| China’s automobile industry is developing rapidly.As a major branch of the intelligent transportation system,driverless cars play a positive role in intelligent transportation and traffic congestion alleviation in China.Among them,automatic steering control is an important part of intelligent control of unmanned vehicles.The accuracy of traditional control algorithm in the actual application process is not high,and the path tracking is still inaccurate in the actual operation process.In this paper,the core objective is to solve the problems of low steering accuracy and insufficient reliability of unmanned vehicles.The specific research contents are as follows:Firstly,the development of automatic steering control system of automobile is analyzed,and the application principle of automatic steering control system,force and torque change in steering process are analyzed.Secondly,aiming at the trajectory change and tracking of the automatic steering control of unmanned vehicles,7-d model and simulation method are used to analyze the tire force,continuous curvature trajectory change and other aspects,and the Angle and precision of automatic steering are controlled by simulation to solve the problem of unsatisfactory control effect.On this basis,through the control rate,stability and other indicators of control,and lane change simulation,double shift simulation analysis,clear automatic steering tracking control.Thirdly,through the design and analysis of the automatic controller,the power,return and Angle of the automatic steering process are controlled to improve the precision of the steering control.Finally,respectively with conventional controller application and automatic steering control of unmanned vehicles for comparison,through simulation and real vehicle tests,the results show that the design and application of the automatic steering control can improve automatic steering control precision of the unmanned vehicle,the vehicle can be accurately within a specified area of the road. |
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