急急急 毕业论文范文一万字

建议看看下面的资料网，在这里想要谁给现写一篇，可能不会有，因为这里没人会为了这个区花费一些时间去写的，所以根据我搜集的一些网站来看，希望对你有所帮助，用心去做，不管毕业论文还是平时作业吗，我相信你都可以做好的。毕业论文以及毕业设计的，推荐一个网 http://www.wendangtianxia.com 这个网站的论文都是以words的形式原封不动的打包上传的，网上搜索不到的.

写作资料也很多，下面给你一些范文资料网：
百万范文网： http://www.jiaoyuda.com 分类很细 栏目很多

毕业论文网： http://www.wendangtianxia.com
引文数据库： http://www.zazhijie.cn
社科类论文： http://www.ggykf.com
经济类论文： http://www.nanbeiqiao.com
论文之家： http://www.91qikan.com
范文网：www.fanwen.com

如果你是校园网，那就恭喜你了，期刊网里面很多资料
中国知网： http://www.cnki.net
龙源数据库： http://www.qikan.com
万方数据库： http://www.wanfangdata.com
优秀论文杂志 http://www.interpapers.com/kj/
论文资料网 http://www.51paper.net/[
法律图书馆 http://www.law-lib.com/z
法学论文资料库 http://www.law-lib.com/lw/
中国总经理网论文集 http://www.cnceo.com/school/
职业经理人论坛 http://mba.001.com.cn/mbamba.htm
财经学位论文下载中心 http://www.forumcn.com/sblw/
公开发表论文_深圳证券交易所 http://www.sse.orgs.cn/sse/yjkw/

中国路桥资讯网论文资料中心 http://www.lqzx.com/lunwen.htm
论文商务中心 http://doc.cei.gov.cn
法律帝国： http://www.fl365.com/gb/lawthinker/bbs/default.as
学术论文 http://wwwd.hrfexam.com/advanced1.htm
论文统计 http://www.sdci.com.cn;
北京大学学位论文样本收藏f http://www.lib.pku.edu.cn

