Abstract
Three Interim Night Integrated Goggle Head Tracking Systems (I-NIGHTS) were evaluated under sustained acceleration in the Dynamic Environment Simulator (DES) centrifuge located at Wright-Patterson AFB, OH. Ten subjects underwent three different high G profiles: a +8Gz maximum profile, a +4Gz maximum profile with mask dangling from the left side of the helmet, and a +4Gz maximum profile with the mask removed from the helmet. Four different helmets were tested; three (A, B, and C) were prototype I-NIGHTS helmets obtained from different manufacturers and the fourth helmet (D) was the standard HGU-55P. Comparisons between helmets A, B, and C revealed that subjects wearing helmet A experienced the greatest amount of image migration for all acceleration profiles. Helmet B was impacted most by “goodness of fit” during the conditions where the mask was either dangling from the helmet, or removed. Of the three I-NIGHTS helmets, helmet C performed the best in terms of helmet and image stability.
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