Study on crosswind stability of vehicle based on AFS/DYC integrated control
To enhance the aerodynamic stability of high-speed vehicles in crosswind conditions,this paper builds a dynamic bidirectional coupling model to integrate vehicle aerodynamics and vehicle dynamics.The timings of active front wheel steering(AFS)and direct yaw moment control(DYC)are determined by the phase-plane method to achieve the coordinated control of vehicle's AFS and DYC and improve its maneuvering stability.Our comparative analysis of the vehicles with and without coordinated controls reveals that,under crosswind influences,the maximum lateral displacement is 0.23 m and 1.24 m,down by 81.5%while the maximum yaw angle is 1.92°and 2.89°,down by 33.5%,demonstrating a marked improvement of vehicles'crosswind stability.
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