汽车电子ABS系统的仿真与研究 摘要 汽车的行驶安全性是汽车工业关注的焦点之一，防抱制动系统（ABS，Anti- lock Braking System）作为一种性能优良的主动安全装置可大大降低交通事故的发 生率。欧美等国家都将其作为汽车的标准配置，而我国ABS的研究工作才刚起 步。我国的ABS检验主要依靠装车道路试验，需要耗费大量财力、人力与时间， 缺乏高效、准确的室内检测手段。因此找到一条快速、节约的研究ABS的开发方 法，对汽车工业有着非常重要的现实意义。 本课题通过研究汽车动力学模型，搭建了汽车防抱死制动系统的仿真实验平 台，在ABS仿真实验平台上，通过试验验证ABS控制软硬件的正确性。 课题通过对汽车动力学的研究分析，采用MATLAB7.0仿真软件搭建了汽车仿 真研究的数学模型，包括简化的单轮车辆系统模型、轮胎模型和制动器模型。系统 模型输出的轮速信号，通过DDE方式实现仿真数据传输，利用PCI数据采集板卡 作为仿真计算机系统与ABS控制器（ECU）的通讯接口。由于仿真实验平台要模 拟实际轮速传感器输出的正弦波信号，根据DDS原理，利用VB软件开发的 ActiveX控件，开发了可变频正弦波形发生器，使仿真实验平台输出信号为频率与 轮速成正比的正弦波。 根据现有条件，利用计算机组态王软件搭建了ABS控制器（ECU）软环境， 实现ABS ECU硬件的功能。选取逻辑门限值算法为ECU的控制算法，通过逻辑 关键词：防抱制动系统；仿真；汽车动力学；MATLAB；计算机2 Abstract The driving safety becomes the focus of Automobile Industry,Anti-lock Braking System(ABS)as a fine performance of active Safety Device can decrease traffic accident as much as possible.ABS is the standard equipment of automobile parts in American and many countrys of Europe,but the research on ABS is at the starting stage in China.The inspection of ABS mainly depends on the road experiment which needs much money, model output signal is Wheel Speed,and efficient method of data exchange based DDE.The system using data acquisition card PCI transmit data with the ECU of the real car.the high-speed.The simulation experiment platform output signal is sine wave signal which frequency is proportional to wheel speed. Putting up ECU soft environment by KingView software according to the existing conditions.Selection of the Logic Gate Control as control algorithm of ECU.Through analysis and comparison,judgment the wheel status,then output relevant control instruction which is a signal return to the simulation experiment platform of ABS.It is realize simulation for ABS ECU at the close-loop testing platform. According to the simulation results from the ABS simulation experiment platform,it showed correct and credible of this system.Routine braking and anti-lock braking were compared in different results,and the results between simulation test with road test for ABS,thus analyzed the main factors which influence the system,then modify the ratated parameters and so on for the ABS simulation experiment platform. Key Words：Anti-lock Braking System;Simulation;Vehicle dynamics;MATLAB; Computer1 目录 摘要...............................................................................................................................................1 ABSTRACT..........................................................................................................................................2 1课题研究综述...................................................................................................................................1 1.5课题研究的内容和特点...........................................................................................................8 2汽车电子ABS原理.........................................................................................................................9 2.1 ABS的主要装置.......................................................................................................................9 2.1.1速度传感器.....................................................................................................................10 2.1.2电子控制器.....................................................................................................................12 2.1.3压力调节器.....................................................................................................................12 2.2 ABS控制原理.........................................................................................................................14 2.2.1防抱死控制的基本原理................................................................................................14 2.2.2防抱死控制的控制机理................................................................................................16 2.4 ABS控制性能的评价方法....................................................................................................22 2.4.5各种评价方法的比较 3动态仿真建模方法.........................................................................................................................24 3.1搭建仿真平台的意义.............................................................................................................24 3.2系统模型搭建.........................................................................................................................242 3.2.1系统建模方法.................................................................................................................24 3.2.2 ABS建立数学模型的方法............................................................................................26 3.3 MATLAB软件平台................................................................................................................26 3.3.1 MATLAB介绍................................................................................................................26 3.3.2集成的系统设计环境....................................................................................................27 3.3.3 SIMULINK动态系统模型............................................................................................27 3.3.4 SIMULINK进行车辆动力学系统建模的优点...........................................................28 3.4 MATLAB外部接口方式.......................................................................................................28 3.4.1 MATLAB数据采集工具箱...........................................................................................29 3.4.2 MATLAB COM（组件对象模型）组件.....................................................................29 3.4.3 MATLAB MEX文件.....................................................................................................30 3.4.4 MATLAB与Excel接口................................................................................................31 3.5.1脚本式M文件及其调用...............................................................................................35 3.5.2函数M文件及其调用...................................................................................................35 4 DDS技术实现变频正弦信号........................................................................................................37 4.1直接数字合成（DDS）介绍................................................................................................37 4.1.1 DDS的基本原理.............................................................................................................37 4.1.2 DDS的基本结构.............................................................................................................39 4.1.3相位累加器.....................................................................................................................40 4.1.4正弦查询表.....................................................................................................................41 4.1.7 DDS的优点及局限性....................................................................................................42 4.2基于DDS技术的正弦波形发生器设计..............................................................................44 4.2.1正弦查询表.....................................................................................................................44 5汽车ABS仿真实验平台的设计与开发.....................................................................................46 5.1基于汽车电子ABS仿真实验平台的设计思路.................................................................46 5.2汽车ABS系统模型的搭建...................................................................................................48 5.2.1简化的单轮车辆系统子模块........................................................................................49 5.2.2轮胎子模块.....................................................................................................................51 5.3 MATLAB模型输出与硬件接口...........................................................................................54 5.4组态王环境实现仿真结果的传输........................................................................................57 5.4.1组态王中DDE的使用方法..........................................................................................58.............................................................................................58 5.4.3仿真实验平台组态王环境............................................................................................60 5.4.4利用VB创建ActiveX控件.........................................................................................62 5.5 ABS ECU软环境....................................................................................................................63 5.5.1 ECU控制算法选取........................................................................................................64 5.5.2典型的逻辑门限值控制过程........................................................................................64 5.5.3逻辑门限值控制算法相关参数....................................................................................66 5.7课题目前存在的问题.............................................................................................................69 结论..............................................................................................................................................70 参考文献........................................................................................................................................72 致谢.............................................................................................................................................76

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