Study On The Control Strategy Of Regenerative Braking For Parallel Hybrid Vehicles

Nowadays the automotive industry are facing two major problems,environmental pollution and energy crisis,so use more environment friendly and clean energy became crucial to the vehicle development,electric car also became an inevitable trend of automotive industry in the future.Compared with traditional vehicles and pure electric vehicles,Hybrid electric vehicle combines the pros of the pure electric vehicles,low fuel consumption and low emissions,the traditional vehicles,long endurance mileage and good dynamic performance,moreover,its moderate cost resulting in suitable for the massive production.Overall,Domestic hybrid electric vehicles need focus on improve following aspects,including battery technology,motor torque control,braking force distribution control strategies.This paper choosing parallel hybrid electric vehicle as research object,briefly introduce several types of hybrid electric vehicles.Starting from regenerative braking technology,this paper introduces the basic principle and mathematical model of regenerative braking,analyzes the endured force of electric vehicle and the distribution methods of front and rear shaft braking force,and briefly introduces three different braking force distribution methods.Besides that,this paper described the origin and development of fuzzy control,proposed the braking force distribution control strategy which is based on fuzzy control,and completed the design of algorithms and control strategies.Using simulation software ADVISOR,I established the corresponding Electric vehicles simulation model,and embedded the established control strategy into the ADVISOR.Compare with the simulation results of the basic parameters using the basic control strategy that comes from software,the results using established strategy shown the effectiveness and rationality of the proposed brake force distribution control strategy based on fuzzy control.The fuzzy Logic Control Strategy presented in this paper is simple and practical,Compared to electric assist control strategy,in the premise of ensure the safety brake,the improvement of the fuel economy and the rate of energy recovery in automobiles,already fully proved the control strategy is effective.