Optical variables and control strategy used in a visual hover task

W. Johnson, A. Phatak
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引用次数: 18

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 degrees 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.<>
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视觉悬停任务中使用的光学变量和控制策略
在模拟悬停任务性能的决定因素进行了检查。该任务使用极其简化的车辆模型,只有三个自由度:纵向(前/后),横向(左/右)和垂直(上/下)。不模拟旋转运动。只允许一种控制操作,即控制飞行器垂直速度。该任务使用一个固定基座模拟器,其中有三个相邻的窗口,每个窗口跨越40度的视野。受试者观看计算机生成的场景(1)以下2000英尺的随机纹理和彩色背景平面;(2)下方1000英尺处有规则图案的透明网格平面;或(3)网格和地面。结果表明,即使存在前向抖振干扰,垂直光学运动也是高度控制的主要信息来源。事实证明,增加周边视觉线索并不能提高表现
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