Defining Extreme Sizes and Shapes for Body Armor and Load-Bearing Systems Design: Multivariate Analysis of U.S. Army Torso Dimensions.
Final rept. 1 May 96-23 Jan 97,
ARMY NATICK RESEARCH DEVELOPMENT AND ENGINEERING CENTER MA
Pagination or Media Count:
Percentile models commonly cited in materiel fitting requirements, such as fits the 5th through 95th percentile soldier, are inadequate definitions of the extremes in body sizes and shapes that must be fit to ensure the intended 90 accommodation of the Army user population. This report reviews shortcomings of the percentile methods in common use since the 1970s and applies multivariate statistical methods to the definition of extreme torso forms for load bearing and body armor design limit definitions. Principal Component Analysis PCA is applied to 12 torso dimensions from the U.S. Army Anthropometric Survey ANSUR database, and equal frequency ellipses EFE defining 90 accommodation are fit to plots of ANSUR subjects in the PCA space. Central and extreme forms for male only, female only, and malefemale requirements are derived from the EFE equations and presented in tables for use by clothing designers and engineers whose torso clothing and equipment must meet 5th to 95th percentile criteria. The study raises methodological issues and alternatives for follow up in future applied research.
- Human Factors Engineering and Man Machine Systems