全文总字数：20128字
1. 研究目的与意义（文献综述）
backgroundand significance of the topic
with the rapid development of theautomobile industry and road transportation system, the car ownership hasincreased rapidly [1]. the exponential growth of the number of cars hasalso caused a sharp expansion of pollution. the air pollution caused by carshas exceeded the environmental self-purification capacity. this kind ofpollution is not only harmful to human beings, but also harmful to theenvironment, which harms the ecological balance in nature [2], so the pollution caused by automobiles is a seriousproblem.
in today's society where environmentalproblems are becoming more serious and oil resources are becoming increasinglytight, electric cars that combine all the advantages stand out. electricvehicles refers to vehicles that driven by on-board power and drive wheels withmotors, which meet the requirements of road traffic and safety regulations [3].with the continuous development of battery and motor technology, electricvehicles have ushered in a new opportunity, and set off a new round ofworldwide boom: in the face of the adjustment of global energy structure,seizing the highlands of industrial competition and the new situation ofprotecting environmental, major developed countries all over the world have setthe development of the ev industry to the national strategic level [4-6].
2. 研究的基本内容与方案
（1）the basic content
- introduce the background and significance of the research, and collect relevant papers on braking energy recovery control strategies for pure electric vehicles, and then analyze the current development status of braking energy recovery technology at home and abroad.
- understand the electromechanical braking system of pevs, an do in-depth researches of the braking energy recovery of the working principle and process and analyze the factors of the braking energy’s effect.
- according to the requirements of the braking system, select the main components of the automobile drive system, and calculate the relevant parameters.
- based on avl-cruise software, build dynamic model of pure electric vehicle, including vehicle model, battery model, motor model, transmission system model, wheel model, brake model, etc., and perform simulation analysis and calculation.
- according to the ece regulations, considering both braking efficiency and braking energy recovery effect, a braking energy recovery control strategy and control algorithm should be proposed, and a pure electric vehicle control strategy model should be established based on matlab / simulink.
- the matlab / simulinkcontrol strategy model is imported into the avl-cruise model through a dll fileto realize joint simulation. the simulation calculation is performed under theconditions of nedc and ftp75. then evaluate the feasibility of the strategywith recovery rate, soc value, and driving range as three indexes whenregenerative braking is on and off.
（2）the target
the ability to achieve regenerative braking is aprominent feature of electric vehicles. a properly designed regenerativebraking system can increase the car's driving range. the regenerative brakingof electric vehicles needs to achieve the fundamental goal: on the basis ofensuring the safety of braking, to maximize the recovery of braking energy,meeting the requirements of passenger comfort.
3. 研究计划与安排
| Week (time) | Content |
| 1-2 (18th-19th weeks of the 7th semester) | Determine graduation project topics, improve graduation projectassignments (relevant parameters), and collect data inside and outside theschool |
| 3 (1rd week of the 8th semester) | Schemeconception, complete literature search, opening report, foreign languagetranslation, data collection |
| 4 (2nd week of the 8th semester) | In-depthanalysis and research on the principle of regenerative braking and factorsaffecting the recovery effect, selection and matching calculation of maincomponents |
| 5 (3rd week of the 8th semester) | Use software co-simulation to realize three classic regenerationcontrol strategies: ideal braking force distribution control strategy,maximum energy recovery control strategy, and parallel braking controlstrategy |
| 6-8 (4th-6th weeks of the 8th semester) | Propose a control strategy that satisfies the consideration ofbraking safety, braking energy recovery effect, and passenger comfort (3.19 initialreply) |
| 9-11 (7th-9th weeks of the 8th semester) | Joint simulation of the proposed control strategy and algorithm,and analysis of simulation results |
| 12-14 (10th-12th weeks of the 8th semester) | Writing thesis (4.30 Intermediate reply) |
| 15 (13th week of 8th semester) | Students submit defense applications and prepare for the reply;teachers review drawings and instructions |
| 16-17(14th-15th weeks of the 8th semester) | Participate in a final reply |
4. 参考文献（12篇以上）
[1]gao z. the automotiveindustry highlights the comprehensive strength of the manufacturing industry[j].chinese quality miles. 2019, (07): 14.
[2]gupta k, rakesh n. iot based automobile airpollution monitoring system[c]. 8th international conference confluence oncloud computing, data science and engineering, confluence 2018, january 11,2018 - january 12, 2018, noida, uttar pradesh, india, 2018. institute ofelectrical and electronics engineers inc.
[3]wang w, bi r. electric vehicle technologyfoundation[m]. beijing: beijing machinery industry press, 2010: 6-23.
课题毕业论文、开题报告、任务书、外文翻译、程序设计、图纸设计等资料可联系客服协助查找。
