Research On Active Steering Control Of Commercial Vehicles Under The Influence Of Lateral Wind

With the large-scale construction of China’s highways and the maturity of the logistics industry,commercial vehicle ownership has increased,actual vehicle speeds have continued to increase,and the impact of crosswinds on commercial vehicle driving stability and safety has become increasingly important.Increasing stability under the influence of crosswinds is becoming one of the key issues that must be solved to study the active safety of vehicles.Active front wheel steering is when the vehicle makes a steering action,a certain amount of steering angle is superimposed on the basis of the corresponding front wheel rotation angle,which is independent of the driver’s steering operation and is an optimized response to the driver’s steering operation,To improve the driving stability and safety of the vehicle.The active front wheel steering system is similar to the combination of traditional power steering and wire-controlled steering.It not only has the structural foundation of power steering,but also has the advantages of convenient and concise wire control system,which can actively control the driving of the vehicle.Therefore,active front wheel steering has become a research and development hotspot in the field.In this paper,research is started on the basis of on-line steering.First,based on the development status of the wire-by-wire steering system and active steering at home and abroad,the structural characteristics and working principles of the wire-by-wire steering system are introduced.Secondly,use TruckSim to model the commercial vehicle dynamics model and wind field environment,and determine the ideal state of the vehicle based on the steady state of the linear two-degree-of-freedom vehicle model,and then derive the ideal yaw angular velocity in the ideal vehicle traveling.Considering that in actual car bodies,sensors for yaw rate and centroid sideslip angle are expensive,so the previous wheel angle and longitudinal speed are designed as input without trace Kalman filter observer,which can perform relevant parameters of commercial vehicles under the influence of lateral wind Observe.Then,the tracking control of the yaw angular speed is carried out through a combination of fuzzy control and PID control,and the front wheel turning angle of the commercial vehicle is corrected through feedback adjustment.Finally,joint simulation was performed using TruckSim and Simulink.The results show that the steering strategy of the commercial vehicle steer-by-wire system proposed in the paper can adjust the front wheel turning angle in time under the influence of lateral wind,effectively improving the vehicle’s handling stability and Active safety,laying a theoretical foundation and practical support for future hardware-in-the-loop bench experiments.