Research And Implementation Of Steering Control Algorithms For Intelligent Parking

With the continuous increase of car ownership in China,the pressure on the urban parking facilities is further increased.It also puts forward higher requirements for the driver's parking driving technology.With the Development of New Energy Vehicles,the number of electric vehicles entering the market is increasing,which makes the intelligent driving technology have a basis for considerable progress.Compared with traditional fuel vehicles,it is easier for electric vehicles to develop intelligent driving technology.Intelligent parking technology is a branch of intelligent driving technology.It can serve as a forerunner in the study of intelligent driving technology,and it will greatly help solve the technical problems of parking operation caused by complex parking conditions in cities.Steering control is a big difficulty in intelligent parking technology.Whether the steering control is good or not is related to the efficiency and even safety of intelligent parking process.This paper describes the research on steering control in an intelligent parking project based on a domestic brand electric vehicle.Firstly,this paper describes the hardware framework of the whole intelligent parking system,analyses the circuit characteristics of the original steering control system of this electric vehicle,and builds the circuit for the research of this subject.Secondly,it simplifies the problems that need to be solved.According to the basis that the intelligent parking system controls the steering system of the vehicle by controlling electric power-assisted steering,it simplifies the control of steering system to the control of the torque output of power steering motor,and then gives the control strategy of steering system by calibration operation of steering system.Thirdly,through the analysis of the difference between the actual use of vehicles and the standard operation conditions,it adjusts the corresponding control strategies according to the difference of working conditions.And then,Based on the control strategy,steering control algorithm is established by using MATLAB/Simulink software,including the total control state transition diagram and the generating function of steering moment analog voltage DA value.Finally,the steering controlalgorithm model is converted into embedded C programming language and compiled into embedded system chip of intelligent parking system.The vehicle experiment is carried out and data analysis is collected to verify the function and control effect of the steering control algorithm model.The steering control algorithm model is finally validated through the real parking experiment of intelligent parking system.