Jia Hongbo, Yu Lishen, Bi Hongzhe, Wang Kuinian, Liu Zheng, Xie Sujiang
Vestibular Laboratory, Institute of Aviation Medicine, Air Force, Beijing, China.
Aviat Space Environ Med. 2002 Mar;73(3):191-3.
The G-excess illusion is becoming increasingly recognized as a cause of aviation fatalities. Studies of this illusion have looked at perception of subjects' orientation by moving the head during hypergravity, but independent of the pilot's head movement with respect to aircraft. This illusion can also occur by aircraft motion, but this has not been studied extensively.
The aim of this study was to investigate the subject's perception of orientation to the simulator cab attitude changes at 1.6 G without making any head movement with respect to the cab, and assess the feasibility of simulating the G-excess illusion on the ground with a centrifuge-like spatial disorientation simulator.
The 1.6-G force field was provided by the gravitoinertial force (GIF) of the simulator when it made an off-center (planetary) rotation at a constant velocity of 130 degrees x s(-1). Eleven subjects' perceptions of orientation of the cab attitudes were collected respectively by their report before and after certain cab tilt, in a roll plane of 1.6 G.
When the cab was tilted 20 degrees at 1.6 G, the subjects perceived the angle to be 48.6 +/- 39.4 degrees.
Most subjects experienced an exaggerated sensation to the cab attitude changes in roll plane. G-excess illusion can be generated in a centrifuge-like device on the ground.
过载错觉作为航空事故死亡的一个原因正日益受到关注。对这种错觉的研究着眼于在超重情况下通过头部移动来感知受试者的方位，但这与飞行员相对于飞机的头部运动无关。这种错觉也可能由飞机运动引发，但尚未得到广泛研究。
本研究旨在探究受试者在相对于驾驶舱不做任何头部移动的情况下，对1.6G时模拟器驾驶舱姿态变化的方位感知，并评估使用类似离心机的空间定向模拟器在地面模拟过载错觉的可行性。
当模拟器以130度×秒⁻¹的恒定速度进行偏心（行星式）旋转时，由其重力惯性力（GIF）提供1.6G的力场。在1.6G的侧倾平面内，通过11名受试者在驾驶舱进行特定倾斜前后的报告，分别收集他们对驾驶舱姿态方位的感知。
当驾驶舱在1.6G时倾斜20度，受试者感知的角度为48.6±39.4度。
大多数受试者对侧倾平面内的驾驶舱姿态变化有夸大的感觉。过载错觉可以在地面类似离心机的装置中产生。
