Advanced Trajectory Design for the Tunnel-in-the-Sky Display: The Use Of Clothoids

Brandse, Jeroen; Mulder, Max

doi:10.2514/6.2004-5237

Cited by 13 publications

(14 citation statements)

References 6 publications

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“…To get more insight into the effects of clothoid trajectory augmentation on the timing and control of the roll-in maneuver, a simulation study was conducted. Two linear aircraft models, established for both a high-speed (cruise) and low-speed (approach) condition, were selected to examine the effects on performance caused by the varying aircraft kinematics and dynamics at different speeds (Brandse et al, 2004):…”

Section: Results Of An Off-line Simulation Studymentioning

confidence: 99%

“…Because both integral terms do not have a closed form solution, the set of parametric equations can be rewritten using a Maclaurin series expansion (Brandse et al, 2004). Using this result, the transition path in its most elementary form (i.e., omitting all higher order terms of the Maclaurin expansion) can be written as:…”

Section: The Clothoid Functionmentioning

confidence: 99%

“…First, the clothoid elements are connected with the circular elements (both clothoids and circle must have the same radius and orientation at the ends). Then, the clothoid-augmented circular arc is again translated along the line wp1-wp2 until it intercepts the line wp2-wp3 (Brandse et al, 2004), resulting in a continuous, smooth trajectory.…”

Section: Figurementioning

confidence: 99%

“…The straight elements are uniquely defined through their track, whereas the circular elements are specified at a certain radius, R, and the required change in track, χ. A best fit solution between these elements is computed based on the set of waypoints in the flight plan, for example, by translating the circular arc along the line wp1-wp2 until it intercepts the line wp2-wp3 (Brandse et al, 2004).…”

Section: Advanced Trajectory Designmentioning

confidence: 99%

“…The main goal of this article is to describe the design rationale and the results of an experimental evaluation of clothoid-augmented tunnel trajectories, allowing pilots to smoothly change the aircraft track (Brandse, Mulder, & Van Paassen, 2004). It is structured as follows.…”

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confidence: 99%

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Clothoid-Augmented Trajectories for Perspective Flight-Path Displays

Brandse

Mulder

2007

The International Journal of Aviation Psychology

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Perspective flight-path displays allow pilots to accurately follow complex curved approach trajectories. The current practice to define the tunnel reference trajectory as a concatenation of straight and circular segments, however, leads to difficult transition maneuvers between these segments, strongly contributing to pilot workload. To achieve a smooth interception, clothoid transition paths can be inserted between the straight and circular sections. A clothoid function defines a trajectory curvature that changes from 0 (a straight trajectory) to the desired curvature (the circular trajectory) in a certain amount of space traveled. Because the reference path better matches the natural aircraft response, the clothoid transients are hypothesized to make the task of flying complex curved approaches easier. A pilot-in-the-loop experiment, conducted in a fixed-base flight simulator, confirms this hypothesis and shows that clothoid-augmented trajectories yield improved path-following performance, require fewer pilot control actions, and result in higher comfort levels.Curved approach profiles are expected to increase the flexibility of air traffic management near large airports. Flying these inevitably more complex approaches results in a higher task demand load and requires a high level of pilot situation awareness. Improving the transfer of information to the pilot through intuitive, pictorial displays can mitigate these problems considerably. Research indicates that perspective flight-path displays, such as the tunnel-in-the-sky dis-

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Section: Results Of An Off-line Simulation Studymentioning

confidence: 99%

Section: The Clothoid Functionmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Advanced Trajectory Designmentioning

confidence: 99%

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confidence: 99%

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