面向制动踏板感觉的助力器-主缸动力学模型  

Vacuum Booster-Brake Master Cylinder System Dynamic Model for Brake Pedal Feel

作　　者：孟德建[1] 张立军[1] 方明霞[2] 余卓平[1] 

机构地区：[1]同济大学汽车学院,上海201804 [2]同济大学航空航天与力学学院,上海200092

出　　处：《同济大学学报（自然科学版）》2014年第12期1897-1903,共7页Journal of Tongji University:Natural Science

基　　金：中国博士后科学基金(2013M531208);国家自然科学基金(51175380)

摘　　要：面向制动踏板感觉,考虑结构间隙、弹簧预紧力、摩擦力、反作用盘刚度、气体质量流量变化以及制动液体积弹性模量变化,建立了包含关键结构件、气体和液体的真空助力器-制动主缸复杂系统动力学模型.在无真空助力、无/有制动液工况下,分别对真空助力器和制动主缸进行试验,辨识了模型的关键参数.在此基础之上,开展了面向制动踏板感觉的真空助力器-制动主缸系统特性仿真,以进程阶段真空助力器推杆力-行程、主缸油压-行程和主缸油压-推杆力形成的3象限图为评价体系,利用试验分别验证了制动主缸模型、真空助力器机械系统模型和真空助力器-制动主缸系统模型的有效性.For the purpose of brake pedal feel analysis, the dynamic model of vacuum booster-brake master cylinder system was established including the key structure components, gas and liquid. Many factors such as structure clearances, spring pre-load, friction forces, reaction disc stiffness, the change of gas mass flow rate and brake fluid bulk modulus were taken into consideration in the model. Without vacuum assist, the experiments of vacuum booster and brake master cylinder were carried out respectively by using brake fluid or not, and the key parameters of the model were identified. Then, the simulation of vacuum boosterbrake master cylinder system performance was carried out. The simulation results in the stage of on-brake were shown in 3 quadrants figure formed by the vacuum booster pushrod force-stroke curve, the master cylinder-stroke curve and the master cylinder-pushrod force curve. A comparative analysis with experiment results verified the brake master cylinder dynamic model, vacuum booster mechanical system dynamic model, and vacuum booster-brake master cylinder system model.

关 键 词：真空助力器 制动主缸 动力学建模 制动踏板感觉 参数辨识 

分 类 号：U463.51[机械工程—车辆工程]