Research On Control Strategy To Improve The Handling And Stability Of Distributed Rear Drive Electric Vehicles

In recent years,with the improvement of people's economic foundation,the automobile,a luxury of the past,has entered thousands of households.However,at the same time,the environmental and energy problems caused by automobiles,such as exhaust emissions and excessive consumption of oil,have become increasingly serious.The market has paid more attention to the energy conservation and environmental protection of automobiles.As a representative of energy conservation and environmental protection,new energy vehicles market share is also more and more heavy,the state has issued more policies to increase support for new energy.Among them,the distributed drive electric vehicle has been greatly favored by the domestic and foreign automobile market because of its energy supply mode and unique handling performance.At the same time,with the market demand for vehicle handling and stability performance,similar to the direct yaw torque control technology,drive anti-skid technology has been developed,and its development and research has attracted much attention.Based on the distributed rear drive electric vehicle,combined with direct yaw torque control technology and drive anti-skid technology,the vehicle handling stability is studied.The main contents of this paper are as follows:Firstly,a distributed rear drive electric vehicle model is established.Refer to the body parameters of a rear drive electric vehicle,such as vehicle mass,front and rear wheelbase,center of gravity height,etc.The distributed rear drive electric vehicle model is established by using ADAMS and MATLAB / Simulink software,including wheel assembly,suspension assembly,body assembly,steering assembly and motor model,which lays the foundation for the research and verification of control method.Secondly,the operational stability control strategy is studied.According to the characteristics of distributed rear drive electric vehicle,the two methods of direct yaw torque control and drive anti slip control using driving wheel are studied to improve the handling stability of the vehicle.The direct yaw torque controller and drive anti-skid controller are established in order to improve the stability of the vehicle in the process of driving.At the same time,the switching strategy of direct yaw torque control and drive anti-skid control is designed.The results show that the research method can improve the vehicle handling stability.Finally,considering the difficulty of real vehicle verification,the driver simulator Logitech G27 is used to verify the direct yaw torque control strategy.The results show that the control strategy has a good control effect in the control of vehicle driving stability.