Deployable Navigation Beacons for UAV Sensor Failure Recovery
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Solution Overview
Problem
Unmanned aerial vehicles (UAVs) face challenges in maintaining accurate position and orientation tracking, especially in low-light conditions or when sensors fail, leading to potential loss of control during flight and delivery operations.
Innovation Solution
Deployment of deployable navigation beacons from the UAV, which emit visual, auditory, or radio signals, allowing the UAV to use Simultaneous Localization and Mapping (SLAM) algorithms to determine their locations and maintain control, even in the absence of reliable sensor data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UAV relies on primary sensor systems for position and orientation tracking, then navigation accuracy is maintained under normal conditions, but the system becomes vulnerable to failures in low-light conditions, sensor malfunctions, or occlusions
Solution Approach 1:
The UAV deploys navigation beacons proactively before sensor failure occurs. The beacons are released during flight to establish a known reference framework in advance, ensuring navigation capability is maintained even if primary sensors fail later. This preliminary deployment of backup navigation aids resolves the contradiction by preparing redundancy before the crisis occurs.
Solution Approach 2:
The navigation beacons serve as an intermediary reference system between the UAV and the environment. Instead of relying directly on potentially failing onboard sensors to perceive the environment, the UAV uses the deployed beacons as intermediate reference points for localization. This mediator approach maintains navigation reliability while reducing dependence on complex primary sensor systems.
2Reliability
If the UAV deploys navigation beacons as a backup system, then navigation reliability is improved during sensor failure, but the overall system complexity and weight increase
Solution Approach 1:
The navigation beacons are designed as disposable, lightweight components that are deployed only when needed for backup navigation. Each beacon is a simple device with minimal mass, and the entire beacon system represents a small fraction of UAV weight. The beacons serve their purpose as temporary emergency aids rather than permanent heavy infrastructure, resolving the weight-reliability contradiction.
Solution Approach 2:
The backup navigation system is segmented into multiple individual beacon units rather than a single heavy system. Each beacon is an independent, lightweight element that can be deployed separately. This segmentation allows the UAV to carry multiple small beacons instead of one large heavy backup system, distributing the weight burden while maintaining reliability.
3Measurement precision
If the UAV uses camera-based visual navigation, then position tracking is accurate in good lighting conditions, but the system fails in low-light situations, nighttime operations, or when smoke occlusions are present
Solution Approach 1:
The navigation beacons emit distinct visual signals with specific color characteristics that are detectable across varying lighting conditions. The beacons use active illumination with identifiable color signatures that remain distinguishable in low-light, nighttime, or obscured environments. This color-based signaling approach allows the UAV to maintain position tracking precision regardless of ambient lighting conditions, resolving the adaptability-precision contradiction.
Data Source
AI summary
Deployable navigation beacons can be deployed from a vehicle, such as an unmanned aerial vehicle (UAV), in an event of a loss of position or orientation of the vehicle. After deployment of the navigation beacons, the vehicle may detect locations of the navigation beacon, which may define a surface that may include surface features. The vehicle may then perform control operations based on the resolved locations. For example, UAV may maneuver to land proximate to the navigation beacons after resolving locations of the navigation beacons as a continuous surface. The navigation beacons may output a visual signal (e.g., a light), a auditory signal (e.g., a sound), and/or a radio signal. In some embodiments, each navigation beacon may include a different or unique signal.