《基于MATLAB汽车离合器接合性能仿真毕业论文》由会员分享，可在线阅读，更多相关《基于MATLAB汽车离合器接合性能仿真毕业论文（44页珍藏版）》请在金锄头文库上搜索。
1、基于MATLAB汽车离合器接合性能仿真-毕业论文目 录摘 要 Abstract1 绪论1 1.1 AMT自动离合器的发展2 1.2 AMT自动离合器发展现状3 1.3 自动变速器的研究方向4 1.4 自动离合研究的难点与重点5 1.5 论文研究的主要内容62 AMT离合器工作原理和接合性能研究7 2.1 AMT原理和结构82.1.1 概述92.1.2 电控单元ECU102.1.3 离合控制系统112.1.4 传感器、电控软件12 2.2 离合器接合特性分析132.2.1 力学模型分析142.2.2 离合器的三种状态分析152.2.3 AMT离合器起步过程分析16 2.2.4 离合器接合指标17
2、3 离合器的建模与仿真18 3.1 MATLAB/SIMULINK简介19 3.2 AMT离合器力学模型的建立20 3.2.1假设条件21 3.2.2 发动机转矩输出模型22 3.2.3 离合器动力学模型建立234 离合器接合过程分析24 4.1 离合器角速度25 4.2 滑磨功和温度26 4.3 冲击度27 4.4 发动机输出转矩285 AMT离合器试验台搭建简介296 展望307 致谢31参考文献32附录33摘 要 电控机械式自动变速器就是人们平常称的AMT，AMT为Automated Mechanical Transmission三个英文单词的缩写，能根据汽车的运行速度快慢，油门节气门的
3、开度大小，驾驶人员的主观直接指令等一系列确定和模糊的参数，来选取合适的换挡时机，保证汽车行驶的最佳档位。AMT没有增添新的机械操纵部分，保存了原本老式的变速箱机构，省略了驾驶员的踩离合，换挡等。也就是在原有的变速箱基础上增加一个智能的控制器和执行机构，通过某种控制策略对发动机，离合器，整车传动机构进行协调控制，自动完成选挡和换挡操作。AMT的核心技术是微机控制，电子技术质量，生产工艺的品质。 随着经济的发展，在环保和节约成为当今的主题，当前在中国对排放标准和燃料要求越来越符合环保节能的形势下。AMT是一个很好的选择。主要表现在与三种变速器相比： （1）与AT（液力变矩器自动变速器）相比：动力性
4、能好：传动效率比一般的变速器高，动力传递没有损耗。省油：比起一般的变速器来说运用微机智能控制策略。生产成本低：相比于一般的机械变速器，AMT的生产成本低。维护成本低：低成本的优势也就造就低的成本的维护。 （2）与MT（手动变速器）相比：操作更加便捷：智能换挡，驾驶无需离合。动力更加强大：传动效率高，动力传输无损耗。更省油：微电脑控制系统，换挡时机掌握更准确。安全性更加优异：模仿最优秀的驾驶员行驶，避免错误操作。 （3）对比与CVT（机械式无级变速器）：便于生产：成本低。维护方便：成本低，维护方便。产品可匹配性好。 但与以上的变速器相比，AMT的顿挫感虽然比较强烈。然则由于具备传动效率高，机械结
5、构紧凑，制造成本低，方便大批量制造，工作性能可靠稳定，以及操纵简捷等优点，尤其是对于燃油经济性的考虑。使得AMT越来越受到各国的青睐。是以对离合器接合特性的研究具有十分重大的意义。本文的重点包括四方面的内容： (1)对AMT变速器的演变历史和发展做简要概述以及AMT变速器相比于当下流行的变速器的优缺点对比。 (2)理论的对总的汽车动力和AMT离合器接合过程以及评定指标进行动力学分析。 (3)建立动力源（发动机）模型，汽车阻力模型，离合器角速度输出模型。 (4)对假设条件下汽车运行离合器离合仿真并分析仿真结果。关键词 变速器 AMT 动力学分析 仿真Abstract AMT (automated
6、 mechanical transmission (AMT), according to the vehicle speed, throttle throttle opening size, drivers subjective direct instruction and so on a series of determine and fuzzy parameters, to select the appropriate timing of the shift to ensure vehicle optimum gear. AMT did not increase the new mecha
7、nical control part, retained the original old gearbox, omitted the human step on the clutch, shift and so on. Is in the original gearbox based on increased an intelligent controller and actuator, strategy of engine, clutch, vehicle driving mechanism were coordinated control through a control, automa
8、tic gear selection and shift operations. AMT core technology is computer control, electronic technology, production quality. Chinas current emission standards and fuel requirements are increasingly stringent under the situation. AMT is a good choice. Compared with the three kinds of transmission: (1
9、) Compared with AT (torque converter automatic transmission), the dynamic performance is good: the transmission efficiency is higher than the general transmission, power transmission is no loss. The fuel-efficient than transmission generally using microcomputer intelligent control strategy. The prod
10、uction cost is low: compared with the general mechanical transmission, the production cost of AMT is low. The maintenance cost is low: low cost also makes maintenance and low cost. (2) Compared with MT (manual transmission), the operation is more convenient: intelligent shift, driving without clutch
11、. The power is more powerful: the transmission efficiency is high, the power transmission has no loss. The more fuel-efficient: microcomputer control system, shift timing is more accurate. The more excellent safety: imitation the best driver, avoid the wrong operation. (3)Compared with CVT (mechanic
12、al type continuously variable transmission), it is easy to produce: low cost. Easy maintenance: low cost, easy maintenance. The product can be well matched.But compared with the transmission over AMT, the strong sense of frustration. Due to the high transmission efficiency, compact structure, low co
13、st, easy manufacture, reliable work, and convenient manipulation and other advantages, especially suitable for the characteristics of fuel-efficient. Makes AMT more and more favored by all countries. So the research on the characteristics of the combination is of great significance. The focus of this p
