The Research Of Four-Wheel Drive Electric Vehicles Of The Driving Force Distribution Method On Rough Road

As people focus on environmental protection and energy, electric vehicles are used increasingly. The Four-wheel drive vehicles are well produced to prevent the skid phenomenon. The Four-wheel-drive system has a better application efficiency of driving force. Tire traction can not only play more effective, but also has a higher stability and driving security. to improve vehicle driving ability, output torque of the motor are located in four wheels According to different driving surface state. The motor is placed on the front and rear wheel of four-wheel independent drive electric vehicles in order to improve the ability of control on uneven roadVehicle control system is the core operation of vehicles, fast response and high accuracy of electric vehicles are used in the motor drive control for individual wheel torque control, the control is achieved through software programming.Vehicle dynamics simulation model are established by the parameters of motor vehicle. all part of the job characteristics of four-wheel independent drive electric vehicles are analyzed, refer to experimental prototype data, ADAMS software is used to establish vehicle dynamics model, according to the coupling between motor and vehicles, motor and drive control system model are established by the use of MATLAB software.Guaranteed cost controller is designed and guaranteed cost control theory is introduced, control method of drive motor current is proposed for the uneven road surface, the drive system control model is established, the appropriate perturbation model is selected, controller is designed, and simulation is experiment analyzed.The allocation methods research of four-wheel independent drive electric vehicles on the uneven road, vehicle dynamics is analyzed, the required parameters of the approximate analytical solutions and experimental solutions are given for driving force distribution, the accuracy and feasibility of the approximate solution is verified. objective function of distribution of driving force is established, simulation of vehicle control strategy is analyzed and parameter is optimized based on optimization parameters of sliding rate.The feasibility of optimization function by MATLAB and VC++ interface, the optimization is proposed to be applied to real vehicles.