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Neck and body loads--"All the data is needed".

R P White¹, A M Bartol

¹Research and Experimental Simulation Department, Systems Research Laboratories, Inc., Dayton, OH 45440, USA.

Safe Journal

|July 1, 1991

Summary

Accurate measurement of multiaxis head and body accelerations is critical for aviator safety. A new calibration method using a 6x6 matrix improves load cell accuracy in manikins, crucial for evaluating protective gear.

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Area of Science:

Biomechanics
Aerospace Engineering
Human Factors Research

Background:

Multiaxis accelerations pose significant risks to aviators.
Existing six-component balance systems in manikins measure head and body loads.
Accurate load measurement is vital for assessing protective equipment effectiveness.

Purpose of the Study:

To address the limitations of simplistic load cell calibration in manikins.
To develop and present a novel test apparatus for complete manikin load cell calibration.
To demonstrate the necessity of a comprehensive 6x6 calibration matrix for accurate multiaxis loading data.

Main Methods:

Design and fabrication of a specialized test apparatus.
Application of calibration procedures adapted from six-component wind tunnel balance systems.
Development of a 6x6 calibration matrix relating forces and moments across three orthogonal axes.

Main Results:

The new apparatus and 6x6 matrix calibration yield significantly different results compared to simplistic methods.
The study highlights discrepancies between the new technique, manufacturer's matrix, and current simplistic procedures.
Accurate multiaxis loading information requires the complete calibration matrix.

Conclusions:

Simplistic calibration methods are inadequate for precise multiaxis load measurements in manikins.
The developed 6x6 calibration matrix ensures more accurate dynamic load data for aviator safety research.
This advanced calibration technique is essential for evaluating the impact of head encumbrances and other factors on aviator safety.

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