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Related Experiment Videos

Perception of the cabin attitude changes in hypergravity.

Hongbo Jia1, Lishen Yu, Hongzhe Bi

  • 1Vestibular Laboratory, Institute of Aviation Medicine, Air Force, Beijing, China. tsgsjh@blcu.edu.cn

Aviation, Space, and Environmental Medicine
|March 23, 2002
PubMed
Summary

The G-excess illusion, a cause of aviation fatalities, was simulated on the ground. Subjects experienced exaggerated orientation changes in a 1.6 G centrifuge, confirming its feasibility for study.

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Area of Science:

  • Aviation psychology
  • Human factors in aerospace
  • Vestibular system research

Background:

  • The G-excess illusion is a recognized factor in aviation accidents.
  • Previous research focused on head movements, not aircraft motion, during hypergravity.
  • The role of aircraft motion in inducing this illusion requires further investigation.

Purpose of the Study:

  • To investigate orientation perception during simulated aircraft motion at 1.6 G without head movement.
  • To assess the feasibility of using a centrifuge-based simulator to replicate the G-excess illusion on the ground.

Main Methods:

  • Eleven subjects were exposed to a 1.6 G force field using a centrifuge.
  • Subjects reported their perceived orientation of the simulator cab before and after tilt.

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  • Experiments were conducted in the roll plane at a constant rotational velocity.

    • Main Results:

    • At 1.6 G, a 20-degree cab tilt was perceived as 48.6 degrees.
    • This indicates a significant overestimation of the actual tilt angle.

    Conclusions:

    • Centrifuge-based devices can successfully simulate the G-excess illusion.
    • This finding supports the use of ground-based simulators for studying spatial disorientation in aviation.