Influence Analysis of the Tire Runout on the Heavy-Duty Steering Characteristics Based on Simulink
In the process of steering,the tire runout under the influence of the ground load,which has an important impact on the stable steering of the vehicle.The contact between the vehicle and the ground is realized through the tire,and the tire force directly affects the steering stability of the vehicle.Based on this,the angle deviation of high and low speed steering under no-load and full load conditions was analyzed.The wheel swing error and slip were analyzed under the condition of no-load and full load,and the optimal mathematical model of each parameter under different working conditions was obtained.According to the mathematical model analysis,a steering system model with load-bearing characteristics was built based on Simulinkto analyze the influence of tire force and tire runout on steering under different speed conditions.In order to verify the reliability of the mathematical model and simulation analysis,the difference of the relationship between the running track and the turning angle was compared and ana-lyzed under the condition of double lane change steering.The results show that:during the steering process,the change trend of lat-eral force of each tire is basically the same.With the increase of vehicle speed,the lateral force on each tire also increases.With the increase of the speed,the force on the inner tire of the front axle first decreases and then increases.Under full load,the influence of wheel runout on wheel swing error increases with the increase of wheel angle,while under no load,the influence is greater and the change trend is more complex.The real vehicle test and simulation track are basically consistent,and the steering angle curve of the outer wheel basically has no big change,and the consistent characteristic is maintained,and the error is less than 3%,which shows the accuracy of the mathematical model and simulation analysis,and provides a reference for this kind of design.
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