Modeling and simulation of the regenerative braking system in a HEV based on fuzzy control

Based on fuzzy control theory, the regenerative braking control strategy for a hybrid electric vehicle is established. The braking force distribution rules suitable for energy recovery and the fuzzy controller are designed with brake pedal position, vehicle speed and battery SOC taken as the inputs of fuzzy controller. The models for electric motor, battery and wheel dynamics are built and a simulation of regenerative braking with different initial speeds is performed. The results indicate that the braking force distribution strategy based on fuzzy control doesn't require accurate mathematical model and has good robustness and application value.