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建立了适应我国中小型企业发展柔性制造系统的分层分布式控制体系结构 ;同时提出了FMS分层分布式控制系统的建模方法。为了使控制系统中各功能实体具有局部自治能力 ,建立了CORBA基础的FMS分层分布式控制软件结构模型和通用报文传输模型。在遵循CORBA规范的Orbix2 .3c平台和VC6 .0的编程环境下 ,开发了FMS控制系统软件 ,并在无锡职业技术学院的FMS中得到验证 相似文献
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本文通过用IDEF1X方法对集成制造系统中的柔性制造单元一级的分布式CAM数据库系统进行了概念模式设计,并用ORACLE系统在三个节点的分布式得以实现.该系统可为单元级的管理、控制、作业调度仿真等提供分布式数据管理功能.文中讨论了实体间的联系、数据分布方案和ORACLE(V7.0)支持的数据定义和分布式功能. 相似文献
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介绍火电机组基于分布式控制系统的发电厂电气监控系统在DCS控制中的应用.该系统采用分布式技术,节点之间的通信采用相互独立的原则,数据实时传送到上位机,通信协议简单,完善和提高了电气系统的运行监控能力和水平,达到完全集控运行的能力. 相似文献
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为了实现高速、高精度的多轴激光切割系统,本文提出了一种激光切割机分布式控制的控制方案。利用恒进给速度的时间插补算法实现了切割运动轨迹的压缩数据生成。利用嵌入式芯片和伺服电机搭建了二轴运动平台的硬件环境。为了实现分布式系统的实时性,利用UDP网络传输快速性特点进行网络传输,并用嵌入式芯片内部的存储空间实现了数据的缓冲,确保了在网络阻塞情况下切割运动的连续性。为了满足分布式系统数据的可靠性要求,应用改进的UDP数据包格式,实现了以太网数据可靠传输。应用实例证明了分布式控制系统运动平台运动平稳、可靠,分布式激光切割系统的实用性强。 相似文献
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FMS的分层分布式控制系统建模研究 总被引:1,自引:1,他引:1
建立了适应我国中小型企业发展柔性制造系统的分层分布式控制体系结构;同时提出了FMS分层分布式控制系统的建模方法。为了使控制系统中各功能实体具有局部自治能力,建立了CORBA基础的FMS分层分布式控制软件结构模型和通用报文传输模型。在遵循CORBA规范的OIrbix 2.3c平台和VC6.0的编程环境下,开发了FMS控制系统软件,并在无锡职业技术学院的FMS中得到验证。 相似文献
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移动环境下产品数据一致性控制技术研究 总被引:2,自引:0,他引:2
为解决可移动系统在移动环境中不能进行产品数据实时更新所带来的产品数据一致性问题,提出了一种新的基于日志的产品数据乐观复制方法,采用分布式数据存储机制,定义了数据和日志的记录方式.该方法可以使用相对较小的通讯和存储开销,更有效地支持移动环境下可移动系统中数据更新和产品数据一致性控制问题.通过在某大型注塑机企业"HTMC产品数据管理系统"中的应用,证明了该方法的实用性和有效性. 相似文献
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由于分布式环境下挖掘全局序列模式常常产生过多候选序列,加大了网络通信代价.为此提出一种基于分布式环境下的全局序列模式快速挖掘算法.该算法将各站点得到的局部序列模式压缩到一种语法序列树上,避免了重复的序列前缀传输;基于合并树中节点序列规则和简单的特点,提出一种项扩展和序列扩展剪枝策略,有效地约减了候选序列,减少了网络传输量,从而快速生成全局序列模式.理论和实验表明,在大数据集环境下该算法性能优越,能够有效地挖掘全局序列模式. 相似文献
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In this work, a robust control methodology is presented for saturating systems with packet dropouts under distributed model predictive control framework. The sequence of time instants when data dropout happens is modeled by a Markov chain. A packet dropout compensation strategy and an augmented Markov jump linear model are considered simultaneously. To design distributed model predictive controllers, the entire system is decomposed into coupled subsystems. Considering the influences of neighbor subsystems, a distributed predictive control synthesis involving packet dropouts and Markovian probabilities is developed by minimizing the worst-case performance index at each time instant. The input saturation constraints are also incorporated into the robust controller design under distributed model predictive control framework. Furthermore, both the recursive feasibility of the proposed robust control under distributed model predictive control and the closed-loop mean-square stability are proved. To show the effectiveness, the proposed methodology is validated by simulations on a continuous stirred tank reactor process and a DC control system. 相似文献
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开放式集散控制--GDUTAA系统的研究,是以μXL中小型集散控制为基础,通过μXL的操作站与上位PC机相连接,使得我们既能充分利用μXL原有的各种,又能利用上位PC机进一步开发各种新的控制算法,如:神经网络、智能控制、专家系统等,并在μXL上加以实施,为我们研究新的控制理论和控制算法提供了一个开放式的实验平台,同时为拥有μXL系统的各工矿企业提供了一个技术更新的方向。 相似文献
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《Measurement》2014
