Airborne Winch Payload Line Control for Precise Positioning
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Solution Overview
Problem
Current airborne payload control systems lack the precision and control to maintain the position and altitude of a payload line during flight, limiting their ability to retrieve or release payloads effectively and inconspicuously.
Innovation Solution
An integrated systems approach that includes a winch system, payload line, line sensor, and controllers to stabilize and control the payload line's position and altitude, allowing for precise control of the payload's position and altitude, enabling controlled retrieval or release and inconspicuous data retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a moving aircraft uses a simple payload release mechanism, then the device complexity is reduced, but the manufacturing precision and control precision of payload position are worsened
Solution Approach 1:
The payload control system is segmented into multiple independent components: a winch system for line deployment and retrieval, a line sensor for detecting payload line status, and a controller for coordinating their operation. This segmentation allows each component to be optimized independently while maintaining overall system precision without excessive complexity.
Solution Approach 2:
The line sensor provides real-time feedback about the payload line's position and status to the controller. This feedback loop enables the controller to adjust winch operations dynamically, maintaining precise payload position control while using a relatively simple mechanical winch mechanism rather than a complex active control system.
2Object-affected harmful factors
If the aircraft flies at higher altitude for undetectability, then the object-generated harmful factors (detection) are reduced, but the control precision of payload position is worsened due to atmospheric conditions
Solution Approach 1:
The line sensor continuously monitors the payload line's position and provides feedback to the controller, enabling real-time corrections for atmospheric disturbances. This feedback mechanism compensates for the degraded control conditions at higher altitudes, maintaining precision despite increased distance and atmospheric interference.
Solution Approach 2:
The system replaces direct mechanical control of the payload with a cable-driven winch system that can be precisely controlled from the aircraft. This mechanical substitution allows for fine-grained control of payload position through the winch's line deployment and retrieval, enabling precise positioning even when the aircraft is at high altitudes beyond visual detection range.
3Productivity
If the payload is released quickly for efficient retrieval, then the productivity is improved, but the object-generated harmful factors (damage to fragile objects) are worsened
Solution Approach 1:
The winch system provides dynamic control over payload retrieval speed, allowing the operator to adjust the retrieval rate based on payload characteristics. Fragile payloads can be retrieved slowly to prevent damage, while robust payloads can be retrieved quickly to maximize productivity. This dynamic adjustability resolves the contradiction between speed and safety.
Solution Approach 2:
The system changes the operational parameters of the winch motor, such as speed and torque, based on the retrieved object's properties. By adjusting these parameters, the system can optimize retrieval speed for each specific payload, preventing damage to fragile objects while maintaining high productivity for durable payloads.
Data Source
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Figure 2
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AI summary
A method (400) for an airborne payload system (100) includes receiving (410), from a sensor (140) on a payload line (130), information about the payload line (130), wherein the payload line (130) comprises a first end (130a) wound about a main reel (210) of a winch system (120) and a second end (130b) configured to couple to a payload (160). The method further includes providing instructions (420), based on the received information, to the unmanned aircraft (110) and the winch system (120) in order to control a position of the second end (130b) of the payload line (130).