毕业设计（论文）-基于PLC剥线机控制系统设计.doc

摘要 随着PLC技术和控制自控理论的迅速发展，具有通用性强、控制程序可变、编程简单、扩展能力强、体积小、重量轻、功耗低、维护方便等很多优势的PLC控制技术，得到了愈来愈广泛应用。 本文一个新的角度来看待PLC控制系统，探索PLC控制系统在实际方面的应用，完成如下三项工作: （1）阐述PLC控制技术是如何经历漫长的过程产生、如何能迅速发展起来、国内外对PLC控制技术的应用现状以及和其他控制技术的对比有哪些方面比较突出优势，介绍了剥线机控制系统背景、国内外研究现状、研究意义。 （2）探讨了PLC控制系统设计相对一般方法。从PLC控制系统的组成、工作原理分析入手，重点分析PLC控制系统硬件设计和软件设计的步骤和方法。 （3）完成基于PLC剥线机控制系统设计，包括系统总体设计、硬件设计和软件设计。在本系统的总体设计中包含计算步进电机的脉冲方面的内容、利用阶梯型曲线对步进电机进行加速与减速控制以及剥线机工作方式；硬件方面设计分析PLC输入编码（为节省PLC输入端子）PLC设备如何选择、I/O的如何分配、绘制PLC接线图等内容；软件的设计内容主要包括以下几个方面首先是对于PLC程序方面的设计，其中包括主程序、功能按键模块、三段剥皮功能模块、二段剥皮功能模块、、数字按键输入模块等。 关键词: PLC;剥线机;步进电机;控制系统 Abstract With he development of automatic control theory and PLC technology, PLC technology, which has the advantages of commonality, changeable control program, programmed easily, strong expansion capacity, small capacity, light weight, power saving and maintenance friendly ,has been used widely. This article, which is set in the strip machine control system of PLC, will discuss the usage of this technology from the angle of its control system. Finish the following tasks: （1） Generally describe the produce, its development ,the use between domestic and abroad and the advantages compared with other control system.. Introduce the origin of strip machine control system technology, the background, the situation of study both in domestic and abroad. and the study significance. （2）Do research the method of control system of PLC technology. Analyze the method and the process of hard ware system and soft ware design in PLC control system through the analysis of the composition and operating principle of PLC control system. （3）Finish the design of the strip machine control system on base of PLC control system ,including the overall system design hardware design and software design. The overall system design include the counting principle of stepping motor pulse, the control method of using Stepped-weir speed curve to control the accelerated and decelerated motion of stepping motor. It also include the manners of wor