FlyTact: A Tactile Display Improves a Helicopter Pilot’s Landing Performance in Degraded Visual Environments

Jansen, C.; Wennemers, Antoon; Vos, W.K.; Groen, Eric L.

doi:10.1007/978-3-540-69057-3_109

Cited by 12 publications

(7 citation statements)

References 3 publications

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“…Design and evaluation of haptic interfaces has been examined over a long period of time in safety-critical applications such as aircraft stall indicators, automobile steering [7,12], automobile collision warnings [5,6], pilot situation awareness [8,9,16] and navigational cueing [20,24]. In these papers, haptic feedback is used as a generalized alert to heighten the operator's awareness and direct their visual attention.…”

Section: Haptic Feedbackmentioning

confidence: 99%

A vibrotactile feedback approach to posture guidance

Zheng

Morrell

2010

2010 IEEE Haptics Symposium

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In this paper, we explore the use of vibrotactile haptic feedback to improve performance of a sensory-motor task. Our specific application is seated posture guidance. Poor sitting postures, over time, can lead to health concerns such as low back pain. We propose a real-time haptic feedback system that actively senses and guides a person to a desired posture. We have instrumented an ergonomic office chair with a simple system using 7 force-sensitive resistors (FSRs) for posture detection and 6 vibrotactile actuators ("tactors") for haptic feedback. When the chair detects that the subject is not sitting in the desired posture, one or more tactors will vibrate, directing the subject towards or away from a certain position. In a pilot study of 10 subjects (age 23.9±1.45, weight 71.1±13.6kg, height 175±11.2cm), 100% sat in the reference posture (upright) more often when there was haptic feedback than when there was not. Additionally, when haptic feedback was temporarily disabled without the subject's knowledge, all of the subjects continued to sit in upright or near-upright postures. These findings suggest that vibrotactile feedback can be an effective means of communicating musculoskeletal commands to the human sensory-motor system, especially for motor training and rehabilitation.

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Section: Haptic Feedbackmentioning

confidence: 99%

A vibrotactile feedback approach to posture guidance

Zheng

Morrell

2010

2010 IEEE Haptics Symposium

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“…Other applications include motor skill learning in sports [24], helicopter landing [11], obstacle avoidance [1], visual search [14], and awareness of other people [20]. Vibrotactile stimulation in these applications has typically been presented to the user's torso [20,27,29], back [11], legs [24], hands [14], or shoulders [24]. Recently, researchers have started to consider the head as a potential body site.…”

Section: Introductionmentioning

confidence: 99%

Gaze Cueing with a Vibrotactile Headband for a Visual Search Task

2017

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Augmented attention, assisting the user in noticing important things, is one of the ways human action can be enhanced with technologies. We investigated how vibrotactile stimulation given to the forehead could be used to cue gaze direction. We built a vibrotactile headband with an array of six actuators that presented short, tap-like cues. In the first experiment, the participant was instructed to look at the point on a horizontal line that they thought the vibrotactile cue was pointing to. Analysis of the participant's gaze points showed that for the majority there were statistically significant differences between cues from different actuators. This indicated that the six actuators could successfully direct the participant's gaze to different areas of the visual field. In addition, vibrotactile cueing of gaze direction could be used for directing visual attention and providing navigation cues with wearable headbands. To strengthen our findings, we investigated how effective the vibrotactile stimulation would be to cue gaze direction in a visual search task. Participant's were asked to find a deviant shape (a target) from a display full of simple shapes. The vibrotactile cueing implemented with the headband device was used to inform the participants of the approximate horizontal position of the target in three different experimental conditions. In the most informative condition, six actuators were used to inform the participant of the horizontal area where the target would be found, in the second condition two actuators were used to inform the participant of the target side on the display (left or right), and in the least informative condition no directional information was given. Analysis of the trial completion times showed that there were statistically significant differences between the least informative condition and the two other conditions. However, we did not find significant differences in trial completion times between the two conditions where information of the target location was given. This indicated that while the actuators could successfully direct the participant's attention to different areas of the visual field to help in the search task, the simple approach of just adding actuators and dividing the visual field to more sub-areas did not improve the results. The findings of this study showed that while there is potential in using vibrotactile cueing of gaze direction, more research is needed to fully exploit it.

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“…This particular phenomenon is termed ''brownout'' and its counterparts occurring above water and above snow are termed ''whiteout. '' Despite ongoing developments of various support aids for pilots in DVEs, including visual displays but also innovative tactile display techniques (Jansen et al 2008) of information gathered from traditional flight parameters or enhanced artificial images in, for instance, the terahertz range (Fiorino et al 2012) or from range-gated detection of active pulsed illumination (Roy et al 2012), Denotes Open Access content. there is still a lack of fundamental knowledge about the brownout process itself.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Rotorcraft Downwash Flow Field Measurements by Lidar-Based Wind Scanners with Agile Beam Steering

Sjöholm

Angelou

Hansen

et al. 2014

Journal of Atmospheric and Oceanic Technology

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A major risk to helicopters is the unexpected encounter of degraded visual environments in close-to-ground operations, where a loss of visibility often is caused by clouds of dust (brownout) or snow (whiteout) stirred up by intense downwash. The understanding of the phenomenon is limited, and there is a need for instruments that can measure flow fields on scales larger than a few meters with good resolution. This paper reports on the use of synchronized continuous-wave Doppler lidars for rotorcraft downwash flow field studies.Built from a modified ZephIR wind lidar and a double-prism arrangement for agile beam steering, a wind scanner-WindScanner-has been developed at the Department of Wind Energy at the Technical University of Denmark (DTU) Risø campus. The WindScanner measures the line-of-sight component of the airflow remotely and by rapid steering, the line-of-sight direction and the focus position; all points in space within a cone with a full opening angle of 1208 can be reached from about 8 m out to some hundred meters depending on the range resolution required.The first two-dimensional mean wind fields measured in a horizontal plane and in a vertical plane below a hovering search and rescue helicopter are presented. Since the line-of-sight directions of the two synchronized WindScanners were scanned within the plane of interest, the influence of the wind component perpendicular to the plane was avoided. The results also demonstrate the possibilities within less demanding flows encountered within complex terrain and wind-energy-related research for which the WindScanner technology primarily has been developed.

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FlyTact: A Tactile Display Improves a Helicopter Pilot’s Landing Performance in Degraded Visual Environments

Cited by 12 publications

References 3 publications

A vibrotactile feedback approach to posture guidance

A vibrotactile feedback approach to posture guidance

Gaze Cueing with a Vibrotactile Headband for a Visual Search Task

Two-Dimensional Rotorcraft Downwash Flow Field Measurements by Lidar-Based Wind Scanners with Agile Beam Steering

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