Development And Test Of Functional Logic For Integrated Vehicle Controller Of Electric Vehicle

New energy vehicle technology has become the development trend of contemporary automotive technology.The number of electronic control units inside the vehicle has continued to increase.With the rapid development of power electronics technology.The vehicle controller is integrated with other types of electronic controllers or integrated with its peripheral components to achieve an integrated design of the vehicle control system.the integrated vehicle controller is the future development trend of the vehicle electronic control system technology.Based on the analysis of the logic requirements of the electric vehicle power system and vehicle energy management functions,this paper proposes an integrated vehicle controller solution that integrates the vehicle controller and the motor controller based on the specific development project of the enterprise to complete the integrated vehicle control Analysis of system architecture,functional requirements and functional logic characteristics;research and development of related control functional logic,and real-time verification testing of the developed functional logic.The main research content of the paper is as follows:1)Analysis of electric vehicle power system layout and analysis of external characteristics,efficiency characteristics,overload characteristics,stall characteristics,etc.of the drive motor system;vehicle energy management and electrical system functional logic requirements analysis.2)Based on the company's specific development project,an integrated vehicle controller solution that integrates the vehicle controller and the motor controller is designed.The hardware system architecture and software system architecture analysis of the controller system are analyzed,and the electrical system functional logic analysis is performed.To complete the functional requirements analysis and functional logic analysis of the integrated vehicle controller system.3)Based on the analysis of the functional requirements of the integrated vehicle controller system and the characteristics of the functional logic,complete the basic function logic development of the controller system;combine the vehicle's driving state and gear position to classify and manage the vehicle's dynamic driving control mode,and establish inter-mode Logic conversion relationship;focusing on the vehicle's energy management goals and the functional logic characteristics of the integrated vehicle controller system,combined with the analysis of the operating characteristics of the drive motor system in actual operation,the focus is on completing anti-slide,overload control,and regenerative braking energy recovery Research and development of other functional logic;use MATLAB/Simulink tools to build functional logic models.4)According to the dynamic equation of the electric vehicle under the driving conditions,combined with the experimental data modeling method,this paper establishes the electric vehicle power system model under the MATLAB/Simulink simulation environment.The model includes the power battery,motor system,transmission system,and vehicle power.The model is integrated with the logic model of the control function.The paper completes the offline simulation analysis of the model under the starting,acceleration and comprehensive driving conditions.5)Based on the Development to Production,this paper completes the generation and import of control function model code.Based on the NI-PXI platform to build a hardwarein-the-loop test system and completes the real-time verification test of the developed functional logic.