Analysis on the Influence of Load-Bearing Change on Articulated Vehicle Operation Based on Steering Trajectory
Articulated vehicles are widely used in roadway transportation because of their small turning radius.Then the change of body and container load has an important impact on the operation of vehicles.According to the structure and operation charac-teristics of articulated vehicle,the stress of front and rear vehicle body was analyzed.According to the action characteristics of the front and rear body hinge points,the vehicle steering system was analyzed,and the steering trajectory of each wheel was analyzed to obtain the analysis model at different times.The steering control system model based on Simulink was built.According to the ve-hicle structure,the multi-body dynamics analysis model was built.Comprehensively a controllable joint analysis model was es-tablished.By changing the center of mass position of the rear vehicle body and moving back and forth,the change laws of the run-ning speed,force and steering track of each tire were obtained.Using the actual vehicle and selecting the double line shifting con-dition,the steering track,steering angle error and roll angle of the vehicle were compared and analyzed to verify the accuracy of the model.The results show that:when the load-bearing center of mass changes,the vertical force of each wheel fluctuates greatly,which has a great impact on vehicle operation.When the load-bearing mass center is located in the middle of the vehicle body,the longitudinal and transverse forces borne by the vehicle body are small.When the center of mass moves forward and back-ward,the force increases,and the change is more intense when the center of mass moves first at the rear of the vehicle.This situa-tion should be avoided during loading.The change trend of roll angle and angle error obtained from real vehicle test and simula-tion analysis is basically the same,and the maximum error is controlled within 6.2％,indicating that the accuracy of control model and whole vehicle model can be used as the basis for design and analysis of such vehicles.
万方数据
维普
