【摘要】：環(huán)境與能源問題是現(xiàn)代汽車工業(yè)發(fā)展前進(jìn)路上的巨大挑戰(zhàn),這也促使了人們對新能源汽車的研究逐步深入。其中,電動汽車以零污染、低噪音、高效率、驅(qū)動多樣化等眾多優(yōu)點在新能源汽車中獨樹一幟,成為新能源汽車產(chǎn)業(yè)發(fā)展的趨勢。當(dāng)前,電動汽車?yán)m(xù)駛里程短的問題是限制其廣泛推行的重要原因。而電動汽車的再生制動系統(tǒng)以其降低電動汽車能耗的優(yōu)勢成為近年來電動汽車研究領(lǐng)域的熱點。本文以電動物流車的再生制動系統(tǒng)為研究對象,首先,分析了再生制動的原理、儲能方式的分類、制動能量回收的制約條件,提出了再生制動控制系統(tǒng)的整體設(shè)計要求。然后,研究分析電動汽車動力系統(tǒng)的組成及其驅(qū)動系統(tǒng)的布置,通過對整車主要技術(shù)參數(shù)及動力性、經(jīng)濟(jì)性要求的分析,確定電動物流車的關(guān)鍵部件和動力系統(tǒng)的整體布置方案。在對車輛制動過程進(jìn)行受力分析的基礎(chǔ)上,結(jié)合ECE制動法規(guī)對前、后軸摩擦制動力的分配要求,確定電動汽車前、后軸摩擦制動力分配系數(shù)的取值范圍。在保證制動安全穩(wěn)定的前提下,擬合理想前、后制動力分配曲線,并根據(jù)不同的制動強(qiáng)度分配電機(jī)再生制動力、前、后軸摩擦制動力的制動份額,建立基于制動強(qiáng)度的電-液復(fù)合再生制動系統(tǒng)控制策略的數(shù)學(xué)模型。在ADVISOR中對電動汽車的再生制動控制策略模塊進(jìn)行二次開發(fā)。首先,結(jié)合關(guān)鍵部件的主要技術(shù)參數(shù),搭建電機(jī)、動力電池以及動力傳動系統(tǒng)的仿真模塊。然后,在研究分析ADVISOR中原再生制動控制策略的基礎(chǔ)上,修改建立電-液復(fù)合再生制動控制策略的制動前向仿真模塊、后向仿真模塊及相關(guān)外圍模塊。最后,在選定的NYCC和UDDS循環(huán)工況下,對本文所設(shè)計的再生制動控制策略和原再生制動控制策略進(jìn)行對比仿真。分析結(jié)果表明:本文所設(shè)計的電-液復(fù)合再生制動控制策略能夠在保證制動過程安全穩(wěn)定的情況下,提高再生制動力的分配份額,獲得更高的制動能量回收率。
[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.
【學(xué)位授予單位】：南京林業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U463.5

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本文編號：2409307