Research on Handling Stability Control of Four-Wheel Drive Electric Vehicle on Road with Variable Adhesion Coefficient
In order to solve the problem of the change of the peak adhesion coefficient and adhesion utilization ratio of four-wheel drive electric vehicles,a control strategy of direct yaw moment control was proposed to improve the handling stability.This strate-gy adopts the hierarchical control,the upper controller is responsible for the tracking of the target velocity,slip ratio adjust torque calculation,and achieves the coordinated control of sideslip angle and yaw rate according to the driving danger degree.The low-er controller includes an allocation algorithm aiming at optimal tire utilization and an allocation algorithm integrating slip ratio control,which can be switched according to the slip ratio.The Carsim-Simulink co-simulation results show that,compared with the average torque distribution control strategy,the control strategy can make the vehicle have good handling stability while keep-ing each wheel in the optimal slip ratio range,and effectively improve vehicle performance when driving on the split road.
Four-Wheel Drive Electric VehicleDirect Yaw Moment ControlHierarchical ControlAdhesion Co-efficientSlip Ratio Control
万方数据
维普
