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- Title
A centrifuge simulated push-pull manoeuvre with subsequent reduced +Gz tolerance.
- Authors
Xu, Yan; Li, Bao-Hui; Zhang, Li-Hui; Jin, Zhao; Wei, Xiao-Yang; Wang, Hong; Wu, San-Yuan; Wang, Hai-Xia; Wang, Quan; Yan, Gui-Ding; Deng, Lue; Geng, Xi-Chen
- Abstract
The push-pull effect (PPE) has been recognized as a deleterious contributor to fatal flight accidents. The purpose of the study was to establish a push-pull manoeuvre (PPM) simulation with a tri-axes centrifuge, studying the effect of this PPM on the +Gz tolerance, and to make this simulation suitable for pilot centrifuge training. The PPM was realized through pre-programmed acceleration profiles consisting of −1 Gz for 5 s followed by a +Gz plateau for 10 s. Relaxed +Gz tolerance recordings were obtained from 20 healthy male fighter aircraft pilots and 6 healthy male volunteers through exposure to pre-programmed profiles with and without previous −1 Gz exposure. A statistically significant decrease in +Gz tolerance was seen in all subjects after −1 Gz for 5 s exposure, 0.87 ± 0.13 G in the volunteer group and 0.95 ± 0.25 G in the pilot group. The ear opacity pulse as a +Gz tolerance endpoint criterion was sometimes found to be unreliable during the PPM experiments. The simulated PPM in this study elicited a PPE, which was obvious from the significant reduction in +Gz tolerance. The PPM profile appears useful to be included in centrifuge training.
- Subjects
AIRCRAFT accidents; AIR pilots; OPACITY (Optics); ACCELERATION (Mechanics); ENGINEERING tolerances; SIMULATION methods &; models
- Publication
European Journal of Applied Physiology, 2012, Vol 112, Issue 7, p2625
- ISSN
1439-6319
- Publication type
Article
- DOI
10.1007/s00421-011-2234-3