Bielastic Tractive Lines for Wind Propulsion Wing Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Large-scale aerodynamic wind propulsion devices face challenges in controlling and steering the aerodynamic wing, particularly during starting and landing maneuvers, due to differences in wind speed at high and low altitudes, and the risk of damage from high forces transferred to the mast during these maneuvers.
Innovation Solution
The use of tractive lines with varying elasticity allows for load-dependent deformation and geometric adjustments of the aerodynamic wing, enabling improved control and stability by changing the angle of attack and reducing uplift forces during different load conditions, without active hauling or veering of lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the aerodynamic wing is made larger to generate significant uplift forces, then the uplift force is improved, but the control and steerability of the wing deteriorates
Solution Approach 1:
The aerodynamic wing is divided into multiple sections (front section, middle section, rear section) that can be independently controlled through separate tractive lines. This segmentation allows for differential control of each section, enabling precise steering and control maneuvers even for large-scale wings, while maintaining the ability to generate significant total uplift force through the combined effect of all sections.
2Ease of operation
If traditional control mechanisms are used to control the wing element, then a certain degree of flight control is achieved, but control in all flight conditions particularly when wind changes significantly deteriorates
Solution Approach 1:
The control system is made dynamic by allowing different sections of the aerodynamic wing to be controlled independently through separate tractive lines. This enables the wing to adapt its geometry and orientation in real-time according to changing wind conditions, providing versatile control capability across all flight conditions rather than a fixed control mechanism.
Solution Approach 2:
The invention changes the geometric parameters of the aerodynamic wing by selectively adjusting the length of individual tractive lines. This allows modification of the wing's angle of attack, section orientation, and overall shape in response to varying wind conditions, enabling adaptation across different flight regimes.
3Ease of operation
If control lines are added to improve wing element control, then control is improved, but the complexity of the control system increases
Solution Approach 1:
The control system is segmented into multiple independent tractive lines, each controlling a specific section of the aerodynamic wing. This segmentation provides precise control capability while keeping each individual control line relatively simple in design and operation, distributing the complexity across multiple simple components rather than one complex system.
4Ease of operation
If telescopic mast is used to improve manoeuvrability during starting and landing, then manoeuvrability is improved, but the risk of damage from high forces during these maneuvers increases
Solution Approach 1:
The aerodynamic wing's geometry is made dynamically adjustable during starting and landing maneuvers by selectively adjusting individual tractive lines. This allows the wing to optimize its angle of attack and section orientation for gentle takeoff and landing, reducing the impact forces and risk of damage while maintaining manoeuvrability, rather than relying solely on mechanical mast systems.
Solution Approach 2:
The invention changes geometric parameters of the aerodynamic wing sections during starting and landing by adjusting tractive line lengths. This enables optimization of the wing's aerodynamic characteristics for low-speed operations, reducing the harmful forces experienced during critical phases of flight while maintaining control and manoeuvrability.
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 solution enhances the steerability and safety of the aerodynamic wind propulsion device during starting and landing, stabilizing the wing at high altitudes and reducing the risk of damage by adapting the wing's geometry and forces in response to changing wind conditions.
Implementation Method 1
an aerodynamic wing (10) being coupled to a steering unit (20) located close below the wing via a plurality of tractive lines (30a-32a), a tractive cable (40) having a first end being connected to the steering unit (20) and a second end being connected to a base platform, the aerodynamic wing (10) having an aerodynamic profile which generates an uplift force in the direction of the tractive cable (40) when the airflow direction is about perpendicular to the tractive cable (40)
Implementation Method 2
The use of tractive lines with varying elasticity allows for load-dependent deformation and geometric adjustments of the aerodynamic wing, enabling improved control and stability by changing the angle of attack and reducing uplift forces during different load conditions
Data Source
Figure 1
Figure 2a~2b
Figure 3a~4
AI summary
The invention relates to an aerodynamic wind propulsion device, particularly for watercrafts, comprising an aerodynamic wing being connected to a steering unit located below the aerodynamic wing via a plurality of tractive lines, a tractive cable, a first end of the tractive cable being connected to the steering unit and a second end of the tractive cable being connected to a base platform, the aerodynamic wing having an aerodynamic profile which generates an uplift force in the direction of the tractive cable when the airflow direction is about perpendicular to the tractive cable. According to the invention, an aerodynamic wing is provided being coupled to a steering unit located close below the wing via a plurality of tractive lines of different elasticity.