Experimental analysis of human motion has been based on optical, magnetic, or electronic tracking techniques to determine body segment locations and orientations. The Average Coordinate Reference System (ACRS) method was developed to reduce experimental errors in human locomotion analysis. Experimentally measured kinematic data is used to conduct analysis in human modeling, and the model accuracy is directly related to the accuracy of the data. However, the accuracy is questionable due to skin movement, deformation of skeletal structure while in motion and limitations of commercial motion analysis systems.In this study, the ACRS method is applied to an optically-tracked segment marker system, although it can be applied to many of the others as well. Many previous studies adopted redundant marker systems, using four or five optical markers, instead of the basic three marker system to provide statistically better results of body segment position and orientation. In the ACRS method, each marker can be treated independently, as the origin of a local coordinate system for its body segment. Errors, inherent in the experimental process, result in different values for the recovered Euler angles at each origin. By employing knowledge of an initial, calibrated segment reference frame, the Euler angles at each marker location can be averaged, minimizing the effect of the skin extension and rotation. Using the proposed ACRS methodology the error is reduced when compared to the general Euler angle method commonly applied in motion analysis.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Averaged Coordinate Reference System Method for Human Motion Analysis


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Digital Human Modeling For Design And Engineering Conference And Exposition ; 1999



    Publication date :

    1999-05-18




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Averaged coordinate reference system method for human motion analysis

    Mun,J.H. / Freeman,J.S. / Rim,K. et al. | Automotive engineering | 1999


    Average Coordinate Reference System Method for Human Motion Analysis

    Mun, J. H. / Freeman, J. S. / Rim, K. et al. | British Library Conference Proceedings | 1999


    SATELLITE REFERENCE COORDINATE SYSTEM SETTING METHOD

    JEONG SUK YONG / CHO JI HYUN / OH MYOUNG SU et al. | European Patent Office | 2023

    Free access

    Refinement of a Depth Averaged Flow Model in Curved Channel in Generalized Curvilinear Coordinate System

    Onda, Shinichiro / Hosoda, Takashi / Kimura, Ichiro | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 2008

    Free access

    Reference Frames and Coordinate Transformations

    Ramnath, Rudrapatna V. | AIAA | 2010