The Development Of Model Based Dual Motor Electric Vehicle Control System

With the attention to environmental pollution and energy consumption,the public are becoming more and more interested in dual-motor electric vehicle,because of the improvement of their range,reliability,security,performance level.As the core of dual-motor electric vehicle technology,the vehicle control system can make the car run in an orderly way.At the same time,as the increase of the complication of control system,the traditional development mode can not satisfy the speed of the system upgrading.In order to improve the efficiency of system development and shorten the development cycle,Model-Based Design as an efficient way of control system development has gradually been taken seriously.Therefore,we apply the idea in the motor control system of electric vehicle development process.The biaxial independent dual-motor drive configuration was regarded as the research object of this article based on the analysis of configuration of the dual motor.Combined with the actual hardware resource requirements,the two motor of electric vehicle controller hardware design was completed successfully.In addition,the dual-motor electric vehicle CAN network was designed completely,and the CANoe facility was used on the CAN network simulation and the load was up to 26.53%.Lastly,the feasibility of the designed CAN bus network was verified.The MATLAB model was established according to the dual-motor vehicle control system of control strategy which used the method of MBD.In particular,the torque distribution strategy based on slip ratio was introduced to realize the optimal torque distribution of front and rear axle motors.The underlying drivers were completed according to the requirements of the vehicle control strategy for resources dual-motor electric vehicle control system which included the underlying program,the Bootloader and CAN calibration procedures.The whole vehicle controller calibration and program loading function were realized at last.Different from the traditional hardware bootloader,this bootloader used the software trigger mode.The MATLAB model of electric vehicle control system was tested by the software in the loop simulation and the hardware in the loop simulation to verify the upper strategy model.The automatic code generation method was used for the MATLAB code generation of the vehicle control system model,and the generated codes could be combined with the strategy of the lower program.The upper and lower strategy codes were integrated on MPC5634 M microcontroller platform to verify the feasibility of the integration code through the bench experiments.Finally,the vehicle control system was developed.