汽车传动系毕业论文

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1、 I 摘摘 要要 汽车传动系主要由发动机、离合器、变速器、传动轴和驱动桥等部分组成。安全 行驶是汽车最需要保证的性能，为确保汽车的安全行驶，需要对汽车传动系零部件的 冲击性能指标进行全面检测。因此设计汽车传动系冲击性能实验台有重要的意义，该 实验台能够全面、准确地测试传动系总成零件的耐冲击性及其相关特性，确保了汽车 的安全性。 为了确定影响汽车传动系扭转冲击载荷的主要因素， 在试验中要首先对汽车传动 系的载荷进行分析，本文主要讨论两种工况，一种是坡路起步为代表的工况，该工况 下离合器突然结合传动系，造成冲击；一种是紧急刹车为代表的工况，该工况下离合 器在没有分离离合器的情况下进行紧急刹车，冲击

2、性也很大。 深入研究实验台主要进行的测试工作的基础上，通过分析实验台工作时的动作， 选择适合的控制系统。本文采用工控机+数据采集卡+可编程控制器联合控制的方式 进行控制与监测。工控机是上位机，可编程控制器是下位机，实现对实验台的准确控 制。 建立了控制系统模型， 采用模糊参数自整定 PID 控制算法进行控制。 仿真分析表 明，该设计方法相对于传统的 PID 方法，稳态精度高响应速度快，鲁棒性较好。应用 NI 软件设计了检测系统，实验结果表明该设计完全满足实验台的使用。 关键词关键词：传动系；冲击性能实验台；控制系统；PID 控制；LabVIEW II Abstract Automobile p

3、ower train is one of the most important component of automobile dynamic transmission automobile power-transmission systems，which includes engine、 clutch、transmission、transmission shaft and drive axle. In order to ensure the security of automobile driving, testing of the impacting drivability perform

4、ance index of automobile power train components is quite important. The automobile power train impacting performance test rig durability is the test equipment to test power train performance, which can test the impacting performance and relative characteristic of power train components comprehensive

5、ly and exactly，which provide security for the driver and improve product quality for manufacturers. In order to stimulate the real conditions of automotive power train, firstly powertrain load characteristics were analyzed. Confirm the main factors affecting the impact of vehicle power train suddenl

6、y started running the jointing conditions of the clutch and the clutch is not an emergency braking torque. Through the test-bed to simulate the working conditions and the of power train structure analysis, to determine the mechanical structure of the principle, and test control system components required to control work piece.The controlling and testing system control the test rig by personal computer analying with data collection board and program logical controller. PC is as host computer, a