using subsystem impactors. In: Proceedings of the 2012 International IRCOBI Conference on the Biomechanics of Injury. September 12-14, 2012; Dublin, Ireland.304-315.
2018	Isshiki T, Antona‐Makoshi J, Konosu A, Takahashi Y. Consolidated technical specifications for the advanced pedestrian legform impactor (aPLI). In: Proceedings of the 2018 International IRCOBI Conference on the Biomechanics of Injury. September 12-14, 2018; Athens, Greece.284-301.