Research On Control Strategy Of Regenerative Braking For FSEC Electric Formula Racing

As environmental and energy issues have become more and more important,in recent years,purely electric vehicles have become a global research hotspot.The cruising performance of electric vehicles has always been one of the urgent problems to be solved.As the key energy-saving method,regenerative braking technology can improve the cruising range,the basic idea of that is to reduce the heat loss generated during braking and recycle it for reuse.In the Chinese University Students' Electric Formula Competition(FSEC),the racing car can use regenerative braking technology to reduce energy consumption and improve energy utilization in efficiency testing.Therefore,regenerative braking technology has important application value in the field of electric vehicles.FSEC electric formula racing regenerative braking control strategy for the study in this paper,which mainly includes the following:Firstly,the basic principle and structure of regenerative braking is introduced.The mathematical model of permanent magnet synchronous motor is introduced.The working principle of permanent magnet synchronous motor is analyzed,which provides a theoretical support for the regenerative braking control strategy.Secondly,the racing track model is established and the track condition is analyzed,and the braking mechanic of the FSEC electric car of Chang' an University is analyzed.The influencing factors of regenerative braking are analyzed in depth,and the thresholds of influencing factors as determining conditions in the control strategy are determined.Based on this,a regenerative braking control strategy based on braking force distribution in rear axle parallel mode is proposed.The Simulink model of control strategy is established and the correctness of that is verified by simulation is verified.Then,the vehicle model in AVL Cruise software is established,which provides an execution component for the control strategy model.Aiming at the error problems of the actual motor output torque and the ideal output torque,the fuzzy PID controller module is established in Matlab/Simulink to reduce system response error and improve the accuracy of braking force distribution,thus ensuring vehicle braking safety.Finally,the Simulink model of the regenerative braking control strategy is interfaced withthe vehicle model in the Cruise environment and the simulation task of the actual track conditions is designed to achieve the co-simulation.The performance of the regenerative braking control strategy in the vehicle model is verified through the analysis of the simulation results.The regenerative braking control strategy proposed in this paper has certain reference value in the design of electric formula racing car.