In this paper, a design methodology of an ABS controller for four wheeled road vehicles is presented with a detailed simulation work. In the study, it is intended to follow a flexible approach for integration within unified control structure of an integrated active safety system. A hierarchical control structure was adopted for the controller and the applied strategy was formulized as reference slip tracking. The two low-level controller alternatives (fuzzy logic and PID) successfully tracked the reference slip values determined through vehicle longitudinal acceleration based surface condition estimation for different road conditions. In simulations, for straight-line braking case, a considerable improvement in stopping distances was achieved. In combined braking and steering case, the stability was maintained; on the other hand, an understeer vehicle response was observed due to limited lateral force generation capability as expected. By benefiting from the sensory hardware of the integrated active safety system, a more precise calculation of the wheel slip was attained, which provided the low-level controllers a successful tracking ability of the reference slip signal. Performance of the ABS controlled vehicle was also simulated for noisy vehicle acceleration and angular wheel speed data.
Design and simulation of an ABS for an integrated active safety system for road vehicles
International Journal of Vehicle Design ; 52 , 1-4 ; 64-81
2010
18 Seiten, 12 Bilder, 1 Tabelle, 21 Quellen
Aufsatz (Zeitschrift)
Englisch
Design and simulation of an ABS for an integrated active safety system for road vehicles
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