Research On The Regenerative Braking Control Of Distributed Drive Electric Vehicle

With the rapid development of society, energy shortage and environmental pollution has attracted more attention, the electric car has a huge advantage in energy conservation and environmental protection. It has gradually become a research hotspot in the field of automobile. However, mileage has become the bottleneck of the research process, the regenerative braking system has become the key technology.It is of great significance to the development of electric vehicles.So it is necessary to conduct a detailed study on the regenerative braking system for electric vehicles.This paper analyzes basic principles and design requirements of regenerative braking. Study main influencing factors of regenerative braking. Obtain the limiting condition of regenerative braking torque. At the same time, introduce the basic structure, principle and control method of ABS. Lay the theoretical foundation for integrated control of regenerative braking and ABSSecondly, analyse electric wheel force. Establish the electric wheel dynamics model, tire model, motor model, battery model, integrated control of regenerative braking and ABS model. Analyse braking performance of different braking conditions. There are two conditions including different braking intensity in single road at the same initial braking speed and different initial braking speed of the same target braking strength in the single road. Simulation results show that the integrated control strategy of regenerative braking and ABS can control according to the electric wheel state. Verify the validity of the model and the accuracy of the control strategy.Thirdly, study on regenerative braking of distributed drive electric vehicle based on electric wheel. Through the study on the front and rear wheel braking force distribution and several typical regenerative braking control strategies, control strategy is formulated in this paper. Build the whole vehicle model by Matlab/Simulink. Control the four electric wheels individually and simulate in different conditions. Simulation results show that distributed drive electric vehicle model can accurately identify the road. The vehicle can timely control when it has a tendency to lock and control effect is stable and effective. Maximize to recover the braking energy under the premise of ensuring the braking safety and stability.Finally this paper designes the test bench of regenerative braking. Propose the overall scheme of the system and complete the test bench of the mechanical design, realizating simulation of driving resistance, simulation of automobile inertia and simulation of vertical load, finally design the test-bed control system. Design vehicle controller for preparation of the regenerative braking test.