The human torso includes three major segments, the thoracic (rib cage) segment, lumbar segment, and pelvic segment to which the thighs are attached. The JOHN model was developed to represent the positions and movements of these torso segments along with the head, arms, and legs. Using the JOHN model, a new seat concept has been developed to support and move with the torso segments and thighs. This paper describes the background of the biomechanically articulated chair (BAC) and the development of BAC prototypes. These BAC prototypes have been designed to move with and support the thighs, pelvis, and rib cage through a wide variety of recline angles and spinal curvatures. These motions have been evaluated with computer modeling and with initial experience of human subjects. Results from computer modeling and human subjects show that the BAC will allow a broad range of torso postures. In a BAC, people can choose between two basic modes of operation: The BAC prototypes demonstrate that seats can be designed which allow and support a broad range of seating postures and that seats can move with people as they change their posture.


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    Title :

    Biomechanically Articulated Chair Concept and Prototypes


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1997



    Publication date :

    1997-02-24




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Biomechanically Articulated Chair Concept and Prototypes

    Hubbard, R. / Gedraitis, C. / Society of Automotive Engineers | British Library Conference Proceedings | 1997


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    Hubbard,R. / Gedraitis,C. / Michigan State Univ.,US | Automotive engineering | 1997


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