Designing A Novel (Type-1 & Type-2) Fuzzy Controller for Anti-lock Brake System(ABS)

My B.S. specialized project was on Designing A Novel (Type-1 & Type-2) Fuzzy Controller for Anti-lock Brake System(ABS), comparing results together and with PID Controller, ( Department of mechanical engineering, Tabriz University).

Abstract

Along with the progresses in automotive industry, improvements in performance of automobiles safety systems have been fulfilled through application of new control systems. One of the most important safety systems is Anti-lock Brake System (ABS) which has had a great advancement in past few years. Due to existing nonlinear factors, a nonlinear robust control system for ABS is essential.

To achieve this goal in this project, wheel slip is computed and difference between wheel slip and its desired value, which is different for various road conditions, will be calculated. By defining several membership functions for differences, fuzzy control rules will be fired for different velocities which have various membership functions in both fuzzy type-1 and type-2 method. These rules maintain the wheel slip in an acceptable range of the desire slip value by increasing and decreasing the brake pressure. Conducted analyses and results of simulations indicated good performance of the designed controller in the presence of uncertainties. At the end the results of fuzzy controllers are compared together and with PID controller. As a result, better performance of type-2 fuzzy controller is validated.