Simulation Of Distributed Drive Pure Electric Vehicle Based On Cruise/Simulink

In the face of the increasing depletion of non-renewable resources and air pollution caused by traditional internal combustion engine vehicles,vigorous development of electric vehicles is one of the important measures to solve these problems.Due to the advancement of the " VCU,BMS and MCU " engineering technology,the progress of the popularization of electric vehicles has been accelerated.Distributed drive pure electric vehicles generally use a smaller power motor as the drive motor and also eliminate the use of the gearbox.This is beneficial to reduce motor development requirements and cost savings,and has advantages in terms of power and economy.Therefore,distributed drive pure electric vehicles is an important research direction of electric vehicles.Based on the electric vehicle structure,a utomobile theory and modern control theory,this paper builds a distributed drive pure electric vehicle simulation model based on Cruise,and combines with Simulink to build a drive control strategy for joint simulation.The results show that the distributed drive pure electric vehicle has better power and economy than the non-distributed drive pure electric vehicle test results.Firstly,the powertrain structure of distributed drive pure electric vehicles is introduced,and the influence of automobile powertrain on vehicle dynamics and economy is analyzed.According to the theory of distributed drive pure electric vehicle,the dynamic parameters of front and rear axle drive motors and battery packs are optimized and matched,and the performance requirements of the distributed drive pure electric vehicles are determined according to relevant national regulations.Then,based on AVL Cruise,the vehicle model is built.According to the control principle and structure of the distributed drive pure electric vehicle,the driver's behavior intention is analyzed and the working condition mode is determined.In view of the starting mode of the vehicle,this paper introduces the PI algorithm control to reduce the impact of the motor torque,so that the driving torque can be reasonably transitioned to the normal driving condition.When the vehicle is in the normal working mode,the fuzzy control algorithm is introduced in this paper,and the vehicle speed and the accelerator pedal change rate are fuzzyly controlled to compensate the torque,thus obtaining the current target torque of the front and rear axle drive motors.The starting ratio of the vehicle and the torque distribution ratio of the front and rear axle drive motors of the normal driving mode are determined.The energy brake recovery control strategy is added,and the vehicle control strategy based on Simulink is determined according to the above control strategy.Finally,the analysis of the combined simulation results of Cruise/Simulink shows that the distributed drive pure electric vehicle not only meets the requirements of design and development,but also has better power and economy performance than non-distributed driven pure electric vehicles.The control strategy designed and developed is applicable to the performance research of the vehicle,and provides reference value for further research on distributed drive pure electric vehicles.