HEV再生制动与ABS协调控制仿真研究

发布时间：2018-03-24 05:34

本文选题：混合动力汽车　切入点：再生制动　出处：《长安大学》2016年硕士论文

【摘要】：节能和环保是当今世界的主题,人们希望通过改善环境来提高自身的生活质量。近些年来,雾霾、PM2.5(可吸入细颗粒物)逐渐成为人们口中谈论的话题,然而矛头开始指向汽车尾气排放。纯电动车没有尾气排放,但是其续航里程短,成本高、电池寿命短限制了其发展。混合动力汽车(HEV)采用传统内燃机和蓄电池共同驱动车辆行驶,续航里程相对较长而且在一定程度上降低了尾气排放。制动能量可回收是混合动力汽车的一大特色,然而再生电机的加入势必会影响汽车的制动力分配,进而影响汽车的制动安全性和稳定性。现如今ABS防抱死系统广泛应用,再生电机制动系统和ABS制动系统必然会共同控制车辆。但是电机再生制动系统和ABS系统会出现控制不协调的问题,甚至会出现车轮抱死的危险工况。为了确保混合动力汽车在制动稳定性和安全性的前提下尽可能回收制动能量,同时解决再生制动系统与ABS制动系统的控制矛盾,本文进行了以下几方面工作:首先通过分析传统汽车制动特性,进一步研究了混合动力汽车制动力分配情况。提出基于ECE制动法规来确定混合动力汽车前后轴制动力分配系数的范围,推导出电机需求峰值制动力矩,进而建立出HEV制动力分配策略。其次为解决再生制动系统和ABS防抱死系统之间的控制不协调的问题,本文基于逻辑门限控制策略,通过设置两个提前触发的门限值,搭建出HEV再生制动与ABS集成控制策略。最后基于MATLAB/Simulink平台,建立前向路径和后向路径制动力分配模型,通过ADVISOR仿真软件进行仿真,将其仿真结果与ADVISOR缺省策略仿真结果进行对比。仿真结果显示本文设计控制策略可以在保证制动稳定和安全情况下,回收更多的制动能量,改善排放和降低燃油消耗。而且解决了再生制动与ABS液压制动之间的控制矛盾,实现了两者的协调控制。
[Abstract]:Energy conservation and environmental protection are the main themes of the world today, and people want to improve their quality of life by improving the environment. In recent years, haze PM2.5 has become a topic of discussion. But it started to point to car emissions. Pure electric cars don't have emissions, but they have short range and high costs. The short battery life limits its development. Hybrid electric vehicles (HEV) use conventional internal combustion engines and batteries to drive vehicles together. Braking energy recoverability is a major feature of hybrid electric vehicles, but the addition of regenerative motors will inevitably affect the braking power distribution of the vehicle. And then affect the braking safety and stability of the automobile. Nowadays, ABS anti-lock braking system is widely used, The braking system of regenerative motor and the braking system of ABS will certainly control the vehicle together, but the problems of uncoordinated control between the regenerative braking system of motor and the system of ABS will appear. In order to ensure the braking stability and safety of hybrid vehicle, the braking energy can be recovered as much as possible, and the control contradiction between regenerative braking system and ABS braking system can be solved at the same time. The following work is done in this paper: firstly, by analyzing the braking characteristics of traditional automobile, The braking force distribution of hybrid electric vehicle is further studied. The range of braking force distribution coefficient of front and rear axle of hybrid electric vehicle is determined based on ECE brake regulations, and the peak braking torque of motor demand is deduced. Secondly, in order to solve the problem of uncoordinated control between regenerative braking system and ABS anti-lock braking system, based on the logic threshold control strategy, this paper sets two threshold values that trigger ahead of time. The integrated control strategy of HEV regenerative braking and ABS is built. Finally, based on the MATLAB/Simulink platform, the forward path and backward path braking force distribution models are established and simulated by ADVISOR simulation software. The simulation results show that the control strategy designed in this paper can recover more braking energy under the condition of ensuring braking stability and safety. The control contradiction between regenerative braking and ABS hydraulic brake is solved and the coordination control between them is realized.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.5

【参考文献】