Combined Modality Hover Drift Cueing for Pilot Awareness
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Solution Overview
Problem
Pilots face spatial disorientation in degraded visual environments (DVE) during hover and landing operations due to lack of peripheral vision cues and tactile feedback, leading to increased risk of incidents.
Innovation Solution
A combined modality hover drift cueing system that uses both peripheral vision and tactile feedback indicators to provide drift information, with a mode selector allowing for different cueing modes, incorporating sensors like radar altimeters and inertial navigation systems to determine and display fore/aft and lateral drift, and utilizing LEDs and haptic feedback to indicate drift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional instrument flight displays present critical hover drift information in the central visual field (fovea centralis), then the information is clearly visible, but mental processing bandwidth is constrained due to the small visual area required
Solution Approach 1:
The patent moves the display of critical hover drift information from the central visual field (2D foveal vision) to the peripheral visual field, utilizing the third dimension of visual space. This dimensional transition allows pilots to access drift information without concentrating central visual attention, thereby reducing mental processing bandwidth constraints while maintaining information visibility.
Solution Approach 2:
The patent segments visual information presentation by separating critical hover drift cues from other flight information. Peripheral vision indicators provide drift information in one segment of the visual field, while central vision remains available for other tasks. This segmentation allows parallel processing of multiple flight parameters without overloading central visual processing resources.
2Reliability
If tactile feedback is added to provide additional information channels, then pilot awareness is enhanced, but device complexity increases
Solution Approach 1:
The patent merges visual and tactile feedback modalities into a unified hover drift cueing system. Visual indicators in the peripheral field provide directional drift information, while tactile feedback through the control stick provides force cues corresponding to drift magnitude and direction. This combination of multiple sensing modalities enhances pilot awareness in degraded visual environments while managing system complexity through integrated design.
Solution Approach 2:
The patent implements closed-loop feedback by providing real-time tactile forces on the control stick that correspond to actual hover drift conditions. The feedback force magnitude and direction are dynamically adjusted based on sensor measurements of aircraft position and drift rate, creating an intuitive force-feedback interface that enhances situational awareness without requiring complex manual interpretation.
3Measurement precision
If multiple sensors and indicators are integrated to provide comprehensive drift information, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent employs multi-functional sensors that serve multiple purposes within the hover drift cueing system. The inertial measurement unit (IMU) provides data for both attitude control and drift detection, while the flight control system processes information for both primary flight control and peripheral vision indicator actuation. This multi-functionality reduces the total number of dedicated components, managing system complexity while maintaining high measurement precision through integrated sensor fusion.
Data Source
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AI summary
Combined modality hover drift cueing methods, systems and computer readable media are disclosed. For example, some implementations can include a system comprising one or more sensors, and a combined modality hover drift cueing controller coupled to the one or more sensors and configured to determine hover drift and to control a plurality of indicators in response to determined hover drift. The system can also include a mode selector coupled to the combined modality hover drift cueing controller and configured to provide an indication of mode selection between one of a first mode, a second mode and a third mode, wherein the first mode is a combined modality mode. The system can further include a peripheral vision hover drift indicator coupled to the controller and mounted on an inside surface of an aircraft cockpit, and a tactile feedback indicator coupled to the controller.