计算机前馈-反馈控制系统的设计

根据系统工艺要求及实际需要,本文给出以远程数据采集模块作为信息交换桥梁,运用组态软件开发用户应用软件,设计出了流量液位计算机前馈-反馈复合控制系统,着重说明了远程数据采集模块在设计开发流量液位计算机前馈-反馈复合控制系统中的应用。实际运行结果表明,前馈-反馈复合控制系统对可测量的外部扰动具有及时补偿的能力,具有一定的实际应用价值。     

基于CAN总线的发动机转速遥控控制技术

介绍了一种基于CAN总线的电喷发动机转速遥控控制的实现方法。对遥控发动机转速进行了分析,对控制系统的组成、软件设计流程和主调节模块分别作了介绍,以特种运输机械为例,结合主机要求进行遥控控制设计。实际应用表明,该方法能实时、安全、有效地控制发动机的转速,满足了特种作业机械的作业要求。     

基于DS444总线协议的吊具控制系统构建

用户因为互换性的要求,对采购上海振华重工(集团)股份有限公司的吊具提出特殊要求。为了满足用户的要求,根据当时市场上所能采购到的控制产品,构建该项目的吊具控制系统。文中介绍如何在硬件和软件上构建该吊具控制系统,以满足用户的要求。     

基于PLC的自动装配机控制系统的设计与实现

针对所速自动装配机的结构和功能要求,设计了一种基于PLC的自动装配机控制系统,详细介绍了系统的硬件结构和PLC地址分配情况,重点阐述了控制软件的开发过程及部分控制程序设计要点与内容,最后对自动装配机远程监控功能的实现,作了简要介绍.该自动装配机控制系统结构简单,可靠性高,显著提高了生产效率和产品品质,具有较高的实用价值.     

新型单反射面紧缩场数控馈源支架系统

针对传统单反射面紧缩场固定式馈源支架固有的定位调节困难、馈源极化人工切换等问题,基于馈源定位原则进行了馈源支架的机械结构和定位调整机构的设计,并做了轻量化处理,创新地实现了馈源绕其喇叭轴线高精度旋转功能,完成了数控馈源支架控制系统和远程控制软件的研制。这种新型的数控馈源支架已成功应用于某单反射面紧缩场中,各项指标均满足设计使用要求。     

一种基于3G网络的分布式远程无线测控系统的设计

3G网络是新兴的无线公共的移动传输网络,具有传输速度高、覆盖范围广的特点.该文提出一种基于3G网络的远程无线测控系统的设计方案,利用3G路由器和串口上网模块将远程的现场测控终端连接至INTERNET中具有静态IP的上位机,通过TCP协议实现上位机与测控终端的无线、高速、透明数据传输.介绍系统的2个关键设备:3G路由器和...     

OPC技术及组态软件在远程监控和维护中的应用

介绍了一种基于OPC和组态软件技术相结合的远程监控系统，设计了一种符合OPC标准的低成本远程组态监控方法。系统通过OPC技术和网络技术的融合实现了符合标准OPC接口的远程转移工具，同时通过组态软件实现远程组态监控和维护，从而为远程监控开辟了一个新的途径。     

工业废气远程监测系统的设计与实现

工业废气的排放是否达到国家环保局的要求,需要实施远程监测和控制。介绍一种基于AT89S8252单片机的工业废气远程监测系统的基本结构,提出了采用上、下位拓扑结构,通信采用物理链路PSTN形式来实现远程监测、检测的方案。详细介绍了该系统硬件和软件的实现方法。该系统监测功能强,操作简单、自动化程度高,维护方便。     

矿用空压机智能联控及故障诊断预警系统研究

为了满足矿山的生产要求和实现空压机的节能降耗,以上位机组态软件为开发平台,采用可编程序控制器PLC为控制核心,设计了一套集远程控制和故障诊断预警于一身的空压机智能控制系统。对空压机的智能联控、故障诊断以及故障报警死区等关键性技术进行了研究和开发设计,实现了对空压机的远程集中控制、故障报警和设备故障诊断功能,提高了矿山生产的安全性和可靠性,降低了能源和成本消耗。     

A web service-based multi-disciplinary collaborative simulation platform for complicated product development

In a ubiquitous computing environment, computer-aided engineering (CAE) software packages can be encapsulated as a service and be accessible through networks, which is essential to small and medium enterprises (SMEs) for complex product design with limited computing resources. In this paper, a web service-based platform for the multi-disciplinary collaborative simulation (MDCSS) is proposed, which is a software-sharing environment. In MDCSS, although the CAE software packages reside in their remote application program servers, they are registered in the service center to be accessible according to the computing requests. Given the increasing CAE services with the same function, a quality of service (QoS)-aware scheduling method with real-time and countable parameters is proposed to adaptively select the most efficient web service among alternatives. Through an additional layer and an application broker for service scheduling, MDCSS allows allocating services automatically, keeping load balance, and minimizing human intervention. This platform is reusable, scalable, and efficient for implementation, which enables the end user to invoke the remote CAE software ubiquitously in a “pay-as-you-use” fashion.     

