Modeling and Simulation of the Driving System Based on Fuzzy PI Control in Electric Vehicles

Automobile industry has to face problems such as energy shortages,environmental pollution and global warming,along with its contributions in economic development and improvement of people's living standard. The electric vehicle is the most effective way to solve problems related with energy and environmental pollution. The performance of an electric vehicle is closely related with the driving system to be operated on various driving conditions. This paper combines the balance equation for the vehicle movement with the equation of motor mechanical properties to establish a mathematical model of the driving system of Electric Vehicle(EV) . Fuzzy PI control strategy is used in the model for the optimal control and the model is simulated by the software Simulink. Simulation results show that the mathematical model of the driving system of the electric vehicle can represent the vehicle running states accurately. Fuzzy PI control strategy optimizes the control of the driving system and improves the performance of the simulation in tracing the speed. The simulation model is very robust and applicable to simulate the driving system of electric vehicles.