Effects of Linear Perspective on Human Use of Preview in Manual Control

Abstract

Abstract-Due to linear perspective, the visual stimulus provided by a previewed reference trajectory reduces with increasing distance ahead. This paper investigates the effects of linear perspective on human use of preview in manual control tasks. Results of a human-in-the-loop tracking experiment are presented, where the linear perspective's horizontal and vertical deformation along the previewed trajectory were applied separately and combined, or were absent (plan-view task). Measurements are analyzed with both nonparametric and parametric system identification techniques, in combination with a quasi-linear human controller model for plan-view preview tracking tasks. Results show that reduced visual stimuli in perspective tasks evoke less aggressive control behavior, but that the human's underlying control mechanisms are still accurately captured by the model. We conclude that human controllers use preview information similar in planview and perspective tasks.

Effects of Preview Time in Manual Tracking Tasks

“…Fig. 6 also reveals some low-frequency lag in the measurements for SI tasks, which are not captured by the predictions; such lag been observed before in preview tracking [19], [22], but is not explicitly included in the model here for simplicity. …”

“…Here, we have established the effects of preview time in tracking task, while previous work has quantified the effects of CE dynamics [14] and the viewing perspective [22]. Other key variables that may trigger human adaptation, but which effects are still poorly understood, are the target signal bandwidth, availability of additional feedback cues (e.g., from vehicle rotations, optic flow, or physical motion), and available lane width (i.e., boundary-avoidance, opposed to our line-tracking task).…”

Manual Control Cybernetics: State-of-the-Art and Current Trends

“…Furthermore, our knowledge of human use of preview information must be extended from tracking to more realistic control tasks with preview, like car driving. Therefore, current work also investigates how HC preview control is affected by linear perspective [136] and inner feedback-loop closures due to the presence of inertial motion and a visual flow field.…”