Enhanced Antilock Braking System using Fuzzy Logic Road Detector

Antilock braking system (ABS) stops a vehicle wheel without locking while decreasing the stopping distance. Here we use fuzzy logic to detect the road conditions. Vehicle dynamics and braking systems is complex and proposed controller in different road detected states. They behave strongly non-linear which causes difficulties in developing a classical controller for ABS. Fuzzy logic, however facilitates such system designs and improves turning abilities. The underlying control philosophy takes into consideration-wheel slip, vehicle and wheel velocity as well as the tire and road adhesion coefficient in order to recognize braking tendencies. A fuzzy road detector is designed to detect three different road conditions. Simulations under these road conditions are performed to demonstrate the effectiveness of the proposed controller. Simulation results show good performance of the proposed controller in different road detected states.