Research On Regenerative Anti-lock Breaking System For Electric Vehicle

The development of new energy vehicles is extremely urgent because of shortenedpetroleum resources. Functioned as green transport facilities, electronic vehicles arealways concerned by automobile engineers. Even though electric vehicles have beenupdated rapidly since the21st century, they still have some driving range limitations.Therefore, several significant research objectives have been raised such as how toimprove the capacity of the battery, build efficient control system, and take fulladvantage of the electric vehicle.In this thesis, the research objective is to connect the exclusive electric vehicleenergy regenerative breaking system with the traditional braking system by analyzingtheir actual operating conditions and regenerative characteristics. In order to enhanceelectric vehicle’s’ driving ranges, this article is aimed to find out the way to recover thebreaking energy safely and effectively.The paralleled hydraulic braking system and energy regenerative system areadopted in this research. In order to maintain the sliding rate within a reasonable range,the vehicle sliding rates are calculated and the distribution of breaking force iscontrolled by the controller. Consequently, the reconvening energy of high-safetyvehicles will be examined, and their sliding rates will be kept in an ideal range.By analyzing the single wheel braking process, this article builds both the energyregenerative braking system model and the hydraulic braking system model. Thesemodels are then analyzed by Matlab/Simulink. Finally, the results from no ABS system,traditional ABS system and energy regenerative system are compared by adoptingdifferent braking control strategies. From the conclusion, the car without ABS systemhas longer breaking distance and worse breaking stability than the car with ABS. TheABS system using PID control strategy has more quickly response speed and betterstability than using logic threshold control strategy. But the logic threshold controlstrategy shows less overshoot than PID control strategy. Fuzzy control strategy has littleovershoot, quickly response speed and stability in different road conditions. All of thecontrol strategies shows safety and recover breaking energy in the breaking process.