Simulation And Experimental Study Fot Lane Keeping Assist System

With the increase in car ownership,the car has become a necessity for people to live at home.China’s future development direction of the car focused on the three major themes of the car started,energy saving,intelligent,new energy.And intelligent development of the automobile industry is the most attractive place for the masses of the eye,intelligent development can not be separated from the driving safety,traffic safety and other security issues in the face of security issues advanced driving support system was rapid development trend,in addition to the traditional seat belts,Airbags and other passive safety technology,people are more hope that the risk of strangulation in the cradle,which produced a car active safety technology.Active safety technology has aroused widespread concern in the community.This article focuses on the research of car lane keeping system,which is one of the active safety technologies.It not only takes the warning of orbit deviation in the process of driving,but also relies on the active steering technology to control the vehicle to avoid safe and keep the lane.At the same time,the model predictive control strategy of lane keeping system is analyzed in detail on the basis of automobile electric power steering.First,the front wheel steering system is retrofitted,and the transmission mechanism of the assisting angle motor and the planetary gear is added on the basis of the original steering,and the corner control torque which can correct the steering angle of the front wheel and the steering angle of the steering wheel can be corrected.In order to achieve the lane maintenance function,the establishment of the nonlinear model predictive control strategy,the provisions of the road auxiliary coefficient,the controller can correct the driver due to distraction caused by the lane deviation,to complete the correction will continue to control the driver.The driver will be able to determine the driver’s intention to operate,according to the steering wheel torque signal and turn signal signal to determine whether the driver distracting attention,whether the driver in the active control of the driver’s intention to control the driver’s intention Vehicles,to minimize false alarms and to avoid frequent no warning caused the driver to feel impatient.In order to verify the accuracy of the lane keeping system control algorithm,the simulation experiment of Matlab/simulink and CarSim is carried out to provide the theoretical basis for the subsequent hardware test.