amt离合器起步控制策略分析word格式论文.docxVIP

AMT 离合器起步控制策略研究 摘 要电控机械式自动变速器（Automated Mechanical Transmission，AMT）是一种适 合我国国情的自动变速器。目前，装有 AMT 变速器的车辆越来越多，但是国内 AMT 的产业化还有很多关键技术需要解决，离合器的起步接合控制就是其中之一，针对该 问题进行研究，对我国汽车行业的自主创新及关键技术的掌握有着重要意义。论文研究内容主要包括：（1）分析研究了膜片弹簧离合器的结构与工作原理，明确了传动片、从动盘轴 向变形量、波纹弹簧等对膜片弹簧离合器载荷变形特性曲线的影响规律，建立了压紧 力与分离轴承行程关系的数学模型以及离合器扭矩传递模型。（2）搭建了车辆传动系统仿真模型，针对起步工况，分析了驾驶员、车辆和行 驶环境之间的关系及其对离合器、变速器的影响，研究了离合器的工作状态，明确了 离合器接合控制最主要的评价指标，冲击度和滑磨功。（3）设计了起步接合过程双层模糊控制器，第一层控制器推理驾驶员起步意图， 第二层控制器推理分离轴承接合速度。最后，完成了对控制效果的验证。仿真结果表 明，控制器较准确地反映了驾驶员的起步意图，且将车辆冲击度和离合器滑磨功控制 在了合理范围内。（4）采用 Freescale MC9S12DG128 单片机作为主控芯片，完成了对 AMT 电控 系统软硬件的初步设计。关键词：AMT，离合器，Matlab/Simulink，SimDriveline，模糊控制RESEARCH ON THE CONTROL STRATEGIES OF AMT’s CLUTCH ENGAGEMENT AT VEHICLE STARTABSTRACTAutomated Mechanical Transmission is suitable for China national conditions. More and more vehicles equipped with AMT transmission. However, there are many key technologies need to be resolved in domestic AMT industry. The control strategies of AMT’s clutch engagement at vehicle start is one of problems that need to solve urgently. Research in this filed has important significance of independent innovation of the Automobile Industry in China.The paper researched mainly includes:Firstly, analysis of the structure and working principle of the diaphragm spring clutch. Clarify leaf spring, axial deformation of the diaphragm spring and its influence on the load deformation characteristic curve. The mathematical model of relationship between press force and release stroke is set up, also the model of clutch torque delivery.Secondly, for vehicle starting conditions, analysis of the relationship between the driver, the vehicle and the traveling environment and its influence on the clutch and transmission. Two indices, jeck and friction work, are confirmed to be most important in evaluation of the clutch control at vehicle starting through the analysis of clutch engagement.Thirdly, a double layers fuzzy controller is designed for the clutch engagement process. The first layer of