基于SOA的设备远程监测与诊断系统体系结构的研究

根据设备网络化远程监测和故障诊断应用的需求,从提高系统的可复用性、可伸缩性和互操作性出发,提出基于面向服务架构(service-oriented architecture,SOA)的分布式远程监测和故障诊断协作模型和企业级远程监测和故障诊断系统架构。在.NET和LabVIEW平台下,利用分布式编程模型(windows communication foundation,WCF)、Web服务等技术开发程序实例,验证了该体系架构的有效性。指出,在设备远程监测和故障诊断系统开发和应用领域中引入SOA概念及其相关技术,将大大提高分布式故障诊断系统的扩展性、伸缩性。     

ACS510变频器的Modbus通信控制

基于ABB公司的Win CS组态软件对PM683控制器进行编程,结合Modbus通信方式,实现对ACS510变频器的远程启动、停止、速度调节控制,以及监测变频器的运行数据。控制器的编程语言采用了FBD功能块。经过试验表明,该方法可实现对变频器的远程操作与监视。     

基于三菱SFC顺序功能图的CIM系统的设计及实现

针对在智能工业区块链技术中必不可缺的CIM系统,为了提高CIM系统设计的效率,并增强其可维护性,基于三菱PLC进行编程,并采用SFC(Sequential Function Chart,顺序功能图)的编程思路,设计开发了一套CIM系统。客户使用结果表明:通过使用SFC编程方式,使CIM系统的设计效率得到显著提高,且该系统具有方便维护的特点。     

基于SFC的电梯PLC模块化程序设计

SFC是PLC的一种编程语言,与传统的梯形图编程方法相比,使用SFC流程图语言来设计PLC控制程序,编程者不用考虑各工序步之间的逻辑关系,而只需要对各个工序步骤进行简单的处理设计就能保证机械正确动作,具有结构直观、编程简单、逻辑性不强、稳定性高等特点而得到广泛应用。以四层智能多功能教学电梯控制过程为例,介绍基于SFC的电梯PLC编程方法。     

PLC的SFC程序设计方法

以实例介绍了用SFC编程的方法 ,介绍了单一流程的SFC和多个流程的SFC。     

加工单元监控系统的设计与实现

通过分析加工单元的顺序动作,绘制了其顺序流程功能图SFC,提出利用SFC编写PLC程序和MCGS脚本程序的方法,最终通过PLC与MCGS之间的通信在人机界面上实现了加工单元顺序动作的精确监控。运行结果证明,加工单元运行动作准确可靠,监控系统既实现了系统运行状态的实时和动态监控,也达到总体设计要求。同时证明利用SFC编写PLC程序和组态脚本程序的方法是行之有效,该方法便于理清编程思路,简化编程难度,增强程序的可读性和交流性,为工业生产的组态仿真设计提供帮助,也对MCGS课程教学具有较强的借鉴意义。     

立式节能抽油机的智能控制系统

为解决我国游梁式抽油机成本高、耗电量大,效率低、调整困难等问题,对比分析了智能控制立式抽油机的优点,将立式抽油机代替游梁式抽油机应用到实际中去。开展了针对立式抽油机的高效率可靠性分析,提出了利用西门子PLC和Micromaster变频器来实现具有自适应变频调速和自动进行故障诊断智能控制系统的方法,该控制系统通过选用西门子PLC作为核心控制器去控制变频器,通过改变电动机的运转频率,实时计算了抽油机应该运行的速度,通过计算上、下冲程的时间,来控制变频器的输出电源的频率和电压。实现了电动机的无级调速控制,并做到了运行转矩的适配。研究结果表明,该节能立式抽油机的智能控制系统具有结构简单、无故障运行寿命长并提供远程监控接口等特点。     

编制顺序功能图的技巧与三种实现方法

在《机电设备电气控制系统安装与维护》的理实一体化课程开发中,学生很容易编制一般顺序控制系统的梯形图,但是顺序控制系统的结构变复杂时,自身调试非常不方便且绝大部分学生理不清内在的逻辑性而不能编制出梯形图,达不到机电设备的自动控制要求。针对上述问题,采用FX系列的PLC编程,结合复杂并行序列结构的顺序控制系统实例,首先详尽阐述了顺序功能图(SFC)的组成、动作过程和绘制顺序功能图的注意事项;然后在顺序功能图的基础上,依次使用SFC功能编程、"启保停电路"编程和置位复位指令编程三种方法对结构复杂的顺序控制系统进行编程,为理实一体化课程开发和提高高职院校教师教学水平提供一定的参考价值。     

基于GSM网络的远程内燃机故障诊断系统

针对传统内燃机现场故障诊断系统操作复杂,对维修人员技术要求较高等缺点,提出一种基于GSM网络的远程故障诊断方法。根据内燃机角振动诊断理论最新成果,利用51单片机技术,基于GSM开发了远程内燃机故障诊断系统,并对其硬件结构、软件流程进行了介绍。系统性能稳定、操作简便,经用户使用效果良好。     

A simulated annealing algorithm for integration of shop floor control strategies in semiconductor wafer fabrication

The semiconductor manufacturing industry is one of the most important industries in Taiwan. Wafer fabrication is an essential process in semiconductor manufacturing. However, controlling the production system on the shop floor is extremely difficult owing to the complicated manufacturing process and reentrant characteristics. In this paper, the shop floor control (SFC) integration strategies (order review/release, dispatching, and rework strategies) in wafer fabrication are considered with using several performances. We reviewed the literature on SFC strategies in wafer fabrication. The proposed combination simulation and simulated annealing (SA) algorithm is presented for SFC strategies in wafer fabrication. The objective was to seek the near global optimum solution for the combination of SFC strategies for a specific performance indicator. From the results, the proposed methodology was found to perform well for combinations of SFC strategies using different performance indicators in wafer fabrication. However, no single combination of SFC strategies could satisfy all performance indicators. Hence, considering the trade-off among these production control strategies, a suitable strategy should be chosen based on the system control tactics. Considerable computational time was saved in this research.     

