Wind Tunnel Balance Floating Platform Force Decoupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wind tunnel balances face challenges in accurately measuring aerodynamic forces due to parasitic forces caused by slippage, imprecise vehicle fixation, and weight distribution, leading to measurement inaccuracies and reduced precision.
Innovation Solution
A wind tunnel balance design that supports the platform to move relative to the frame, allowing for frictionless transmission of forces in the x and y directions while decoupling z forces, enabling separate detection of parasitic forces and reducing the weight-bearing stress on the platform with the use of force measuring elements and a floating mount system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the platform supports the entire weight of the belt unit and vehicle, then structural stability is ensured, but measurement precision deteriorates due to high weight forces on the weighing plate
Solution Approach 1:
The support structure is segmented into multiple independent support points (at least two support points) distributed across the platform. This distributes the weight force rather than concentrating it on a single weighing plate, maintaining structural stability while reducing the load on any single measurement point, thereby improving measurement precision.
2Device complexity
If conventional through-the-belt measurement is used, then force detection is simplified, but measurement precision deteriorates due to parasitic forces from wheel slippage and imprecise fixation
Solution Approach 1:
The harmful parasitic forces (wheel slippage effects, imprecise fixation forces) are extracted and isolated from the main measurement path. By using multiple support points and a distributed measurement system, these parasitic forces are separated from the aerodynamic force measurements, allowing them to be identified and compensated without compromising the simplicity of the through-the-belt measurement approach.
Solution Approach 2:
The system uses feedback from multiple support points to detect and compensate for parasitic forces. By monitoring forces at multiple locations, the system can identify deviations caused by wheel slippage or fixation issues and apply corrections to maintain measurement precision.
3Device complexity
If a single weighing plate is used to detect all forces, then device complexity is reduced, but measurement precision deteriorates due to inability to separately detect parasitic forces
Solution Approach 1:
Instead of a single weighing plate, the system segments the measurement function across multiple support points. Each support point can independently measure forces, allowing the system to distinguish between aerodynamic forces and parasitic forces based on their spatial distribution patterns, thereby improving measurement precision without significantly increasing device complexity.
Data Source
AI summary
The invention relates to a wind tunnel balance, having at least one belt unit that has at least one belt unit frame equipped with at least one conveyor belt that is wound around at least two rollers. The wind tunnel balance also has at least one fastening device that is suitable for fastening a vehicle to the conveyor belt in a predetermined position, a frame, and a platform that is supported so that it is able to move relative to the frame; force measuring elements are provided between the platform and the frame and are able to detect forces between the frame and platform, and the fastening device is attached to the platform in stationary fashion. The invention permits a high-precision detection of aerodynamic forces in wind tunnel measurements or tests.