This study uses ZigBee wireless sensor network technology to build a distributed energy monitoring and management research system. A network of nodes can immediately capture the energy of the state in order to collect and analyze information through ZigBee wireless devices transmitting to a central system network server host. With an improved Particle Swarm Optimization (IPSO) approach to data integration optimization calculations, the results of this study will allow the construction of a distributed energy network monitoring system to obtain the optimal solution. The results developed in this study can be applied to energy management, environmental management, information management, plant monitoring, renewable energy management and other fields. In addition to emphasizing the GIO embedded system design techniques for automating energy management, this paper also notes the importance of building distributed nodes using ZigBee technology and energy management system control for addressing such situations as factory fires, theft and energy management security monitoring systems development. 相似文献
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J. Cecil S. Davidson A. Muthaiyan 《The International Journal of Advanced Manufacturing Technology》2006,27(5-6):619-624
Manufacturing organizations worldwide are re-inventing their product development practices in an effort to satisfy changing
customer requirements. In the context of these changes influencing the manufacturing community, there is a need to develop
frameworks, architectures, and methods to facilitate the creation, implementation, and functioning of virtual enterprises
(VEs). This paper presents an Internet-based framework, which supports distributed process planning activities in the context
of a VE. Typically, in a VE, the enterprise partners are distributed, and possess diverse skills and heterogeneous software
resources, which employ heterogeneous computing platforms. Using the developed approach, physically distributed product development
partners can collaborate virtually via the Internet and integrate their life-cycle product development activities through
seamless information exchange. In this framework, the distributed manufacturing resources communicate with each other via
the Internet inter-ORB protocol (IIOP) using an object request broker (ORB) at each distributed site. 相似文献
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A. Protogeros E. Ball M. Stevens 《The International Journal of Advanced Manufacturing Technology》1990,5(4):307-320
This paper presents a distributed printed-circuit-board (PCB) manufacturing control system using UNIX computers connected
to a MAP local-area network. The requirements and methodology for data distribution and control are illustrated in the context
of the PCB production environment, and the implementation issues of tool-operator communication, error-recovery techniques
and shopfloor real-time data feedback are discussed. The interfacing of the system with a production scheduler and a CAD manufacturing
workstation is also investigated. 相似文献
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基于规则的分布式电驱动车辆驱动系统失效控制 总被引:7,自引:0,他引:7
针对分布式电驱动车辆在进入失效控制工况下,传统控制策略存在的纵横向控制目标无法满足、驱动能力降低、安全性变差等缺点,设计并考虑动力性和稳定性的驱动系统失效协调控制策略。该策略利用分布式电驱动车辆各轮无机械连接、各轮独立驱动以及驱动单元冗余配置的结构特点,依据不同的失效状况和车辆状态制定基于规则的驱动系统失效控制算法。对所设计的算法进行实车试验验证,试验结果表明,在发生驱动系统失效后,所设计的基于规则的驱动失效控制策略通过协调控制各驱动轮驱动能力,在低速小转向阶段改善了车辆的纵向驱动能力,在高速或者大转向阶段保证了车辆的横向稳定性。 相似文献
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