Title
How to use body tilt for the simulation of linear self motion
Author
Groen, E.L.
Bles, W.
TNO Technische Menskunde
Publication year
2004
Abstract
We examined to what extent body tilt may augment the perception of visually simulated linear self acceleration. Fourteen subjects judged visual motion profiles of fore-aft motion at four different frequencies between 0.04-0.33 Hz, and at three different acceleration amplitudes (0.44, 0.88 and 1.76 m/s2). Simultaneously, subjects were tilted backward and forward about their pitch axis. The amplitude of pitch tilt was systematically varied. Using a two-alternative-forced-choice paradigm, psychometric curves were calculated in order to determine: 1) the minimum tilt amplitude required to generate a linear self-motion percept in more than 50% of the cases, and 2) the maximum tilt amplitude at which rotation remains sub-threshold in more than 50% of the cases. The results showed that the simulation of linear self motion became more realistic with the application of whole body tilt, as long as the tilt rate remained under the detection threshold of about 3 deg/s. This value is in close agreement with the empirical rate limit commonly used in flight simulation. The minimum required motion cue was inversely proportional to stimulus frequency, and increased with the amplitude of the visual displacement (rather than acceleration). As a consequence, the range of useful tilt stimuli became more critical with increasing stimulus frequency. We conclude that this psychophysical approach reveals valid parameters for motion driving algorithms used in motion base simulators..
Subject
Simulation
self motion perception
simulators
tilt co-ordination
visual-vestibular interaction
acceleration
article
body movement
calculation
controlled study
flight
force
human
human experiment
motion
perception
priority journal
psychometry
psychophysics
rotation
simulation
stimulation
tilting
vision
visual stimulation
Acceleration
Adult
Computer Simulation
Cues
Equipment Design
Female
Humans
Male
Models, Psychological
Motion
Motion Perception
Photic Stimulation
Posture
Psychometrics
Rotation
motion perception
self motion
spatial orientation
visual perception
tilt
vestibular perception
simulators
To reference this document use:
http://resolver.tudelft.nl/uuid:45c5363f-ec95-4665-b2f2-0f3f3b5c57ce
TNO identifier
13472
Source
Journal of vestibular research, 14, 375-385
Document type
article