Joe R. Berry

Date of Award


Document Type


Degree Name

Master of Science in Systems Engineering


Department of Systems Engineering and Management

First Advisor

Jeffrey C. Parr, PhD.


Modern Helmet Mounted Displays (HMD) provide pilots with increased operational capabilities that are essential. Increasing HMD mass in addition to the Air Force’s (AF) expanded range of accepted pilot size increases the risk for neck injuries during ejection. This increase drove Parr et al. (2014) to develop improved neck injury criteria, the MANIC, that increases objective interpretation of ejection system qualification testing results and provides early input to HMD and escape system design. The criteria’s defined human risk curves provide clear implementation guidance for the MANIC with the Air Force Life Cycle Management Center’s (AFLCMC) requirement for ejection systems to maintain risk of AIS 2+ injury below 5%. All AF ejection systems use Anthropometric Test Devices (ATD) for proof of concept and full system developmental testing. Kinematic differences between human and ATD MANIC responses to accelerative input necessitate a transfer function for ATD data before utilizing the MANIC. This study generates a human to ATD transfer function for the MANIC Gz using linear regression and statistical analysis. The development of a transfer function makes human-centric neck injury criterion directly applicable to dynamic testing with ATDs as part of the developmental and operational testing of escape systems and HMDs.

AFIT Designator


DTIC Accession Number