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Knowledge of geometric (lengths, widths, circumferences, angles) and mass-inertial characteristics of the segments of the human body is of key importance in human motion analysis. Under “motion analysis” we understand not only the analysis of human walk characteristics and parameters, A simplified geometrical model of the human body, Geometrical parameters of body segments, body segment simplified models and segment densities and masses. Segment masses are estimated by means of the regression equations of Z a t s i o r s k [8] and our results are given in the last column of Table 1, accounting for a total mass of an average Bulgarian male person ? = 77.7 kg. Based on the segment masses thus found, we optimize the anthropometric parameters of [6, 7] within a range of 10%, in order to attain a better agreement between the theoretically calculated values of segment masses and experimental data reported in literature, especially those published in [8]. Model generationin CAD Pro/Engineer? environment. A 16-segment model of the human body is generated in Pro/Engineer? environment (Fig. 1). The optimized anthropometric body dimensions (column 3 of Table 1) and density and mass given in the same table are used for the model design. ?Spherical joint (three degrees of freedom) – shoulder joint, hip joint, ankle-foot complex, wrist, neck, as well as links between the torso separate parts. The model inertial moments calculated in CAD Pro/Engineer environment and experimental data published in literature are compared in Table 2 and good agreement is established.
Tags : human motion analysis, segment model, body segment, geometrical parameters, body segments, regression equations, geometrical model, body dimensions, male person, degrees of freedom, model design, content knowledge, three degrees, human body, densities
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