电动物流车的电—液复合再生制动控制策略研究

发布时间：2019-01-16 01:25

【摘要】：环境与能源问题是现代汽车工业发展前进路上的巨大挑战,这也促使了人们对新能源汽车的研究逐步深入。其中,电动汽车以零污染、低噪音、高效率、驱动多样化等众多优点在新能源汽车中独树一帜,成为新能源汽车产业发展的趋势。当前,电动汽车续驶里程短的问题是限制其广泛推行的重要原因。而电动汽车的再生制动系统以其降低电动汽车能耗的优势成为近年来电动汽车研究领域的热点。本文以电动物流车的再生制动系统为研究对象,首先,分析了再生制动的原理、储能方式的分类、制动能量回收的制约条件,提出了再生制动控制系统的整体设计要求。然后,研究分析电动汽车动力系统的组成及其驱动系统的布置,通过对整车主要技术参数及动力性、经济性要求的分析,确定电动物流车的关键部件和动力系统的整体布置方案。在对车辆制动过程进行受力分析的基础上,结合ECE制动法规对前、后轴摩擦制动力的分配要求,确定电动汽车前、后轴摩擦制动力分配系数的取值范围。在保证制动安全稳定的前提下,拟合理想前、后制动力分配曲线,并根据不同的制动强度分配电机再生制动力、前、后轴摩擦制动力的制动份额,建立基于制动强度的电-液复合再生制动系统控制策略的数学模型。在ADVISOR中对电动汽车的再生制动控制策略模块进行二次开发。首先,结合关键部件的主要技术参数,搭建电机、动力电池以及动力传动系统的仿真模块。然后,在研究分析ADVISOR中原再生制动控制策略的基础上,修改建立电-液复合再生制动控制策略的制动前向仿真模块、后向仿真模块及相关外围模块。最后,在选定的NYCC和UDDS循环工况下,对本文所设计的再生制动控制策略和原再生制动控制策略进行对比仿真。分析结果表明:本文所设计的电-液复合再生制动控制策略能够在保证制动过程安全稳定的情况下,提高再生制动力的分配份额,获得更高的制动能量回收率。
[Abstract]:The problem of environment and energy is a great challenge to the development of modern automobile industry. Among them, electric vehicles have many advantages such as zero pollution, low noise, high efficiency, driving diversification and so on, which become the trend of the development of new energy automobile industry. At present, the problem of short driving mileage of electric vehicles is an important reason to restrict its wide implementation. The regenerative braking system of electric vehicle (EV) has become a hotspot in the field of electric vehicle research in recent years because of its advantages of reducing the energy consumption of electric vehicle. In this paper, the regenerative braking system of electric logistics vehicle is taken as the research object. Firstly, the principle of regenerative braking, the classification of energy storage methods and the restriction conditions of braking energy recovery are analyzed, and the overall design requirements of regenerative braking control system are put forward. Then, the composition of the electric vehicle power system and the layout of the drive system are analyzed, and the main technical parameters, power performance and economic requirements of the whole vehicle are analyzed. Determine the overall layout of the key components and power system of the electric logistics vehicle. On the basis of force analysis of vehicle braking process, the range of friction braking force distribution coefficient of front axle and rear axle of electric vehicle is determined according to the distribution requirements of front and rear axle friction braking force according to ECE brake law. On the premise of ensuring the safety and stability of the brake, fitting the distribution curve of the ideal braking force before and after, and according to the different braking strength, distributing the regenerative braking force of the motor, the braking share of the friction braking force of the front and rear axle, A mathematical model of control strategy of electro-hydraulic composite regenerative braking system based on braking strength was established. The regenerative braking control strategy module of electric vehicle is developed in ADVISOR. First, the simulation module of motor, power battery and power transmission system is built according to the main technical parameters of key components. Then, on the basis of studying and analyzing the original regenerative braking control strategy in ADVISOR, the braking forward simulation module, backward simulation module and related peripheral modules of electro-hydraulic compound regenerative braking control strategy are modified. Finally, under the selected NYCC and UDDS cycle conditions, the regenerative braking control strategy designed in this paper is compared with the original regenerative braking control strategy. The results show that the electro-hydraulic composite regenerative braking control strategy designed in this paper can increase the distribution of regenerative braking force and obtain a higher braking energy recovery under the condition of ensuring the safety and stability of the braking process.
【学位授予单位】：南京林业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U463.5

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