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Profile: Reducing vehicle development time by fast and accurate tire dynamic behavior testing technologies - 2010-1808 |
Input date: |
Wednesday, June 02, 2010
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Last update: |
Wednesday, June 02, 2010
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Deadline: |
Wednesday, May 25, 2011
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Type of profile: |
TO
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| Title: |
Reducing vehicle development time by fast and accurate tire dynamic behavior testing technologies
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| Abstract: |
A Flemish university has developed a new test methodology for characterizing the dynamic behaviour of tires. Accuracy and efficiency of the approach lead to shorter vehicle development time and a better noise, vibration and durability performance. Reliable prediction of the tire's dynamic behavior is required to assess and optimize vehicle performance. The research group is looking for automotive partners to industrially benchmark the technology in vehicle development and optimization process.
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| Description: |
The developed testing methods provide a tool to experimentally characterize the dynamic behaviour of tires. This characterization can be performed either on a rolling or a non-rolling tire.
Non-rolling tire characterisation is based on experimental modal analysis. The unloaded or loaded tire is excited by a electrodynamic shaker and the response is measured by tri-axial accelerometers. The method allows to identify all resonance modes below 250-300 Hz. A test setup in which the tire is excited by a multi-axial high-frequency hydraulic shaker table can be used to measure the dynamic transfer stiffness of the tire, providing insight in function of frequency, in how vibrations generated in the contact patch are transferred towards the wheel spindle.
To characterise the dynamic behaviour of a rolling tire, the setup consists of two identical tires that are loaded against each. The upper tire is directly mounted on an induction motor. The lower tire, on which all the measurements are performed, is mounted on a multiaxial wheel hub dynamometer. A road surface discontinuity is simulated by guiding an aluminum cleat (or rod) through the contact area of the two tires. Assessing the radial component of the rolling tire treadband vibrations is performed using laser Doppler vibrometry and an operational modal analysis.
The above describe methods have proven their validity on a laboratory setup. However, significant improvements can be made to the hardware, signal post-processing and the tire dynamic parameter estimation method in order to decrease the testing time and the flexibility. These improvements are required to make the testing methods industrially applicable. This will lead to reduced testing times and improved robustness and flexibility of the experimental method.
Therefore, the research group, having a world reputation on noise and vibration engineering research is looking for industrial partners to benchmark the technology on an industrial scale.
Innovative Aspects:
Stricter legislation, increasing complexity and shorter development times require more accurate and efficient simulation tools during the development of vehicles and their components. The tire dynamic behavior has a significant influence on a large number of vehicle performance characteristics, such as, Noise, Vibration and Harshness, comfort, durability, … Therefore, already in the early phases of the vehicle development, a reliable prediction of the tire dynamic behavior is required to assess and optimize vehicle performances. The experimental characterization of the dynamic behavior is crucial in order to obtain a validated, accurate tire model.
The developed testing methods provide a complete tool to characterize the dynamic behavior of tires under diverse operating conditions. The two main innovative aspects are:
- The use of the multi-axial high-frequency hydraulic shaker table to characterize the non-rolling tire dynamic behavior. The applied excitations are much more similar to the operational excitations of a tire rolling over a road surface.
- For the first time, an experimental method has been proposed to determine the complex modes (due to the gyroscopic effects) of a rolling tire.
The tire dynamic behavior shows some important non-linearities. Therefore, the dynamic characterization should be performed with excitation levels which are similar to the operational excitation levels. With the multi-axial high-frequency hydraulic shaker table these excitation levels can be obtained and thus the dynamic characterization of the non-rolling tire is more accurate compared to the classical techniques currently in use.
The dynamic behavior of a rolling tire is significantly different than the behavior of a non-rolling tire. Moreover, this complex dynamic behavior is not yet fully understood. Therefore the proposed testing method for the rolling tire provides a reliable experimental tool to characterize this complex dynamic behavior.
Current Stage of Development
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Development phase - Laboratory tested
RTD programme
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National Programmes
Intellectual Property Rights
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Secret know-how
The university is the owner of the technology.
Organisation/Company Type
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Research institute/University
Organisation/Company Size
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> 500
Application Domain(s)
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Market Applications
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MA Keywords:
Motor vehicles, transportation equipment and parts; Other transportation; Engineering services;
MA Keyword Codes:
009001005; 009001007; 009003001;
MA Highlights:
- Design of Vehicles
- Tire/road noise
- Vehicle handling
- Vehicle ride comfort
- Vehicle NVH (Noise, Vibration and Harshness)
- Vehicle durability
- Design of vehicle components
- Validation of simulation models
Collaboration Type
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Joint further development; Adaptation to specific needs; Engineering;
Collaboration Comments
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- Type of partner sought: industry
- Specific area of activity of the partner: automotive
- Task to be performed by the partner sought: benchmarking technology in industrial environment
Country of origin
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Belgium
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