Design Of Steering System In Driving Simulator

In the process of research and development of automobile technology,it has been an important test method to use driving simulator to test driver in the loop with the advantages of good safety,high reliability,convenient research and low cost.Steering system is the key part of driving simulator,which is responsible for the function of realizing the driver’s steering intention and feedback the tire and road contact information to driver,which directly affects the test effect of the driving simulator.Therefore,it is very important to study the road feel modeling and the return control of the steering system of the driving simulator.This paper designs the steering system of the driving simulator based on the project of research group.The overall design of the steering system is carried out,and the design scheme of using torque motor as actuator is determined,and the main components are selected.The feedback torque model of steering wheel is established by dynamic modeling method,including steering system model,tire return torque model and steering assist torque model.In order to solve the problems of unclear road feel,no mechanical limit device in steering system,severe steering wheel jitter on bumpy road,insufficient low-speed return and overshoot of high-speed return,the control strategies of damping compensation,limit control,two-stage filter and release return are designed based on the original feedback torque.In order to make the motor better track the target control current,the fuzzy incremental PID control algorithm is designed to realize the closed-loop control of torque motor.The upper controller software is designed,and the steering system test platform is built based on d SPACE and Car Sim.The results show that the steering system designed in this paper can ensure light steering at low speed,provide clear road feel at high speed,have good limit effect,and can effectively eliminate the steering wheel jitter,The driver can clearly feel the middle position of the steering wheel.After releasing,the steering wheel can return to the center quickly and accurately without insufficient and overshoot return.The steering system can provide appropriate road feel feedback,meeting the design requirements.