Dual-Motor Winch System for Airborne Payload Position Control
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Solution Overview
Problem
Current airborne payload control systems lack the capability to precisely control the position and altitude of a payload during flight, limiting their ability to retrieve or release payloads effectively and maintain inconspicuous data retrieval operations.
Innovation Solution
An integrated winch system with a payload line, line sensor, and controller that allows for real-time control of the payload line's position and altitude, enabling precise control over the payload's position and altitude through coordinated operation of motors and avionics systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single motor is used to spool the payload line, then the device complexity is reduced, but the manufacturing precision and control accuracy of payload position deteriorate
Solution Approach 1:
The winch system is divided into two independent motor units: a first motor coupled to a main reel for spooling the payload line, and a second motor coupled to a counter reel for winding the payload line. This segmentation allows each motor to independently control specific aspects of payload line management, thereby improving position control precision without significantly increasing overall system complexity.
Solution Approach 2:
The system dynamically coordinates the operation of two motors based on real-time payload position requirements. The controller adjusts the spooling and winding operations dynamically to maintain precise control over payload position and altitude, adapting to changing mission requirements during flight.
2Productivity
If real-time control of payload line position and altitude is implemented, then the productivity and mission effectiveness are improved, but the device complexity and energy consumption increase
Solution Approach 1:
The controller integrates multiple functions into a single unit: it coordinates the first and second motors for payload line spooling and winding, manages the line sensor for position detection, and controls the avionics system for overall mission management. This multi-functionality improves productivity by enabling real-time payload control while minimizing the increase in device complexity through functional integration.
Solution Approach 2:
The system incorporates a line sensor that provides real-time feedback on payload line position and altitude to the controller. This feedback loop enables the controller to adjust motor operations dynamically, ensuring precise payload control for retrieval and release operations while maintaining efficient energy usage through responsive, demand-driven control.
3Reliability
If precise control of payload position is achieved through coordinated motor operation, then the reliability of payload retrieval is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The winch system is segmented into modular components: a main reel assembly with the first motor, a counter reel assembly with the second motor, a line sensor unit, and a controller. Each module can be manufactured and tested independently, then assembled together. This segmentation improves reliability through independent verification of each component while facilitating easier manufacturing and assembly compared to a fully integrated design.
Data Source
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Figure 2
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AI summary
A method for a winch system (120) includes receiving, from a controller (150), instructions to spool a payload line (130), the payload line (130) comprising a first end and a second end, the first end (130a) coupled to a main reel (210) of the winch system (120) and the second end (130b) configured to couple to a payload (160). The method further includes operating, based on the instructions, one or more of a first motor (270) of the winch system (120) and a second motor (310) of the winch system, wherein the one or more of the first motor (270) and the second motor (310) are operated in order to control a position of the second end of the payload line (130b).