A formal model for incorporating shop floor controls into plant information systems

The high cost and long development cycle of shop floor controls (SFC) have prevented many small, medium, and even large-size manufacturers from deploying plant-wide, real-time information systems. In order to stay competitive in a make-to-order business model, such systems are essential. In addressing the obstacles to such systems, this article proposes a formal method that ensures that a built SFC can be applicable to a plant-wide, real- time information system. By taking advantage of both the linear growth of the complexity function in a structured adaptive supervisory control model, and the real-time responses of a virtual production line based e-Manufacturing system, a formal method for creating an integration-ready structured adaptive supervisory control model (iSASC) for a discrete manufacturing system is introduced. An iSASC-based SFC prototype system was successfully tested and evaluated in an industrial site.     

APPLICATION OF IMPROVED PRODUCTION ACTIVITY CONTROL ARCHITECTURE FOR SHOP FLOOR INFORMATION SYSTEM IN DIGITAL MANUFACTURING

Shop floor control (SFC) is responsible for the coordination and control of the manufacturing physical and information flow within the shop floor in the manufacturing system. Weaknesses of the production activity control (PAC) architecture of the shop floor are addressed by the Maglica's new system architecture. This architecture gives rise to unlimited number of movers and producers thus evolving more complex but decentralized architecture. Beijing Institute of Technology - production activity control (BIT-PAC) architecture introduces an idea of sub-producers and sub-movers thus reducing the complexity of the architecture. All the equipments including sub-producers and sub-movers are considered to be passive in the proposed shop floor information system. The dissemination of information from sub-producers and sub-movers is done manually through a PC. Proposed BIT-PAC SFC architecture facilitates the information flow from shop floor to the other area of the organization. Effective use of internet information services (IIS) and SQL2000 is done along with the ASP.NET technology to implement the application logic. Applicability of the software based on BIT-PAC architecture is checked by running application software on a network PC that supports the dynamic flow of information from sub-producers and sub-movers to the other parts of the organization. Use of software is also shown at the end for BIT training workshop thus supporting the use of SFC architecture for similar kind of environments.     

Interoperable control [production control]

Focussing on shop floor control for discrete parts cellular manufacturing systems, the author proposes a functional architecture for managing the flow of work through the system in quasi real time. The shop floor control (SFC) system must be flexible, portable and also must support interoperability     

PCS7在电机组行走控制中的应用

针对某轧钢厂预弯系统的工艺及控制要求,运用先进的西门子PCS7及PLC、变频器技术对系统进行了自动化网络及HM I设计。同时运用了PCS7的SFC、CFC编程语言对预弯系统的电机组行走控制进行了技术升级,使系统整体控制精度得到了较好地提升,取得了较好的技术经济效益。     

基于PLC的四自由度机械手控制系统设计

本文通过研制基于PLC控制的四自由度气动光盘搬运机械手,设计相关的气动回路与PLC控制系统,分析了机械手中PLC控制系统的特点。PLC控制系统由于其简单易于实现,可靠性好,是代替继电器控制系统有效的方法。通过对PLC程序设计的研究,采用顺序功能图设计方法是实现气动机械手动作路线及其他复杂顺序动作系统的有效方法。     

基于CPAC的数控转塔冲床系统的开发

介绍了计算机可编程自动化控制器(CPAC)的软硬件结构,分析了该控制器在数控领域的应用特点。提出了数控转塔冲床的结构方案和控制方案,采用"PC+运动控制器"的结构,以HMI为人机界面,IPC为控制系统核心,在windows CE操作系统上,用梯形图和顺序功能图两种开发语言,开发了数控转塔冲床系统。     

模具车间作业控制系统设计

车间作业控制是制造企业MRPⅡ／ERP系统的一个重要组成部分,是MRPⅡ／ERP计划的具体实施环节。以模具生产为例,阐述了一种车间作业控制系统的功能结构和设计方法。     

基于CIMS的车间控制器系统

:车间控制器是计算机集成制造系统实现集成的重要组成部分。以南飞纺机公司CIMS车间控制器的开发过程为背景 ,分析了CIMS环境下的车间控制器的特点和作用 ,确定了它与CIMS其它各部分的信息流通关系     

基于模糊PID算法的远程液位控制系统

针对实时液位控制对象,提出了一套远程控制系统,并结合模糊PID控制算法,介绍了其电路组成和设计原理,实现了对远程液位系统的监视和控制功能.本系统的研究成果是实时控制与无线传输结合的重大进步,实现了远程控制功能,具有广阔的推广应用前景.