Identification of tyre characteristics using active force excitation
Paper i proceeding, 2016

Knowledge of the maximum tyre-road friction coefficient can improve active safety systems by defining actuator boundaries and adaptable intervention thresholds. Estimation of the coefficient of friction based on tyre response measurements requires large level of force excitation. Under normal driving conditions, manoeuvres with large tyre utilizations are rare. This study investigates a method where wheel torques with opposite signs are applied to the front and rear axle simultaneously. This procedure allows for an intervention with large tyre excitations without disturbing the motion of the vehicle. The intervention is evaluated in simulations and experiments. Further, a method is proposed which does not require measurement of the vehicle longitudinal velocity. The results show that it is possible to estimate the current friction coefficient with the proposed method, although the assumption made in the proposed method makes the friction estimate sensitive to measurement noise on the wheel speed signal.

State estimation

Vehicle Dynamics

Active excitation

Tyre-road friction estimation


Anton Albinsson

Chalmers, Tillämpad mekanik, Fordonsteknik och autonoma system

Fredrik Bruzelius

Chalmers, Tillämpad mekanik, Fordonsteknik och autonoma system

Bengt J H Jacobson

Chalmers, Tillämpad mekanik, Fordonsteknik och autonoma system

Tony Gustafsson

Qamcom Research & Technology

Mats Jonasson

Volvo Cars

Dynamics of vehicles on roads and tracks. 24th Symposium of the International-Association-for-Vehicle-System-Dynamics (IAVSD) 2015. Graz, Austria, 17-21 August 2015








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