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TECHNICAL PAPERS: Joint/Whole Body

Dynamics of the Head-Neck Complex in Response to the Trunk Horizontal Vibration: Modeling and Identification

[+] Author and Article Information
Mohammad A. Fard, Tadashi Ishihara, Hikaru Inooka

Graduate School of Information Sciences, Tohoku University, Aobayama 01, Aoba-ku, Sendai Miyagi, 980-8579, Japan

J Biomech Eng 125(4), 533-539 (Aug 01, 2003) (7 pages) doi:10.1115/1.1589777 History: Received April 07, 2002; Revised February 13, 2003; Online August 01, 2003
Copyright © 2003 by ASME
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References

Figures

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Schematic drawing of the experiment design. The body harness, which has been used to fix the trunk of the seated human body to the seatback, and the positions of the sensors are also shown.
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(a) A two-degrees-of-freedom model of the HNC with its schematic drawing. (b) θ1 and θ2 indicate the angular displacements of the neck and the head with respect to the vertical axis, respectively.
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The mean values of the coherency functions for four volunteers. Each graph belongs to one volunteer.
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Comparison of the experimental (Exp.) and simulation (Sim.) results of the magnitudes of the transfer functions, between the HNC angular velocity (rad/sec) and the trunk horizontal acceleration (m/sec2 ), for four volunteers. Note that the # sign indicates the volunteer number.
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Comparison of the experimental (Exp.) and simulation (Sim.) results of the phases of the transfer functions, between the HNC angular velocity (rad/sec) and the trunk horizontal acceleration (m/sec2 ), for four volunteers
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Comparison of the experimental (Exp.) and simulation (Sim.) outputs (lower panel) for one volunteer (# 2) in the time domain when the input (the upper panel) is a Gaussian random vibration (validation of the model)

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