摘要
鉴于汽车尾翼的不同攻角影响汽车行驶中的燃油经济性、操纵性和制动性,设计了一种电控可调尾翼的减阻系统(DRS)。系统依据与行驶速度有关的气动阻力和气动升力与尾翼攻角之间的关系,利用模糊控制算法确定DRS系统尾翼最佳攻角的控制信号。创建了系统的数学模型,优化了系统各部分的传递函数,并应用于控制器的硬件结构。利用Matlab对系统的稳定性进行了分析,并在实车上进行了验证试验,结果表明该系统改善了汽车的燃油经济性和制动性。
In view of the effects of the attack angle of rear airfoil on the fuel economy and handling and braking performances of vehicle,an electrically controlled drag reduction system (DRS) with adjustable rear airfoil is designed.The system utilizes fuzzy control algorithm to determine the control signal for optimum airfoil attack angle based on the relationship between attack angle and aerodynamic drag and lift related to driving speed.A mathematical model for the system is created and the transfer function of each part of the system is optimized and applied to the hardware configuration of the controller.The stability of the system is analyzed by matlab and a real vehicle verification test is conducted.The results show that the system improves the fuel economy and braking performance of vehicle.
出处
《汽车工程》
EI
CSCD
北大核心
2017年第8期895-899,共5页
Automotive Engineering
基金
全国教育"十二五规划课题"项目(EHA140395)
教育部第49批留学归国人员科研启动基金资助
关键词
汽车
可调尾翼
减阻系统
模糊控制
传递函数
vehicle
adjustable rear airfoil
DRS
fuzzy control
transfer function
