The main purpose of the ABS (Anti-lock Baking System) of a personal car is
to keep the greatest adhesion between the tires and the road surface to sho
rten the braking distance and secure the controlling and stability of the v
ehicle, This research is to design an ABS controller, which has the followi
ng functions: slip prediction, detection of road surface state, scanning of
the optimal slip and neuro-fuzzy controller, and to discuss the braking pe
rformance of the ABS under the influences of different road surface states.