Title :
Optical variables and control strategy used in a visual hover task
Author :
Johnson, Walter W. ; Phatak, Anil V.
Author_Institution :
NASA Ames Res. Center, Moffett Field, CA, USA
Abstract :
Determinants of performance in a simulated hover task are examined. This task uses an extremely simplified vehicle model with only three degrees of freedom: longitudinal (fore/aft), lateral (left/right), and vertical (up/down). No rotational motions are simulated. Only one control manipulation is allowed, namely control of vertical craft velocity. The task uses a fixed base simulator with three adjacent windows each spanning a 40° visual field. Subjects view computer-generated scenes of either (1) a randomly textured and colored background plane 2000 ft below; (2) a regularly patterned see-through grid plane 1000 ft below; or (3) both the grid and the ground. Results show that vertical optical motion is a primary source of information for altitude control even with a forward buffeting disturbance. This is confirmed by the fact that the addition of peripheral visual cues does not improve performance
Keywords :
aerospace control; aerospace simulation; man-machine systems; position control; altitude control; fixed base simulator; forward buffeting disturbance; lateral; longitudinal; vertical; vertical craft velocity; visual hover task; Computational modeling; Grid computing; Information resources; Layout; Motion control; Optical control; Optical variables control; Ultraviolet sources; Vehicles; Velocity control;
Conference_Titel :
Systems, Man and Cybernetics, 1989. Conference Proceedings., IEEE International Conference on
Conference_Location :
Cambridge, MA
DOI :
10.1109/ICSMC.1989.71388
