An Ergonomic Evaluation of the Extravehicular Mobility Unit (EMU) Spacesuit Hard Upper Torso (HUT) Size Effect on Mobility,Strength,and Metabolic Performance
Restricted accessResearch articleFirst published online September, 2014
An Ergonomic Evaluation of the Extravehicular Mobility Unit (EMU) Spacesuit Hard Upper Torso (HUT) Size Effect on Mobility,Strength,and Metabolic Performance
Introduction: The objective of this project was to develop a comprehensive methodology to assess the suit fit and performance differences between a nominally sized extravehicular mobility unit (EMU) spacesuit and a nominal +1 (plus) sized EMU. Method: This study considered a multitude of evaluation metrics including 3D clearances and pressure point mapping to quantify potential issues associated with using off-nominal suit sizes. Results: There were minimal differences with using a plus suit size. Discussion: Analysis of the results indicates that future suit size evaluations should consider this ergonomic approach to understand and mitigate potential suit fit and performance issues.
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References
1.
BorgG. (1990). Psychophysical scaling with applications in physical work and the perception of exertion. Scand. J. Work Environ. Health, 16 (Suppl 1), 55-58.
2.
National Aeronautics and Space Administration. (2012). Orion Multipurpose Crew Vehicle Program Human System Integration Requirements (MPCV 70024), Houston, TX: Author.
3.
NorcrossJ.R.LeeL.R.ClowersK.G.MorencyR.M.DesantisL.De WittJ.K.. (2009). Feasibility of Performing a Suited 10-km Ambulation on the Moon - Final Report of the EVA Walkback Test (EWT) (NASA/TP–2009–214796). Houston, TX: National Aeronautics and Space Administration.
4.
NorcrossJ.R.ClowersK.G.ClarkT.HarvillL.MorencyR.M.StroudL.C.. (2010). Metabolic Costs and Biomechanics of Level Ambulation in a Planetary Suit (NASA/TP-2010-216115). Houston, TX: National Aeronautics and Space Administration.
5.
WeirJ.B.deV. (1949). New methods for calculating metabolic rate with special reference to protein metabolism. J. of Physiol. 109, 1-9.
6.
WilliamsD.J.JohnsonB.J. (2003). EMU Shoulder Injury Tiger Team Report (NASA/TM-2003-212058). Houston, TX: National Aeronautics and Space Administration.
