Abstract
The dynamic tyre behaviour is studied by means of experiments and a dynamic tyre model. To represent the tyre dynamics up to approximately 60 Hz a rigid ring model is used. The tyre-road interface is modelled using a steady state tyre model in conjunction with the relaxation length concept to describe the longitudinal and lateral force and the aligning moment generation properties of the tyre. Residual compliances are introduced to account for the large carcass deformations near the tyre contact patch. The measured frequency response functions of forces and moments with respect to the applied steering angle or brake torque are used to estimate the tyre parameters. From the experiments the total tyre relaxation length is determined as function of the level of slip and the normal load. The influence of the velocity on the natural frequencies of the belt is shown as well.
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