Simulation-based method to adapt MF-Tire model parameters to real road conditions

Abstract

The tyre as link between road and vehicle is one of the key elements in the field of vehicle dynamics concerning safety, driving performance and driving comfort [1]. To simulate the transmitted forces and torques in the contact patch of the tyre, vehicle dynamic models are coupled with handling tyre models. The data to parameterise tyre models is mainly identified by tests at the tyre test rig. These tests are accurate and reproducible measurements, as generally known, but correspond only rarely to real tyreroad contacts [2]. It must be clear to the user of tyre models that these measurement data are subject to systemic significant scatter. Studies have shown that measurements of the cornering stiffness on various tyre test rigs can differ up to 20%. Significant factors for these differences are the coefficient of friction, the geometry of the treadmill or drum or the high tread wear and thermal load [3]. Therefore an adaptation of the tyre parameters is necessary (e.g. cornering stiffness, maximum grip …) such that the vehicle dynamic simulation correlates to the real driving behaviour.