Design and Simulation of Fuzzy-Sliding Mode Anti-lock Braking System Capable of Identification of Different Surfaces of Road

Anti-Lock Braking System has been designed to improve the effects of the braking process and retain the ability of steering vehicle. But ABS could not be effective in inadequate condition of the road. Coefficient of friction between tires and road is a non-linear function and a ratio of the slip, thus it is different for different surface of the road. In this study, the longitudinal friction coefficient between tires and the road is considered near the maximum value. Stimulations have been conducted in 1/4 car model by MATLAB. The results demonstrated that ABS with identifying system of road surface compared with previous generation of ABS system has better performance and recommended controller could maintain the slip in optimal value so that the vehicle could stop without slipping.