Simulation Study on Control Method of Anti-lock Braking System under Steering Condition

Based on the analysis of the structure and the dynamics of the vehicle braking system, the model of a four-wheel vehicle under steering condition was established.Simulation was first carried out without ABS controller, and the result shows that the wheels lock, which leads to danger steering.Then a Mamdani fuzzy controller with longitudinal slip ratio and its derivative and lateral slip ratio as the inputs and braking pressure change as output was designed.Braking time, braking distance and lateral slip were studied based on simulation, and the result shows that the ABS is effective in reducing not only the braking distance and braking time but also the lateral sliding, so that the braking safety is ensured.The simulation shows that the fuzzy logic control strategy is effective in improving the braking performances.