外文文献翻译（译成中文1000字左右）： 在本文中，。PLC的控制优势 任何控制系统从概念到进入工厂工作都要经历四个阶段。 PLC系统在每一个阶段都有优势。 第一阶段是设计，对工厂的需要进行研究和制定控制策略，传统的运行平台的设计和制造必须在设计进行前完成。PLC系统仅仅需要的是一个模糊的关于机器的可能大小的想法和I/O数量的要求（多少输入和输出接口）。在这个阶段输入和输出芯片十分便宜，所以可以内置一个很健全的备用容量，它允许用来补充遗漏项目和为未来的扩充做准备。 其次是设计。传统的方案是，每一项工作都是“一次成型”这不可避免的造成了工程拖延和增加成本。一个的PLC系统使用最简单的标准件螺栓连接在一起。在这样的连接下开始编写 PLC程序（或者至少是写入详细的程序规范）。 知之为知之不知为不知是知也下一阶段是安装，安装是一种繁琐和昂贵的工作，例如安装传感器、执行器、限制开关系统和主机的连接。分布式PLC系统使用串行链路式的预编译，测试界面可以简化安装它带来了巨大的成本优势。PLC的程序多数在这个阶段完成。 最后是调试，而这正是PLC真正的优势被发掘的部分。没有任何设备在第一次就正常工作。人性就是这样，总会有一些疏漏。与传统的系统变动情况的耗时和昂贵相比，PLC的设计师提供了系的内置备用内存容量、备用I/O和一些备用多芯电缆线，多数的变动能迅速和相对便宜的完成。另外一个好处是，所有的变化PLC都有记录，程序的调试和修改不会因为没有被记录而遗失，这是一个经常发生在常规系统中的问题。 还有一个额外的第五阶段，维护，一旦启动工作，并移交生产就产生了维护的问题。所有设备都有缺点，大多数设备在错误的模式中度过了它们的大部分的时间。 PLC系统提供了一个非常强大的工具帮助诊断故障。 随着社会生产不断进步和人们生活节奏不断加快,人们对生产效率也不断提出新要求。由于微电子技术和计算软、硬件技术的迅猛发展和现代控制理论的不断完善,使机械手技术快速发展,其中气动机械手系统由于其介质来源简便以及不污染环境、组件价格低廉、维修方便和系统安全可靠等特点,已渗透到工业领域的各个部门,在工业发展中占有重要地位。本文讲述的气动机械手有气控机械手、XY轴丝杠组、转盘机构、旋转基座等机械部分组成。主要作用是完成机械部件的搬运工作,能放置在各种不同的生产线或物流流水线中,使零件搬运、货物运输更快捷、便利。 一.四轴联动简易机械手的结构及动作过程 机械手结构如下图1所示,有气控机械手(1)、XY轴丝杠组(2)、转盘机构(3)、旋转基座(4)等组成。 图1.机械手结构 其运动控制方式为：(1)由伺服电机驱动可旋转角度为360°的气控机械手(有光电传感器确定起始0点);(2)由步进电机驱动丝杠组件使机械手沿X退休人员返聘工资交个人所得税吗、Y轴移动(有x、y打架的英文轴限位开关);(3)可回旋360°的转盘机构能带动机械手及丝杠组自由旋转(其电气拖动部分由直流电动机、光电编码器、接近开关等组成);(4)旋转基座主要支撑以上3部分;(5)气控机械手的张合由气压控制(充气时机械手抓紧,放气时机械手松开)。 其工作过程为：当货物到达时,机械手系统开始动作;步进电机控制开始向下运动,同时另一路步进电机控制横轴开始向前运动;整理英语伺服电机驱动机械手旋转到达正好抓取货物的方位处,然后充气,机械手夹住货物。 步进电机驱动纵轴上升,另一个步进电机驱动横轴开始向前走;转盘直流电机转动使机械手整体运动,转到货物接收处;步进电机再次驱动纵轴下降,到达指定位置后,气阀放气,机械手松开货物;系统回位准备下一次动作 外文文献 The advantages of PLC control Any control system goes through four stages from conception to a working plant. A PLC system brings advantages at each stage. The first stage is design; the required plant is studied and the control strategies decided. With conventional systems design must be complete before construction can start. With a PLC system all that is needed is a possibly vague idea of the size of the machine and the I/O requirements (how many inputs and outputs). The input and output cards are cheap at this stage, so a healthy spare capacity can be built in to allow for the inevitable omissions and future developments. Next comes construction. With conventional schemes, every job is a ‘one-off’ with inevitable delays and costs. A PLC system is simply bolted together from standard parts. During this time the writing of the PLC program is started (or at least the detailed program specification is written). The next stage is installation, a tedious and expensive business as nsors, actuators, limit switches and operator controls are cabled. A distributed PLC system using rial links and prebuilt and tested desks can simplify installation and bring huge cost benefits. The majority of the PLC program is written at this stage. Finally comes commissioning, and this is where the real advantages are found. No plant ever works first time. Human nature being what it is, there will be some oversights. Changes to conventional systems are time consuming and expensive. Provided the designer of the PLC system has built in spare memory capacity, spare I/O and a few spare cores in multicore cables, most changes can be made quickly and relatively cheaply. An added bonus is that all changes are recorded in the PLC’s program and commissioning modifications do not go unrecorded, as is often the ca in conventional systems. There is an additional fifth