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COMMUNICATION REQUIREMENTS OF A distributed computer control-system

IEE PROCEEDINGS-E computerS AND DIGITAL TECHNIQUES 1981年第1期128卷 21-34页

作者： PRINCE, SM SLOMAN, MS Department of Computing & Control Imperial College London UK

The paper gives a tutorial exposition and discussion of the requirements that a distributed computer control system imposes on its internal communication system, and of the various ways in which this requirement can be met. The subject is considered under the following main headings: informationtransfer requirements, performance, reliability, environmental and safety considerations, physical configuration, and communication-system management. In a concluding Section the requirements of these communication systems and other serial communication systems are compared.

关键词： information-transfer requirements control engineering computing computer networks distributed processing safety internal communication system computer networks and techniques reliability performance communication-system management process computer control distributed computer control system

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Design of a mixed distributed computer control system

Design of a mixed distributed computer control system

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4th World Congress on Intelligent control and Automation

作者： Yang, QY Shi, R Xian Jiaotong Univ Dept Automat Control Xian Shaanxi Peoples R China

ISBN: (纸本)0780372689

In the field of industrial automation, fieldbus is changing the traditional DCS's important position and the architecture of distributed computer control system. However, it is not the time that fieldbus is popularized widely in China because of the factors of economy, technology and industrial automatic level. Therefore, this paper presents a mixed distributed computer control system that is composed of fieldbus and RS485 communication protocol. Through fieldbus and RS485, process parameters and status information of field devices are delivered to monitoring computer. In addition, the information integration between control system and management system is achieved using ODBC technology. This system has already been implemented on the product line in one large-scale tobacco group successfully. The performance results show that the system exerts the advantages of both Fieldbus and traditional data bus adequately, and has many advantages, such as openness, reliability and high ratio of capability-to-price.

关键词： industrial control distributed control controller area networks field buses transport protocols computerised monitoring mixed distributed computer control system design industrial automation distributed computer control system fieldbus RS485 communication protocol system openness reliability capability-to-price ratio

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The system Integration of distributed computer control system for the Hot Strip Mill

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IFAC Proceedings Volumes 1998年第23期31卷 93-98页

作者： Sun Yikang National Rolling Technology Engineering Researching Center University of Science and Technology Beijing

In order to satisfy the Requirement of the Fast control Cycle and Fast Communication between controllers for the Hot Strip Mill, we accept the Fiber-Optic Reflective Memory Net to connect all the controllers in one Area to compose the “Area controller Group” structure in the Basic Automation Level. The MASIC-2000 D had been used in Lai-Wu and Cheng-De Hot Strip Mill, it will be used in the 1700mm Hot Strip Mill of An-Shan Iron & Steel Corp.

关键词： system Integration distributed computer control system

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Architectural Considerations of distributed computer control systems

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IFAC Proceedings Volumes 1981年第1期14卷 41-48页

作者： Jin Lan Department of Computer Engineering and Science Tsinghua University Beijing The People's Republic of China

A generalized concept of parallelism in computer architecture is summarized and adopted as a common thread linking different categories of multiple-computer systems. Resource replication, time-overlapping and resource sharing are three ways in which parallelism may be realized. From the architectural point of view, a distributed computer control system is considered as the combination of these three forms of parallelism with its hierarchical system structure analyzed in different partitions. Several useful architectures with this property are proposed.

关键词： distributed computer control system computer architecture distributed processing parallel processing multiple-computer system multiprocessing system

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DICOS: a real-time distributed industrial control system for embedded applications

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control ENGINEERING PRACTICE 2001年第4期9卷 439-447页

作者： Campelo, JC Yuste, P Gil, PJ Serrano, JJ Univ Politecn Valencia Dept Comp Engn Fault Tolerant Syst Grp Valencia 46022 Spain

The Fault-tolerant systems Research Group of the Technical University of Valencia has developed the distributed industrial central system (DICOS) system. This paper describes DICOS nodes. The architecture of DICOS nodes and the error detection mechanisms used are presented. These mechanisms are based on the internal capabilities of the 16-bit microcontroller used and control flow checking and deadlines control with the aid of a second 8-bit microcontroller. Experimental results about the effectiveness of those mechanisms are shown in this paper. (C) 2001 Elsevier Science Ltd. All rights reserved.

