The issue of car-to-pedestrian impact safety has received more and more attention. For leg protection, a legform impactor with 2 degrees-of-freedom (DOF) proposed by EEVC is required in current regulations for injury assessment, and the Japan Automobile Manufacturers Association Inc. (JAMA) and Japan Automobile Research Institute (JARI) have developed a more biofidelic pedestrian legform since 2000. However, studies show that those existing legforms may not be able to cover some car-to-pedestrian impact situations. This paper documents the development of a new pedestrian legform with 4 DOFs at the knee-joint. It can better represent the kinematics characteristics of human knee-joint, especially under loading conditions in omni-direction impacts. The design challenge is to solve the packaging problem, including design of the knee-joint mechanisms and layout of all the sensors in a limited space of the legform. Furthermore, reusable elements are used to achieve the joint stiffness requirements instead of destructive elements used in the EEVC 2-DOF legform. A prototype of the 4-DOF legform has been manufactured based on the design. The preliminary impact tests against bumper systems are also introduced in this paper.


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    Title :

    Development of a Legform Impactor with 4-DOF Knee-Joint for Pedestrian Safety Assessment in Omni-Direction Impacts


    Additional title:

    Sae Technical Papers


    Contributors:
    Nie, Bingbing (author) / Huang, Jun (author) / Zeng, Long (author) / Zhou, Qing (author) / Xia, Yong (author)

    Conference:

    SAE 2011 World Congress & Exhibition ; 2011



    Publication date :

    2011-04-12




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Development of a Legform Impactor with 4-DOF Knee-Joint for Pedestrian Safety Assessment in Omni-Direction Impacts

    Huang, J. / Nie, B. / Zeng, L. et al. | British Library Conference Proceedings | 2011



    Development of a Non-Frangible Pedestrian Legform Impactor

    Marous, J. R. / Reynolds, D. B. / Longhitano, D. C. et al. | British Library Conference Proceedings | 1998


    Development of a Biofidelic Flexible Pedestrian Legform Impactor

    Konosu, Atsuhiro / Tanahashi, Masaaki / Japan Automobile Research Institute et al. | SAE Technical Papers | 2003


    Development of a Biofidelic Flexible Pedestrian Legform Impactor

    Konosu, A. / Tanahashi, M. / Society of Automotive Engineers | British Library Conference Proceedings | 2003