With the emergence of electromobility, demands on driving comfort are changing. Replacing the internal combustion engine with an electric drive train eliminates one of the main sources of vehicle noise and vibration, increasing the influence of those caused by road unevenness. As the only components making contact with the road, tyres filter out or amplify road excitations according to their frequency response. Due to their complex design and multi-material structure, a complete and accurate description of these frequency response characteristics is difficult to achieve. Multibody simulations used in the early phases of a vehicle development process to determine chassis and full vehicle frequency response utilize specialized physical tyre models for this purpose. The most widely used parametric models determine the correct frequency response based on vibration measurements (e.g. cleat tests). State-of-the-art approaches for the evaluation of such measurements are based on the Fourier transform and Power spectral density, which limit the insight into the frequency domain to only the frequency con-tent and its magnitudes. The aim of this paper is to provide a deeper insight into the frequency domain of the tyre vibration by implementing the concept of wavelet analysis. By analyzing real measurement data of tyre cleat tests, some vibration phenomena and the advantages of the proposed methodology will be discussed.
Extended Evaluation of Tyre Comfort using Wavelet Analysis
Proceedings
2021-06-15
14 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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