关键词： embedded system distributed computer control system reliability safety deadline fault tolerance

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SFC++:: a tool for developing distributed real-time control software

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MICROPROCESSORS AND MICROsystemS 1999年第2期23卷 75-84页

作者： Martínez, XCP García, RF Univ A Coruna Dep Elect & Sistemas La Coruna 15011 Spain

This paper describes a visual tool for developing real-time control software for distributed industrial systems. The aim of this project currently in progress, is to obtain a visual programming environment which integrates both the advantages of object-oriented modelling for the design and simulation of systems and the power of modern distributed control systems (i.e. computers with real-time operating systems interconnected by means of industrial real-time networks). To bridge the gap between the object-oriented system model and the implementation level, at which we have multiple parallel tasks running on a network, sequential function charts (SFCs) are used as a standard formalism [12,16] for the description of system dynamics and control software programming. (C) 1999 Elsevier Science B.V. All rights reserved.

关键词： distributed computer control system object-oriented tool real-time system sequential function chart visual programming tool

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SUPERVISORY system FOR BATCH PROCESS

SUPERVISORY SYSTEM FOR BATCH PROCESS

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INTERNATIONAL CONF ON ADVANCES IN INSTRUMENTATION AND control ( ISA 90 )

作者： SUMI, T MORIMOTO, M BRANCHE, K Ryouka-Techno Engineering & Constraction Co. Fukuoka Japan

ISBN: (纸本)1556172702

This paper introduces a new Supervisory system for multi-products Batch process, providing basic functions for CIM construction. This system was released in April, 1990. This system communicates with DCS/PLC and constructs real-time-driven-database typically for batch processes and enables easy recognition, by the operational, the productional and the administrative personnel, the actual status of operation and production. It enhances easy quality control and early adjustment of operation if deviation from the original plan occurs during actual production. Furthermore, this system is able to support planning of production schedule and stock control, and ensures stable productivity of the plant, helping in adding higher value to the product.

关键词： CHEMICAL INDUSTRY control ENGINEERING computer APPLICATIONS BATCH PROCESS distributed computer control system

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Applications of a distributed computer system for Batch Process

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IFAC Proceedings Volumes 1981年第2期14卷 2881-2886页

作者： N. Ohashi T. Itoh Engineering Division Mitsubishikasei Techno-engineering Ltd. 2-1-30 Shiba Minatoku Tokyo Japan Engineering Department Mitsubishi Chemical Industries Ltd. (Kurosaki Works) Kurosaki Yahata Nishi Ku Kita Kyushu Fukuoka Prefecture Japan

Conventional analog instruments fail to achieve a satisfactory automatic control system for an automated batch system in which transient states are encountered and frequent alterations of type and/or grade vary the nature of the operations. The authors obtained even better results than expected by employing a distributed computer system in batch control. This paper presents the related hard-and software details together with an outline description of the type and/or grade control system, improved controlability, countermeasures against erroneous operations, and results given by the new system.

关键词： Centralised plant control chemical industry control engineering computer applications digital computer application direct digital control distributed computer control system batch process control process control

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A large token-ring control network for the cern lep and SPS accelerators and collider rings

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IFAC Proceedings Volumes 1987年第14期20卷 159-164页

作者： R. Rausch European Organization for Nuclear Research (CERN) SPS Division CH-1211 Geneva 23 Switzerland

The CERN Large Electron Positron (LEP) collider ring under construction and the existing Super Proton Synchrotron (SPS) accelerator will both be operated from the same main control room over a new control network implementing the token-ring protocol in conformity to the IEEE 802.2 and 802.5 standards. To cover the circumference of the LEP and SPS accelerator rings and the long distances (up to 4.6 kms) between geographically distributed control areas an unconventional transmission method has been implemented and successfully tested with the contribution of the IBM Zürich Research Laboratories. The LEP/SPS control network, consisting of several token-rings, inter-connected by bridges, and of gateways to the present SPS multi-star network and to the CERN computer centre, will be described as well as the network reconfiguration and diagnostic facilities.

关键词： Multi-microprocessor distributed computer control system real-time control network token-ring protocol time-division multiplex network management network reconfiguration

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distributed Versus Centralized computer control systems of Industrial Continuous Process

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IFAC Proceedings Volumes 1981年第1期14卷 27-34页

作者： M.A. Cuenod SGI-IC Geneva Switzerland

3 “waves” can be recognized in the development of the automation of industrial processes:. - analog control loops and feed backs - direct digital control (DDC) through a centralized computer - decentralized control with the help of micro-processors and micro-computers Some aspects and advantages of the new trends of the control technology are presented taking as example the cement and power industries. In conclusion it will be shown that if the final aim of the centralized DDC was to replace the operators, the purpose of these new trends is: - to assist them and give them more efficient tools - to berter inform them about the process - to improve their judgement and ability to supervise and manage the process.

关键词： distributed computer control system electrical power plant control cement plant control man-machine communication process computer application

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