Head and Helmet Biodynamics and Tracking Performance During Exposure to Whole-Body Vibration
Final rept. Oct 2002-Dec 2004
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN EFFECTIVENESS DIRECTORATE
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Helmet-mounted equipment is being designed to optimize military aircrew effectiveness. The objective of this study was to quantify the effects of head orientation and helmet weight distribution on head, helmet, and helmet slippage rotations, and tracking performance during exposures to fighter aircrew buffeting and multi-axis quasi-random vibration. For both exposures, significant increases in the roll displacements were observed with the SIDE orientation 40 deg elevation, 70 deg azimuth. Significant increases in the pitch displacements were observed with the UP orientation 40 deg elevation, 0 azimuth during exposure to buffeting, while both the FOR 0 deg elevation, 0 deg azimuth and UP orientations showed relatively high pitch motions with the multi-axis exposure. Significantly high performance degradation occurred with the SIDE orientation for two of the three weight distributions during aircraft buffeting, with minimal degradation observed with the multi-axis exposure. The results suggested that the SIDE orientation had the greatest influence on performance degradation, but the effect appeared to depend on the type of exposure.
- Anatomy and Physiology
- Stress Physiology
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