A Proposed Method to Rectify the Multi-Axis Neck Injury Criterion to Support Ejection System Validation

Abstract

The Air Force employs ejection seats in its high-performance aircraft. While these systems are intended to ensure aircrew safety, the ejection process subjects the aircrew to potentially injurious forces. System validation includes evaluation of forces against a standard which is linked to the probability of injury. The Muti-Axial Neck Injury Criteria (MANIC) was developed to account for forces in all six degrees of freedom. Unfortunately, the MANIC is applied to each of the three linear input directions separately and applies different criterion values for each direction. These three separate criteria create a lack of clarity regarding acceptable neck loading, leading to potential disputes during acquisition. Thus, the current research sought to adjust the MANIC formulation to provide clear, easy to interpret criterion values, a single MANIC formula independent of the direction(s) of input acceleration. We developed an optimization program that would run the survival analysis for each of the input axes.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2021
Accession Number
AD1136759

Entities

People

  • Ethan J Gaston

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Engineered Resilient Systems

DTIC Thesaurus Topics

  • Acquisition
  • Air Force
  • Aircrafts
  • Data Sets
  • Ejection
  • Ejection Seats
  • Engineering
  • Escape Systems
  • Human Factors Engineering
  • Literature Surveys
  • Military Aviation
  • Military Pilots
  • Night Vision
  • Seats
  • Standards
  • Test And Evaluation
  • Wounds And Injuries

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Aviation Science / Aeronautics.
  • Strategic Security Studies