AFS/DYC协调控制下汽车侧风稳定性研究  

Study on crosswind stability of vehicle based on AFS/DYC integrated control

作　　者：朱志林 汪怡平[1] 袁晓红[1] 李文杰 ZHU Zhilin;WANG Yiping;YUAN Xiaohong;LI Wenjie(School of Automotive Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学汽车工程学院,武汉430070

出　　处：《重庆理工大学学报（自然科学）》2024年第7期78-85,共8页Journal of Chongqing University of Technology：Natural Science

基　　金：湖北省支持企业科技创新发展专项(2021BA015);湖北省科技重大专项(2021AAA006)。

摘　　要：针对高速汽车在侧风环境下的气动稳定性问题,基于车辆空气动力学与车辆动力学构建了动态双向耦合模型,通过采用相平面法确定主动前轮转向(AFS)和直接横摆力矩控制(DYC)的工作时机,实现汽车AFS和DYC的协调控制,以改善汽车的操纵稳定性。研究结果表明:在侧风的作用下,有、无协调控制的车辆最大侧向位移分别为0.23 m和1.24 m,最大偏航角分别为1.92°和2.89°;最大侧向位移减小了81.5%,最大偏航角减小了33.5%,汽车的侧风稳定性得到明显改善。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.

关 键 词：动态双向耦合 侧风稳定性 协调控制 主动前轮转向 直接横摆力矩 

分 类 号：U461.1[机械工程—车辆工程]