Control Methods of Anti-lock Braking System (ABS)

There are various control methods for anti-lock braking system (ABS), such as PID control method, optimal control method, sliding mode variable structure control method, fuzzy control method, and robust control method.

Four of these control methods have been studied in the literature, and comparisons have revealed that a single control system is difficult to balance robustness and control accuracy, and also varies in difficulty from an implementation point of view. Fuzzy control is implementable and robust, but the control accuracy is slightly worse. The sliding mode variable structure is similar to the fuzzy control, the accuracy has been improved, but at the expense of high-speed switching of the system, the requirements of the actuator system is higher.PID is simple and practical, the accuracy is better, but the robustness is worse, and the cost of implementation is also higher. Traditional logic threshold control requires more experience to figure out, algorithm implementation is complex, but the hardware cost is low.

So the appropriate combination of different control methods should be able to get a better control effect, such as fuzzy + PID, combined with the robustness of fuzzy and PID control accuracy.