Captive Wing Traction System with Sliding Lashing Line
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Solution Overview
Problem
Existing captive wing traction systems face challenges in efficiently deploying and folding traction wings, particularly in complex environments like severe weather conditions, and require cumbersome line management and complex interfaces.
Innovation Solution
The proposed captive wing traction system incorporates a trajectory control steering wheel device with fixed and mobile suspension lines, a traction line connecting to a basic platform, a guide line linking the wing's attack edge to the steering wheel, and a stowage line that slides along the guide line to occupy stable positions, enabling fully automatic deployment and withdrawal without manual line manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If manual line manipulation is used for deploying and folding the traction wing, then the system can be operated with simple mechanical components, but the operation becomes tedious and difficult to automate
Solution Approach 1:
The lashing means are designed to automatically engage and disengage without manual intervention. The sliding connection between the lashing line and guide line allows the system to self-lash and self-unlash during deployment and retraction cycles, eliminating the need for operators to manually handle lines
Solution Approach 2:
The guide line acts as an intermediary element that mediates between the lashing line and the traction wing. By sliding along the guide line, the lashing line can transfer forces and movements without requiring direct manual manipulation, enabling automated operation
2Reliability
If complex interfaces are designed to conform to the shape of the traction wing for lashing, then secure holding is achieved, but the lashing mast design becomes more complex and expensive
Solution Approach 1:
The complex shaped interface is extracted from the lashing mast design and transferred to the lashing means themselves. The lashing line and guide line configuration provides the necessary geometric adaptation to match the wing's leading edge shape, while the mast retains a simple cylindrical form
Solution Approach 2:
Instead of making the mast complex to fit the wing shape, the solution inverts the approach by using flexible lines that can adapt to the wing shape while the mast remains simple. The lashing means conform to the wing geometry rather than the mast conforming to the wing
3Adaptability or versatility
If the lashing line is permanently attached to the guide line, then the structure is simpler, but the system cannot adapt to different deployment positions
Solution Approach 1:
The connection between the lashing line and guide line is made dynamic through a sliding mechanism rather than a fixed attachment. This allows the lashing line to move along the guide line and adapt to different positions during deployment and retraction while maintaining a relatively simple connection structure
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Captive-sail hauling system (1) comprising: - a flying trajectory-control device (7) attached to a hauling sail (5) by fixed shrouds (6) and mobile shrouds (6), the flying trajectory-control device (7) being able to control the mobile shrouds (6); - a hauling line (8) connecting the flying trajectory-control device (7) to the base platform (3); - a guide line (9) connecting the leading edge (16) of the hauling sail (5) to the flying trajectory-control device (7); - a mooring line (10) of which one of the ends is connected to the base platform (3) and the other of the ends of which is slidingly coupled to the guide line (9); - an angle-change transmission element (13) attached to the mooring mast (4).