本科设计闭式功率流变速器试验台控制统设计.docxVIP

本科学生毕业设计闭式功率流变速器试验台控制系统设计The Graduation Design for Bachelors DegreeThe Research of Closed Test Platform’sControlfor Transmission摘 要随着工程车辆工业的迅猛发展，变速箱以其传动比固定，传动力矩大，结构紧凑等优点，成为工程车辆的关键性传动部件之一。齿轮传动效率影响整个工程车辆的动力性，经济性和排放性等。目前，国内外大多将变速箱安装在试验台上进行试验，试验台主要分两种形式，一种是采用开式功率流变速器试验台，它的特点是：结构简单，试验方法简单，通用性好，但是由于需要采用原动机作为驱动电机来驱动，造价高，耗电量大。另外一种是采用闭式功率流变速器试验台，它的特点是：与开式功率流试验台相比可以大大节省动力消耗，这对数量大，周期长，大功率的齿轮传动试验具有巨大的经济效益。本课题以闭式功率流试验台为研究对象，结合其物理结构，实现了试验台的自动控制。本课题的研究方法是在已做出的物理结构及查阅资料的基础上，按照上下位机的结构，上位机为PC机，负责控制模式的选择，参数的设定，及转矩、转速、时间、转向和运算结果的显示。下位机采用C8051F060单片机，负责传感器信号的监测、电机驱动、多路显示等。通过选择合适的单片机，传感器，电动机，变频器完成控制部分的硬件设计，通过Visual Basic程序和单片机程序实现软件的设计，最终实现了实验台的自动控制。关键词：变速箱；闭式功率流；试验台；串行通信；变频器ABSTRACTAlong with the fast development of the vehicle industry, transmission is becoming one of the crucial parts of project vehicles drive train because of its merits such as fixed ratio, t-he big driving moment, compact structure and so on . Gear drive’s efficiency influences the power, efficiency and emission of entire vehicles and so on.At present, transmissions expe-rimentsare mostly carried on test platform both in home and abroad, the test platform can ma- inly divided in two forms, one kind is open text platform which uses the power flowing the gearbox text platform.Its characteristic is: The structure is simple, the testing method is si-mply the nature is good, but because it needs to be derived with the prime electrical machin-erythe construction cost is high, the power consumption is big. The other one kind is called closed text platform which uses the closed power to flowgearbox test platform,. Its charact-eristicis: it can save great power compared with the open text platform , and it has huge economic efficiency to the gear drive experiment with big quantity, long cycle , specially with high efficiency. This topic takes the closed test platform as the object of study, united the design of structural, and realized the movement simulation process of the test platform.This technique of this topic is o