Aerodynamic Wing Reefing Points for Tractive Line Slack Control
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Solution Overview
Problem
Large-scale aerodynamic wind energy conversion devices face challenges in controlling the aerodynamic wing during starting and landing maneuvers, particularly due to excessive slack in tractive lines which can lead to entanglement, damage, and safety risks.
Innovation Solution
The solution involves strategically arranging reefing points across the aerodynamic wing to manage the lengths and positions of tractive lines, ensuring that the second reefing distance is longer than the first, thereby reducing slack and improving controllability by bringing reefing points closer to a top reference point during starting and landing maneuvers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the size of the aerodynamic wing is increased to produce significant uplift forces, then the energy conversion capability is improved, but the control difficulty during starting and landing maneuvers worsens due to excessive slack in tractive lines
Solution Approach 1:
The reefing points are pre-positioned on the aerodynamic wing at specific locations determined during design. Before starting or landing maneuvers, the system can pre-adjust the reefing lines to optimize tractive line tension, preventing excessive slack formation and enabling smoother control operations.
Solution Approach 2:
The reefing lines act as intermediary elements between the aerodynamic wing and the tractive cable system. By introducing these intermediate control lines with strategically positioned reefing points, the system can independently manage wing shape and tractive line tension, decoupling the control of uplift force generation from tractive line slack management.
2Length of moving object
If the length of tractive lines is increased to accommodate large-scale aerodynamic wings, then the reach and control range are improved, but the risk of entanglement and damage from excessive slack increases
Solution Approach 1:
The reefing points are pre-positioned on the aerodynamic wing at specific locations determined during design. Before starting or landing maneuvers, the system can pre-adjust the reefing lines to optimize tractive line tension, preventing excessive slack formation and enabling smoother control operations.
Solution Approach 2:
The system dynamically changes the effective length of tractive lines by adjusting reefing line tension. During starting and landing maneuvers, the reefing lines are tensioned to take up slack in the tractive lines, effectively reducing their functional length and eliminating entanglement risks without requiring physical shortening of the lines.
3Manufacturing precision
If the aerodynamic wing is positioned close to the base platform during starting and landing, then the operational precision is improved, but the control difficulty increases due to slack in tractive lines
Solution Approach 1:
The reefing lines act as intermediary elements between the aerodynamic wing and the tractive cable system. By introducing these intermediate control lines with strategically positioned reefing points, the system can independently manage wing shape and tractive line tension, decoupling the control of uplift force generation from tractive line slack management.
Solution Approach 2:
The system dynamically changes the effective length of tractive lines by adjusting reefing line tension. During starting and landing maneuvers, the reefing lines are tensioned to take up slack in the tractive lines, effectively reducing their functional length and eliminating entanglement risks without requiring physical shortening of the lines.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This arrangement significantly reduces the risk of entanglement and damage from slack lines, enhancing safety and controllability of the aerodynamic wind energy conversion device by minimizing slack in tractive lines during critical maneuvers.
Implementation Method 1
an aerodynamic wing (100) with an aerodynamic profile... to produce significant uplift forces with the aerodynamic wing which can be transferred via the tractive lines and the tractive cable
Data Source
AI summary
The invention relates to an aerodynamic wind energy conversion device (1) and a method for controlling such a device. The aerodynamic wind energy conversion device (1) comprises an aerodynamic wing (100); at least a first tractive line (310) and a second tractive line (320); wherein ends of the tractive lines (310, 320) are connected to line connection points located at the aerodynamic wing (100); at least a first and a second reefing point (510, 520) located across the aerodynamic wing (100) and is characterized in that the length of the second tractive line (320) is shorter than the length of the first tractive line (310); and wherein the first reefing point (510) is spaced from the first line connection point in a first reefing distance and the second reefing point (520) is spaced from the second line connection point in a second reefing distance, such that the second reefing distance is longer than the first reefing distance.