基于线控转向系统的路面参数估计  

Tire-road friction coefficient estimation based on steer-by-wire system

作　　者：郑宏宇[1] 陈国迎[1] 孙琳琳[2] 孔繁森[2] 何磊[1] 宗长富[1] 

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130022 [2]吉林大学机械工程学院,长春130022

出　　处：《吉林大学学报（工学版）》2014年第2期292-295,共4页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51105165);中国博士后科学基金项目(2012T50291);'863'国家高技术研究发展计划项目(2012AA110904)

摘　　要：针对路面信息对于汽车主动安全系统的重要性,提出一种基于先进汽车线控转向系统的轮胎与路面附着系数估计方法。通过建立整车模型和基于卡尔曼滤波算法设计估计器,实现了不依赖于制动系统的前、后车轮路面附着系数估计。通过中心区转向和角阶跃试验工况验证表明,提出的估计算法可以很好地实现对路面附着系数的估计,验证了算法的有效性。Statistics shows that tire-road friction coefficient is critical importance for vehicle active control system. This paper proposes a tire-road friction coefficient estimation method for advanced vehicle steer-by-wire system. A vehicle model is built and a model-based friction coefficient estimator is proposed using Expended Kalman Filter （EKF） technique, which can be used for estimation of vehicle self-align torque and road adhesion condition. Simulation and experiment under on-center handling and steering wheel angle step input conditions were carried out. The results demonstrate the effectiveness and robust of the proposed estimation.

关 键 词：车辆工程 路面附着系数 估计器 线控转向 

分 类 号：U463.4[机械工程—车辆工程]