METHOD FOR CONTROLLING TRACTION IN INDEPENDENT DRIVE TYPE ELECTRIC VEHICLE

摘要

PURPOSE: A method for controlling a traction in an independent drive type electric vehicle is provided to distribute reference torque to each motor and restrain an over-slipping phenomenon by using an independent driving method. CONSTITUTION: A driving control algorithm is formed with a driven electric vehicle or an electric vehicle model part(201) and a driving control portion(202) connected with the driven electric vehicle or the electric vehicle model part(201). A reference slip difference between a left and a right driving wheel is obtained by using a reference steering angle, a reference reentering angle, and a vehicle speed. Each practical slip ratio of the left and the right driving wheels are obtained. A practical slip difference between the left and the right driving wheels is obtained by the each slip ratio. A differential torque value is obtained by the reference slip difference and the practical slip difference. Each reference torque distribution value of the left and the right driving wheels is obtained by using the differential torque value and the reference torque value. The reference torque distribution values of the left and the right driving wheels are weakened by using a torque weakening fuzzy rule. The weakened reference torque distribution values are applied to motors for driving the left and the right driving wheels.