Analysis of Body Motion Characteristics Under No-Load High-Speed Steering Condition Based on Simulink
The front axle compound link independent suspension and rear axle rigid axle suspension of a mining truck were ana-lyzed to obtain the roll motion center during steering.The roll angle and load transfer,the key characteristic parameters of vehicle body movement during no-load high-speed steering,were analyzed,and the mathematical model of characteristic parameters was obtained.Based on the mathematical model,the body motion control model under no-load high-speed steering was built by Simulink,and the motion characteristics were analyzed jointly with the vehicle multi-body dynamics model.The steady-state ro-tation condition was selected to analyze the steering characteristics of the system.The roll characteristics of the vehicle during no-load high-speed steering were analyzed,and the variation laws of roll angle,roll displacement and other parameters were ob-tained.The steering angle was compared with the theoretical analysis results,and the steering angle deviation was compared to verify the accuracy of the model.The results show that:when the no-load high-speed steering,due to the body roll,the inner and outer wheels will also have roll angle,and with the body roll,the center of mass steering radius changes dynamically,but the change momentum is small.At the same time,the inner and outer suspension cylinders have telescopic runout,and additional steering effect is superimposed on the wheel at this time.The roll motion has a great influence on the angle characteristics.Consid-ering its influence,the results of the analysis model are basically consistent with the theoretical value,and the error value is less than5％.It also has a great impact on the angle deviation.When the influence of this part is not considered,the deviation increas-es by nearly20％.Therefore,it shows that the influence of this part of factors needs to be considered in the fine design analysis.
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