Flight experiment of pilot display for search-and-rescue helicopter

Funabiki, Kohei; Tsuda, Hiroka; Iijima, Tomoko; Nojima, Toshio; Tawada, Kazuho; Yoshida, Takashi

doi:10.1117/12.819096

Cited by 6 publications

(6 citation statements)

References 6 publications

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“…As the invariants in the optic flow can be expressed as angles and angular rates, pilots infer tau to close gaps when moving from a current hovering position to an adjacent, desired one or when coupling an obstacle-bound trajectory onto one that safely evades the obstacle. For a given motion gap, the instantaneous time to contact τ is the ratio of the negative distance to the target x(t) and the closure rateẋ(t), Equation (5).…”

Section: B Optic Flow and Taumentioning

confidence: 99%

“…To mitigate the risks of low-level helicopter flight in DVE, the information from board-mounted sensors and databases can be fused to reconstruct a virtual image of the surroundings. A virtual terrain grid can then be used to restore part of the degraded optic cues by means of an augmented reality (AR) display with semi-transparent visors and head-tracking capability, so the pilot can perceive the grid while preserving the out-of-the-window gaze [5][6][7][8][9]. This superimposing of symbology on the outside scene elements, to which sensory information is added, is known as conformal symbology [10].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Grid Cell Size in Altitude Control in an Augmented Reality Terrain Display

Rosa

Ernst

Borst

et al. 2020

AIAA Scitech 2020 Forum

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Helicopter pilot performance in degraded visual conditions may be improved through sensor fusion and an augmented reality display. A simulator experiment with 12 participants was done to test the effect of synthetic terrain grid cell size and helicopter heave dynamics on task performance and control behaviour in a terrain-following hill-climb task. An increase in grid cell size lowered task performance and increased control activity due to reduced optical information. Slower heave dynamics decreased task performance and led to a more prospective control strategy. It was concluded that an effective AR terrain display for altitude control can be designed independently from the vehicle dynamics.

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Section: B Optic Flow and Taumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Grid Cell Size in Altitude Control in an Augmented Reality Terrain Display

Rosa

Ernst

Borst

et al. 2020

AIAA Scitech 2020 Forum

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“…This function is considered to be used by not only the pilot-flying, but also by the pilot-monitoring or other crew members. When LOS Marker mode is activated by pressing a switch on the cyclic stick, the point of intersection between the pilot's line of sight and the synthetic terrain surface is calculated and shown on the display [3] . …”

Section: Symbology Of Hmdmentioning

confidence: 99%

“…SPIE 6955, 69550A, 2008, Proc. SPIE 7326, 732607/73260L, 2009 [1]- [3] . In existing Magnetic HMT, it is inevitable to conduct pre-mapping in order to obtain sufficient accuracy because of magnetic field's distortion caused by metallic material around HMT, such as cockpit and helmet.…”

mentioning

confidence: 99%

In-flight evaluation of an Optical Head Motion Tracker II

Tawada

Omura

2010

SPIE Proceedings

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We resented a new approach for Optical HMT (Head Motion Tracker) past years (Proc. SPIE 6955, 69550A, 2008, Proc. SPIE 7326, 732607/73260L, 2009 [1]- [3] . In existing Magnetic HMT, it is inevitable to conduct pre-mapping in order to obtain sufficient accuracy because of magnetic field's distortion caused by metallic material around HMT, such as cockpit and helmet. Optical HMT is commonly known as mapping-free tracker; however, it has some disadvantages on accuracy, stability against sunlight conditions, in terms of comparison with Magnetic HMT. We had succeeded to develop new Optical HMT, which can overcome particular disadvantages by integration with two area cameras, LED markers, image processing techniques and inertial sensors with simple algorithm in laboratory level environment (2007). We have also reported some experimental results conducted in flight test, which proves good accuracy even in the sunlight condition (2008). Shimadzu Corp. and JAXA (Japan Aerospace Exploration Agency) are conducting joint research named SAVERH (Situation Awareness and Visual Enhancer for Rescue Helicopter) [2]-[3] that aims at inventing method of presenting suitable information to the pilot to support search and rescue missions by helicopters. The Optical HMT has been evaluated through a series of flight evaluation in SAVERH and demonstrated the operation concept. Through 16 flights including night flights, the potential capability of the system was demonstrated and issues for further improvement were identified.

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“…In this study, a method to enhance the legibility of the area of interest in such FLIR images was developed. The method was integrated into an E/SVS that has been developed for a project called SAVERH [1,2] , and evaluated by a pilot through flight test. This paper describes the concept and design of the system as well as the results of the flight test.…”

Section: Introductionmentioning

confidence: 99%

Sensor image augmentation to avoid saturation

et al. 2011

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A method to enhance the legibility of FLIR (Forward-Looking Infra Red) images was invented and evaluated by flight test. The method intends to avoid image saturation when a pilot is looking for low temperature objects of interest in an image dominated by high temperature areas, such as searching for objects on a cooler land area in an image mostly filled with a warmer sea area. The method utilizes a 2D mask generated from 3D object of interest data, and overlays the raw image. The effectiveness of the method was evaluated by flight tests in which the processed image was presented on a HMD (Helmet Mounted Display). The flight tests confirmed the enhanced image legibility brought by the method.

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Flight experiment of pilot display for search-and-rescue helicopter

Cited by 6 publications

References 6 publications

Effects of Grid Cell Size in Altitude Control in an Augmented Reality Terrain Display

Effects of Grid Cell Size in Altitude Control in an Augmented Reality Terrain Display

In-flight evaluation of an Optical Head Motion Tracker II

Sensor image augmentation to avoid saturation

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