title: Ground simulation of the G-excess illusion.
abstract: Objective. To observe the subjects' perception of orientation following certain head movements or change of simulator cab attitude in hypergravity (HG), and assess the feasibility of simulating G-excess illusion on the ground by a centrifuge-like Spatial Disorientation (SD) simulator. Method. 1.6 G force field was generated by planetary rotation of the simulator. Perception of orientation of the cab were collected from twelve male pilots' report following their heads pitch movements in pitch plane or cab attitude changes in roll plane under 1.6 G. Result. While making a pitch-up head movement, the pilots experienced a 63.8 degrees +/- 48.3 degrees pitch-up attitude change of the cab in pitch plane, and when the cab was tilted left 20 degrees, pilots experienced a tilt-left perception of 48.6 degrees +/- 39.4 degrees in roll plane. Conclusion. Although there's strong Coriolis effects onboard the SD simulator under 1.6 G, most pilots experienced the G-excess illusion. It demonstrated that it was feasible to use the centrifuge-like device to generate this kind of illusion on the ground.
authors.affiliation: Institute of Aviation Medicine, The Air Force, Beijing.
authors.forename: H B
authors.initials: HB
authors.lastname: Jia
authors.forename: L S
authors.initials: LS
authors.lastname: Yu
authors.forename: H Z
authors.initials: HZ
authors.lastname: Bi
authors.forename: K N
authors.initials: KN
authors.lastname: Wang
authors.forename: Z
authors.initials: Z
authors.lastname: Liu
authors.forename: S J
authors.initials: SJ
authors.lastname: Xie
mesh_terms: D000328:Adult; D002498:Centrifugation; D002681:China; D003312:Coriolis Force; D019416:Head Movements / Q000502:physiology*; D006801:Humans; D018471:Hypergravity; D007088:Illusions / Q000502:physiology* / Q000523:psychology; D008297:Male; D008889:Military Personnel; D009949:Orientation / Q000502:physiology*; D010037:Otolithic Membrane / Q000502:physiology; D012399:Rotation; D013028:Space Perception / Q000502:physiology