stage, maintenance, which starts once the plant is working and is handed over to production. All plants have faults, and most tend to spend the majority of their time in some form of failure mode. A PLC system provides a very powerful tool for assisting with fault diagnosis. Simple Manipulator And The Control Of It Along with the social production progress and people life rhythm is accelerating, people on production efficiency also continuously put forward new requirements. Becau of microelectronics technology and calculation software and hardware technology rapid development and modern control theory, the perfection of the fast development, the robot technology pneumatic manipulator system becau its media sources do not pollute the environment, simple and cheap components, convenient maintenance and system safety and reliability characteristic, has penetrated into every ctor of the industrial field, in the industrial development plays an important role. This article tells of the pneumatic control robots, furious manipulator XY axis screw group, the turntable institutions, rotating mechanical parts ba. Main effect is complete mechanical components handling work, to be placed in different kinds of line or logistics pipeline, make parts handling, transport of goods more quick and convenient. Matters of the manipulator axial linkage simple structure and action process Manipulator structure, as shown in figure 1 below have accud of manipulator (1), XY axis screw group (2), the turntable institutions (3), rotating ba (4), etc. Figure 1 Manipulator Structure Its motion control mode is: (1) can rotate by rvomotor Angle for 360 ° breath control manipulator (photoelectric nsor sure start 0 point); (2) by stepping motor drive screw component make along the X, Y manipulators move (have X, Y axis limit switches); (3) can rotates 360 ° can drive the turntable institutions manipulators and bushings free rotation (its electric drag in part by the dc motivation, photoelectric encoder, clo to switch etc); (4) rotating ba main support above 3 parts; (5) gas control manipulator by pressure control (Zhang clo when presd on, put inflatable robot manipulators loon) when gas. Its working process for: when the goods arrived, manipulator system begins to move; Stepping motor control, while the other start downward motion along the horizontal axis of the stepmotor controller began to move exerci; Servo motor driver arrived just grab goods manipulators rotating the orientation of the place, then inflatable, manipulator clamped goods. Vertical axis stepper motor drive up, the other horizontal axis stepper motor driver started to move forward; rotary DC motor rotation so that the whole robot motion, go to the cargo receiving area; longitudinal axis stepper motor driven down again, arrived at the designated location, Bleed valve, mechanical hand relea the goods; system back to the place ready for the next action. 参考文献： [1] 《电气控制系统与可编程控制器》 机械工业出版社.常晓玲主编 [2] 《检测与转换技术》 机械工业出版社.常健生 [3] 《校庆文章PLC应用开发实用子程序》 人民邮电出版社.贾德胜 [4] 《三菱FX2N系列PLC应用技术》 机械工业出版社.刘建华 [5]《PLC原理与应用》煅龙骨 清华大学出版社.俞国亮 [6] Lozano, R. (Rogelio),．Adaptive control systems[M]．Fresno:Witerwoof Inc.,1999 |
指导教师审阅意见： 指导教师： 年 月 日 |
本文发布于:2023-07-09 05:30:02，感谢您对本站的认可！
本文链接：https://www.wtabcd.cn/fanwen/fan/82/1086776.html
版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系，我们将在24小时内删除。
| 留言与评论（共有 0 条评论） |
