Study On Optimization Of Electric Vehicle Traction Control System Base On ADRC Algorithm

In recent years,air pollution and energy shortage are becoming the problem that should be faced seriously.Therefore,the development of environment-friendly vehicle has gradually been a global consensus.However,how to improve the safety and energy efficiency of electric vehicle is still the urgent problem that needs to be solved.Electric vehicles' drive motor,has several advantages including easy and quick control,accurate torque response,and regenerative braking.This study focuses on the control method for electric vehicle parking,traction and braking based on the active disturbance rejection control(ADRC)algorithm,which improves the stability and the energy efficiency of the electric vehicle.First of all,the paper introduces the development status of new energy vehicles and the related structural types Based on the technical advantages,research status and key technical issues of electric vehicles'(EVs')traction system,the topic of this research is proposed.In the EV drive motor system model,the internal and external disturbance factors are analyzed.The field oriented controller based on active disturbance rejection control(ADRC)is built up.An accurate d-q inductance measurement method is also proposed for the first time.This thesis studies the control methods of the EV traction system under three different conditions,i.e.,parking on the ramp,driving anti-skid and regenerative braking.For the parking on the road with unknown slope and load conditions,the factors is studied,which affect the parking safety of the EV on a slope.To solve the issues from the vehicle model non-linearity,time-varying and road uncertainty,an ADRC controller is also proposed to improve the safety of the EV on various roads.For the EV braking on an unknown road,the optimal slip rate is calculated from the motor control system parameters.The ADRC controller is able to improve the braking stability and the regenertive energy efficiency.This research expands the application of ADRC control technology in thetraction control of electric vehicles,which improves the stability and energy efficiency of electric vehicles.