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Identification of tyre characteristics using active force excitation

Anton Albinsson (Institutionen för tillämpad mekanik, Fordonsteknik och autonoma system) ; Fredrik Bruzelius (Institutionen för tillämpad mekanik, Fordonsteknik och autonoma system) ; Tony Gustafsson ; Mats Jonasson ; Bengt Jacobson (Institutionen för tillämpad mekanik, Fordonsteknik och autonoma system)
24th Symposium of the International Association for Vehicle System Dynamics, IAVSD 2015; Graz; Austria; 17 August 2015 through 21 August 2015 p. 501-510. (2015)
[Konferensbidrag, refereegranskat]

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.

Nyckelord: Vehicle Dynamics, Tyre-road friction estimation, State estimation, Active excitation



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Denna post skapades 2015-08-24. Senast ändrad 2016-07-12.
CPL Pubid: 221088

 

Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Fordonsteknik och autonoma system

Ämnesområden

Transport
Farkostteknik

Chalmers infrastruktur

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