基于模糊控制的纯电动汽车制动策略研究

发布时间：2018-01-08 03:14

本文关键词：基于模糊控制的纯电动汽车制动策略研究　出处：《天津理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：目前,城市范围内的大气污染问题以及世界范围内的能源危机问题已经引起了人们的广泛关注,导致这些问题的一个重要原因,就是传统汽车的尾气排放和对能源的消耗。虽然我们已经致力于解决这些问题,近几年混合动力汽车的大范围推广和应用,在一定程度上缓解了环境及能源问题。但是这并没有从根本上解决,效果也不是特别的显著。纯电动汽车可以达到没有废气排放和污染的目标,基于其优良的环保性能,彻底解决了由汽车引发的环境污染和能源危机等问题。纯电动汽车和发动机汽车的最大区别就是由电动机取代了传统的内燃机,即在节能和效率等方面明显占优。但是由于经济,技术等方面的限制,目前纯电动汽车的产量并没有太大的增加。其中最为关键的一个问题,就是单次充电后行驶距离较短的问题。通过对制动能量进行回收,不仅可以达到节能的效果,而且在一定程度上能够增加纯电动汽车的行驶距离,而合适的控制策略则直接关系到汽车行驶的安全性和能量回收效率等关键问题。本文着重分析了纯电动汽车的制动策略。通过了解再生制动系统的组成和基本原理,搭建了纯电动汽车再生制动系统的数学模型。根据现有的理想制动力分配策略、并行制动力分配策略、和最优能量回馈策略等主要再生制动策略,制定了一种以汽车制动强度和整车速度为控制目标的模糊制动力分配策略,并且嵌入到ADVISOR软件中,选择不同的工况进行仿真分析。根据本文得出的仿真结果与软件原有的制动策略以及传统的制动策略仿真结果进行对比。结果显示,本文提出的策略,可以明显的提高蓄电池的剩余SOC、制动能量的回收效率以及能量传递总效率。因此,在一定程度上,实现了延长纯电动汽车续驶里程的目标。
[Abstract]:At present, the problem of air pollution in the city and the energy crisis in the world have aroused widespread concern, leading to an important cause of these problems. Although we have been working to solve these problems, in recent years, hybrid vehicles have been widely used and popularized. To some extent, the environmental and energy problems have been alleviated. But this has not been fundamentally solved, nor has the effect been particularly significant. Pure electric vehicles can achieve the goal of no emissions and pollution. Based on its excellent environmental performance, the problem of environmental pollution and energy crisis caused by automobile has been solved thoroughly. The biggest difference between pure electric vehicle and engine car is that the motor has replaced the traditional internal combustion engine. That is, in the aspects of energy saving and efficiency, but due to the economic, technical constraints, the current production of pure electric vehicles has not been greatly increased. One of the most critical issues. Through the recovery of braking energy, not only the effect of energy saving can be achieved, but also the driving distance of pure electric vehicle can be increased to a certain extent. The proper control strategy is directly related to the safety of the vehicle and the efficiency of energy recovery. The braking strategy of the pure electric vehicle is analyzed in this paper. The composition and the basic principle of the regenerative braking system are understood. Reason. The mathematical model of regenerative braking system of pure electric vehicle is built. According to the existing ideal braking force allocation strategy, parallel braking force distribution strategy, and optimal energy feedback strategy, the main regenerative braking strategies are proposed. A fuzzy braking force allocation strategy based on vehicle braking strength and vehicle speed is developed and embedded into ADVISOR software. According to the simulation results obtained in this paper, compared with the original braking strategy of the software and the traditional braking strategy simulation results. The results show that the strategy proposed in this paper. The residual SOC of battery, the recovery efficiency of braking energy and the total efficiency of energy transfer can be improved obviously. Therefore, the goal of prolonging the driving range of pure electric vehicle is achieved to a certain extent.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U469.72

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