Accession Number:



Warrior Injury Assessment Manikin (WIAMan) Generation 1 Anthropomorphic Test Device (ATD) Positioning in Highly Reclined and Other Alternative Postures

Descriptive Note:

[Technical Report, Technical Report]

Corporate Author:

DEVCOM Data and Analysis Center

Report Date:


Pagination or Media Count:



The initial Warrior Injury Assessment Manikin WIAMan project primarily focused on developing biofidelity response corridors and injury assessment risk curves associated with a reference seating environment that consisted of a vertical seat back, horizontal seat pan, and horizontal floor. Occupant posture consisted of an upright torso, level thighs, and 90 hip, knee, and ankle angles. This 90-90-90 posture and the associated seating condition were identified as the baseline seating environment for the Warfighter around which the WIAMan Generation 1 Gen1 anthropomorphic test device ATD was designed. To determine if the initial design posture could be expanded, a series of tests was conducted positioning the WIAMan Gen1 in a reconfigurable seating environment capable of highly reclined seat-back angles. The goal of this test series was to determine at what angles, if any, nonbiofidelic behaviors emerge in the ATD across a range of reclined postures. Reclining the torso past the design posture was found to force the pelvis flesh to tilt up, making it difficult to match the targeted pelvis location point. Additionally, the ATD was unable to achieve the target Frankfurt plane angle tests with a 45 seat-back angle in the postures proposed. However, the WIAMan Gen1 was able to reproduce the mean posture within 1 standard deviation of the proposed targets for postmortem human surrogate PMHS testing for the majority of targets. This suggests that differences in ATD and PMHS posture are unlikely to impede a comparison of WIAMan Gen1 responses and PMHS injuries in matched pair analysis.

Subject Categories:

  • Anatomy and Physiology

Distribution Statement:

[A, Approved For Public Release]