基于LabVIEW的旋转机械远程故障诊断系统研制

根据机组运行特点和现场要求,针对旋转机械,特别是电厂风机,设计并开发出了一套在线监测与远程故障诊断系统。通过对设备进行在线监测,可以实时掌握其运行状态及变化趋势,为实现机组的高效运行、状态判断和故障分析提供依据和保障。该系统以LabVIEW作为软件开发平台,同时采纳了神经网络故障诊断方法,界面友好,功能完善。     

基于WebAccess的精密球研磨网络控制系统设计

针对精密球研磨控制中存在的上研磨盘压力控制实时性、精度要求高,下研磨盘速度协调控制较难同步,及精密球生产过程中存在的网络远程控制等问题和要求,采用模糊控制算法实现上研磨盘压力控制,通过MODBUS总线方式实施下研磨盘内外转速的协调控制,选用基于B/S网络结构的组态软件WebAccess进行有效的网络远程控制.实际运行证明,系统性能稳定,控制效率和精度得到了显著提高,达到了用户要求.     

基于单片机的乒乓球发球机设计

研究设计了一种由红外遥控器控制的智能型乒乓球发球机,并对该发球机装置进行了软、硬件设计.该装置以C8051单片机作为其控制核心,可实现由遥控器控制供球的快慢、发球的力度、发球的高度及角度,也可模拟人工发球原理,实现随机发球.研究结果表明,该发球机设计结构简单,使用方便,可满足不同的用户需求.     

烟条外观检测主控系统设计

主要研究了烟条外观检测系统硬件和软件的设计方法以及系统的扩展性问题.阐述了以uPSD3254A型单片机为控制核心的硬件电路设计原理,基于C语言的模块化编程思路.在系统的扩展性方面,使用ZigBee模块组网,并通过GPRS实现远程控制.现场应用结果表明,系统满足设计要求,具有很高的安全性和可靠性.     

Developing a location–inventory model under fuzzy environment

Process analytical technology encourages the industry to adopt innovative technologies to increase quality. The key components of this approach are better understanding the product manufacturing process, data analysis, process analytical tools, process monitoring, and continuous feedback during the manufacturing process. Remote process analytical technology over public IP networks can significantly reduce the cost of maintenances and technical support, and simplify the classical OPC-like architecture based on multiple server gateways. The requirements for using remote process analytical technology for high-speed processes are mainly concerned with cyber security and high data refresh rate on the remote monitoring machine. This work intends to evaluate a new, open application protocol named CyberOPC dedicated to CNC machines. The CyberOPC version presented in this paper supersedes the first version presented in previous papers, which had no streaming features. The CyberOPC technology is not only an open alternative to other data exchange protocols, but it also introduces streaming capabilities to gain high refresh rate on remote control stations. It is based on the Client/Server Model, where a software layer is introduced between CNC and the remote monitoring station, on the Server side of CyberOPC. Even if the case study adopts a tunneling Schema that includes server gateways, the requirements to develop protocols in embedded devices and modern CNC are fulfilled by several devices that include a TCP/IP stack.     

基于单片机的红外遥控定时开关装置的设计

设计了一种红外遥控定时开关装置,该装置具有友好的显示界面,可以对普通开关设定20组定时开、关时间,具有红外遥控,键盘双向控制和掉电保护等功能。测试结果表明,此定时开关灵敏性高、稳定、功耗低,很好的满足了系统功能的各项要求。     

智能输液监控系统的设计

针对传统人工液监控系统控制精度低、人力物力耗费大、安全度不够等缺点,本研究提出了一种基于ZigBee技术、光电检测技术与电机控制技术的输液监控系统的设计方法。考虑到对输液滴速控制的可靠性与精确性,采用PID控制算法进行液滴速度的闭环精确控制。实验证明,系统工作稳定,实现了输液过程中的远程监控功能,达到了对液滴速度的控制要求。     

基于红外传感器的焊接环境有害气体监测系统

针对焊接环境有害气体浓度监测的需要,以DSP为控制核心,利用红外吸收原理设计了气体浓度监测系统,同时介绍了系统设计方案,阐述了红外传感器工作原理,分析了硬件和软件系统设计.该系统实现了实时显示、声光报警、远程通信等功能,具有精度高、响应快、性能稳定、抗干扰能力强等特点,具有良好的应用前景.     

FZ-10C型反力式滚筒制动试验台远程检测系统的设计

为了加强汽车综合性能检测站的信息化管理,根椐有关要求首先对FZ-10C型欧式粘砂反力式滚筒制动试验台进行了计算机测控方面的升级改造试验。然后从FZ-10C型反力式滚筒制动试验台的制动原理、数据采集以及制动台与上位机之间的数据通信和制动检测软件的开发等方面进行了系统论述。最后对远程检测系统进行了试验论证。结果表明该设计方案基本上是成功的。该设计方法对于提高汽车综合性能检测站的服务水平具有一定的参考意义。     

CNC-implemented fault diagnosis and web-based remote services

Recently, the conventional controller of machine-tool has been increasingly replaced by the PC-based open architecture controller, which is independent of the CNC vendor and on which it is possible to implement user-defined application programs. This paper proposes CNC-implemented fault diagnosis and web-based remote services for machine-tool with open architecture CNC. The faults of CNC machine-tool are defined as the operational faults occupied by over 70% of all faults. The operational faults are unpredictable as they occur without any warning. Two diagnostic models, the switching function and the step switching function, were proposed in order to diagnose faults efficiently. The faults were automatically diagnosed through the fault diagnosis system using the two diagnostic models. A suitable interface environment between CNC and developed application modules was constructed for the internal function of CNC. In addition, a suitable web environment was constructed for remote services. The web service functions, such as remote monitoring and remote control, were implemented, and their operability was tested through the web. The results obtained through this research could be a model of fault diagnosis and remote servicing for machine-tool with open architecture CNC.