Research For Torque Distribution Of Front And Rear Dual Motors Electric Vehicle Based On Sliding Mode Control

Since twenty-first Century,in the face of more and more serious depletion of oil resources and environmental pollution,electric vehicles with low carbon,environmental protection have become the main direction of the development of automobile.The front and rear axle dual motor electric vehicle is installed on the front and rear axles with two drive motors,and directly to the wheels to provide driving torque,can simplify the vehicle structure layout,improve the transmission efficiency,can independently control and drive motor,has good prospects for development.In the case of the electric vehicle running in a straight line and under bending condition,the front and rear drive motors need to output the appropriate driving torque to ensure the safe driving of the vehicle,so in this paper,the motor torque distribution strategy is discussed for front and rear axle dual motor electric vehicles.In this paper,based on the existing research at home and abroad,the main research work is as follows:1.A Carsim dynamic model of front and rear axle dual motors vehicle is built;An ideal model of two degrees of freedom is established,and the ideal yaw rate and sideslip angle of the vehicle are obtained.2.The torque distribution of the front and rear shafts is studied theoretically.The relationship between the drive torque and the wheel attachment ratio and slip rate is verified,and a torque distribution strategy based on sliding mode observer is designed to ensure the safety and efficiency of the whole vehicle.3.Using the Carsim/Simuilink simulation platform built around the axis of double motor torque distribution system,and through the double lane change simulation experiment put forward the traditional strategy and the strategy are compared to verify the effectiveness of the torque allocation strategy involved in this.