基于PLC的液晶屏上料机电控系统设计及研究

发布时间：2018-04-04 17:21

本文选题：Q系列PLC　切入点：定位模块　出处：《中北大学》2017年硕士论文

【摘要】：近年来随着我国平板显示产业全球市场份额进一步增大,设备配套能力的提升已经成为平板显示产业下一步健康持续发展的关键。北京清大天达光电科技有限公司根据中国大陆行业现状对G4.5液晶屏切割裂片线进行改造。本文作者参与了改造项目,针对上料机电控系统,主要的研究内容如下:开展了硬件设计,以Q系列PLC为控制核心,采用定位模块、伺服驱动器和伺服电机,设计了具有三个自由度的上料机械手的运动控制系统。基于交流伺服控制原理,根据id=0电流控制的矢量控制策略和基于SVPWM算法的PWM调制方式,建立了采用PI调节方式的位置、速度、电流(转矩)三闭环交流伺服系统位置控制模型。Simulink仿真结果表明,设计的伺服系统模型中电机运动响应和位置跟踪性能良好,符合机械手定位控制要求。根据伺服系统模型设置伺服驱动器控制参数,在开机后机械手在PLC内置程序控制下完成上料过程。开展了软件设计,采用PLC结构化编程工具GX Wors2设计了上料机电控系统控制程序,实现了上料机械手的手动、自动上料功能以及对上料过程的控制。采用LabVIEW开发平台设计上位机监控画面,实现了工艺参数的在线设置和读取;采用生产者消费者模式的框架结构编制了伺服电机控制程序,通过Modbus协议与下位机伺服驱动器通信,对电机手动、自动运行参数进行配置,实现了对机械手上料工况的实时监控。结果表明,该上料机人机交互方便快捷。在液晶屏上料机生产制造后,对机械手在X轴方向的定位精度做测试实验,结果表明,机械手在X轴方向平均定位精度和重复定位精度分别达到3.7um/mm和0.7um,符合位置控制要求。
[Abstract]:In recent years, with the further increase of global market share of China's flat-panel display industry, the improvement of equipment supporting capability has become the key to the next healthy and sustainable development of flat-panel display industry.According to the industry situation in mainland China, Beijing Qingda Tianda Optoelectronic Technology Co., Ltd.The main contents of this paper are as follows: hardware design, Q series PLC as the control core, positioning module, servo driver and servo motor,The motion control system of feeding manipulator with three degrees of freedom is designed.Based on the principle of AC servo control, according to the vector control strategy of id=0 current control and the PWM modulation method based on SVPWM algorithm, the position and speed of Pi control mode are established.The simulation results of current (torque) three-closed-loop AC servo system position control model. Simulink simulation results show that the motor motion response and position tracking performance of the designed servo system model is good and meets the requirements of manipulator positioning control.According to the servo system model, the servo driver control parameters are set, and the manipulator completes the feeding process under the control of the PLC built-in program after the start of the machine.The software design is carried out, and the control program of the feeding machine electronic control system is designed by using the PLC structured programming tool GX Wors2. The manual and automatic feeding functions of the feeding manipulator and the control of the feeding process are realized.The monitoring screen of upper computer is designed by using LabVIEW development platform, the on-line setting and reading of process parameters are realized, the servo motor control program is compiled with the frame structure of producer and consumer mode, and the servo driver of lower computer is communicated through Modbus protocol.The manual and automatic operation parameters of the motor are configured to realize the real-time monitoring of the feeding condition of the manipulator.The results show that the machine is convenient and fast.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273

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