面向高级自动驾驶的线控制动系统及压力控制算法研究  

Research on Brake-by-Wire System and Pressure Control Algorithm for Advanced Automatic Driving

作　　者：初亮[1] 常城 王旭[2] 赵迪[1] 许炎武 Chu Liang;Chang Cheng;Wang Xu;Zhao Di;Xu Yanwu(College of Automotive Engineering,Jilin University,Changchun 130022;China Automotive Technology and Research Center Co.,Ltd.,Tianjin 300300)

机构地区：[1]吉林大学汽车工程学院,长春130022 [2]中国汽车技术研究中心有限公司,天津300300

出　　处：《汽车工程》2022年第3期308-318,共11页Automotive Engineering

基　　金：吉林省杰出青年人才基金(20190103160JH);天津市科技计划(20YFZCGX00770)资助。

摘　　要：本文中提出一种满足高级自动驾驶汽车功能需求的线控制动系统,包括两种工作模式:常规制动和冗余制动。无论哪种工作模式,该系统都能将制动踏板和制动压力解耦,并实现主动线控制动功能。针对占绝大部分工作区间的常规制动,采用了一种变等效活塞截面积控制方法,在保证压力控制精度的同时降低液压缸电机的性能要求,并延长其使用寿命。同时为了实现压力精确控制,针对两种工作模式下不同的硬件结构特点,分别提出了基于轮缸p-V特性和电磁阀溢流特性的压力控制算法。最后进行仿真分析与硬件在环试验,证明所提线控制动系统和压力控制算法的可行性和有效性。For the functional requirements of advanced automatic driving,this paper proposes a brake-bywire system,including two operating modes:conventional braking and redundant braking.The system decouples the brake pedal and brake pressure and realizes active braking by wire in both modes.And for the conventional braking that accounts for most of the working intervals,a variable equivalent piston cross-sectional area control method is used to ensure pressure control accuracy while reducing the performance requirements of hydraulic cylinder motor and extending its service life.Meanwhile,to achieve accurate pressure control,pressure control algorithms based on p-V characteristics of wheel cylinders and solenoid valve overflow characteristics are proposed respectively according to the different hardware structure characteristics of the two working modes.Finally,the simulation analysis and hardware-in-the-loop test are carried out.The results show the feasibility and effectiveness of the proposed brake by wire system and pressure control algorithms.

关 键 词：高级自动驾驶 线控制动系统 变等效活塞截面积控制 压力控制算法 

分 类 号：U463.5[机械工程—车辆工程]