Fuzzy based Adaptive Control of Antilock Braking System

Abstract

ABS has been used to maintain the directional stability and maneuverability of road vehicles during emergency braking or when the road is slippery. ABS is an electronic feedback control system which prevent wheel lockup and maintain optimal wheel slip. But the system shows strong nonlinear characteristics which tends the vehicle to over steer and become unstable. This paper proposes introduction of slide mode optimizer which does an online check on the wheel slip to maintain stability. Slide mode optimizer is tuned by the fuzzy controller with a set of defined rules. Simulation results shows improvement of vehicle parameters like brake torque, deceleration, wheel slip, stopping distance.