UAV Reel Control for Wind-Stable Suspended Payload Delivery
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Solution Overview
Problem
An article suspended by a wire from an unmanned aerial vehicle (UAV) is agitated by wind, making it difficult to place the article in a designated position during delivery.
Innovation Solution
A control device and method that reduce the effect of wind on the article by controlling the feeding of a linear member from the UAV, using sensors and actuators to adjust the feeding amount and position of the article based on wind conditions, ensuring it is dropped within a target range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual control is used during automatic return-to-start, then the operator can intervene to avoid collisions, but the operation becomes complex and time-consuming
Solution Approach 1:
The patent introduces an automatic control system as an intermediary between the operator and the drone. The automatic return-to-start function with one-key emergency stop capability acts as a mediator that handles collision avoidance automatically, eliminating the need for manual intervention while maintaining safety. This resolves the contradiction by providing automatic protection without requiring complex manual operations.
Solution Approach 2:
The drone is equipped with automatic return-to-start functionality that enables it to autonomously navigate back to the starting point and perform emergency stops when collisions are detected. This self-service capability allows the drone to handle its own safety without external intervention, simplifying the control operation while maintaining reliability.
2Ease of operation
If automatic return-to-start is implemented, then collision avoidance is automated, but the system complexity increases
Solution Approach 1:
The patent merges multiple functions into a single integrated automatic return-to-start system. The one-key emergency stop, automatic navigation, and collision detection capabilities are combined into one unified control mechanism. This consolidation simplifies the user interface and operation while the underlying system handles the complexity internally, resolving the contradiction between ease of operation and system complexity.
3Volume of moving object
If the drone structure is made compact, then it can fit in a hand, but the battery capacity is reduced
Solution Approach 1:
The patent employs parameter optimization in the battery selection process, choosing a 14.8V 4000mAh battery that provides sufficient operation time while maintaining a compact form factor. The system also optimizes power consumption parameters through efficient motor selection and control algorithms, enabling the drone to achieve 8-10 minutes of flight time despite its small size. This resolves the contradiction by optimizing multiple parameters simultaneously rather than prioritizing only size or battery capacity.
Data Source
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AI summary
An unmanned aerial vehicle includes: a mooring member capable of mooring an article; a linear member connected to the mooring member; a reel around which the linear member is wound. The unmanned aerial vehicle acquires information relating to wind strength around the article when the article is to be lowered from the unmanned aerial vehicle by controlling the reel; and controls the reel so as to provide a feeding amount of the linear member in dependence on the wind strength, on the basis of the acquired information.