Modelling and Simulation of Braking System in Automobile

In recent years vehicles are fitted with antilock brake systems to enhance braking system in automobiles and prevent wheel lock during braking. To achieve this controller are needed controlled torque that will maintain the optimum wheel slip ratio and coefficient of friction, which is the vehicle speed in relation to wheel rotation. A model of a quarter vehicle was developed and differential equation of motion was formulated and was applied to linear and angular velocity. Control strategies of Proportional Feedback Control, Proportional Integral Feedback Control, Proportional Integral Derivative Feedback Control, were applied to determine the effectiveness of maintaining desired slip ratio and coefficient of friction. Mathlab/Simulink software were used to simulate the response of the different braking strategies. Results shows that by maintaining the slip ratio and coefficient of friction values, the braking time was reduce 3.6 seconds to 2.3 seconds for a distance of 45m.