Initial Observations on Perceptual Responses and Disturbance Produced by the Vertifuge.
Abstract
Perceptions of pitch and ratings of disturbance were obtained from six subjects with the Dynasim's Vertifuge cockpit configured in the centripetal heading. Verbal descriptions of transient responses during change in pitch followed expectations based on the combination of angular accelerations, cross- coupled angular accelerations, and resultant linear accelerations occurring during the transient phase of stimuli. Magnitude ratings of pitch during the steady-state phase of stimuli suggested the presence of adaptation effects that alter perceptions according to the order of the stimuli used. Further experimentation is needed to establish the significance of adaptation effects. Mean settings of the visual horizontal were fairly well predicted by the angle of the resultant of gravity and the centripetal vector calculated at the radial distance of the head from the center of rotation. Despite large pitch-up perceptions under some conditions, disorientation stress and/or nausea were not prominent; Vertifuge angular velocity was limited to 1.48 rad/s, which with a 30-deg pitch-up of the cockpit, produced perceived pitch-up attitudes approaching 90 deg in some subjects.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1991
- Accession Number
- ADA258153
Entities
People
- E. A. Molian
- F. E. Guedry
- J. M. Lentz
Organizations
- Naval Aerospace Medical Research Laboratory