Hexapod Tire Test Stand for Real Chassis Kinematics
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Solution Overview
Problem
Existing tire test stands are not robust, material-intensive, and do not provide an optimal movement space for simulating real chassis kinematics during tire testing.
Innovation Solution
A tire test stand equipped with a hexapod arrangement of six linear drive elements, allowing precise movement and positioning of tires, featuring a flat rolling surface and distinct configurations for lateral, tangential, and radial force components, enhancing simulation of real-world driving conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional tire test stand structures are used, then the structure is simple, but the movement space for the tire is limited and real chassis kinematics cannot be well simulated
Solution Approach 1:
The hexapod arrangement enables dynamic positioning of the tire holder in six degrees of freedom, allowing the tire to be moved into various positions and orientations during testing. This dynamic capability provides optimal movement space while maintaining a relatively compact overall structure compared to traditional multi-axis positioning systems.
Solution Approach 2:
The hexapod arrangement serves multiple functions simultaneously: it positions the tire holder in three-dimensional space, orients the tire at various angles, and simulates real chassis kinematics. This multi-functionality achieves high adaptability without proportionally increasing structural complexity.
2Strength
If material-intensive structures are used, then the structural strength is high, but the test stand is not robust and consumes excessive materials
Solution Approach 1:
The patent optimizes the geometric parameters of the hexapod arrangement, including the lengths and orientations of the linear drive elements, to achieve the required structural strength with minimal material consumption. The parameters are tuned to provide sufficient rigidity and strength for tire testing while avoiding excessive material use.
Solution Approach 2:
By using a dynamically adjustable hexapod structure with linear drive elements, the test stand achieves high structural strength only where and when needed during testing, rather than requiring uniformly strong structures throughout. This allows material savings in non-critical areas while maintaining strength in load-bearing paths.
3Adaptability or versatility
If the hexapod arrangement is configured for optimal movement space, then the simulation of real chassis kinematics is improved, but the structural complexity increases
Solution Approach 1:
The hexapod arrangement uses asymmetric configuration of the linear drive elements, with different lengths and orientations optimized for simulating specific chassis kinematics. This asymmetric design provides superior simulation accuracy compared to symmetric arrangements while managing structural complexity through purposeful optimization rather than exhaustive configuration.
4Measurement precision
If traditional force measurement arrangements are used, then the structure is simple, but the detection precision of force components is insufficient
Solution Approach 1:
The force measurement system is segmented into three independent measurement directions (lateral, tangential, and radial force components). Each direction is measured by dedicated sensors arranged orthogonally, enabling precise detection of individual force components. This segmentation approach achieves high measurement precision while keeping each measurement subsystem relatively simple.
Data Source
AI summary
A tire test stand includes a frame, a tire holder on which a tire can be mounted, a hexapod arrangement with six linear drive elements, and a rolling surface unit with a rolling surface. In a starting configuration, the linear drive elements are arranged so that at least one of the linear drive elements is arranged such that, when the at least one linear drive element exerts a force on the tire, the greatest force component of this force is oriented in the direction of a lateral force component. At least one linear drive element is arranged such that the greatest force component is oriented in the direction of a tangential force component. At least one linear drive element is arranged such that the greatest force component is oriented in the direction of a radial force component.