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International Conference on Computer as a Tool (EUROCON 2005)

作者： Samaranayake, L Leksell, M Vijayananda, T Alahakoon, S Royal Inst Technol Dept Elect Engn Div Elect Machines & Power Elect S-10044 Stockholm Sweden

ISBN: (纸本)142440049X

Ethernet today is the most widely used information carrier and the service provider for many important applications in the routine life such as e-mail, voice-image data and web based information. It is also emerging strongly into the area of industrial communication covering even sensors and actuators at the factory floor level. However, obtaining network connectivity for existing machinery is still an open question on which many research interests are being focused. This paper presents the hardware development of a general purpose Ethernet Ready Sensor Actuator (ERSA) module and its usage in closing the speed control loop of a Brushless DC motor over a standard Switched Ethernet network. The module is subsequently used to compare connection oriented TCP with connectionless UDP for the same distributed control Application under constant network traffic but at different sampling rates.

关键词： actuator brushless DC motor distributed control system ethernet sensor

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Security and safety assurance architecture: Model and implementation (supporting multiple levels of criticality)

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6th International Conference on Algorithms and Architectures for Parallel Processing

作者： Li, ZW Xiamen Univ Informat Sci & Technol Coll Xiamen 361005 Peoples R China UESTC Zhongshan Inst Zhongshan City GuangDong Prov Peoples R China

ISBN: (纸本)3540292357

A combined architecture is described to protect the system against malicious attacks as well as unplanned system failures. Discussions are laid on its characteristics, structure, safety assurance technologies. Safety kernel (shell) and integrity policy for criticality are used to ensure the system safety. Furthermore, to implement rules of integrity policy, the reflective technology based on metaobject is adopted and how to apply reflective technology to implement these rules is analyzed in details. Finally, an experiment illuminates the feasibility of the proposed architecture.

关键词： distributed control system safety kernel security and safety assurance architecture integrity policy for critically

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Software reconfigurable signal diagnosis in embedded CAN networked systems

Software reconfigurable signal diagnosis in embedded CAN net...

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9th International Conference on Intelligent Engineering systems

作者： Fodor, D Univ Veszprem Fac Informat Technol Dept Automat H-8201 Veszprem Hungary

ISBN: (纸本)0780394747

The paper presents two developing approaches of a controller Area Network signal analyzing tool. The tool enables signal test/diagnose facility for Electronic control Unit's within a controller Area Network based communication network without PC (i.e.: vehicle, automated manufacturing line, distributed motor control application). The tool is based on a simple and inexpensive target hardware, and is easily reconfigurable and extendable for different applications. The program has been tested for automotive application.

关键词： ECU microcontroller CAN controller Area Network test diagnose distributed control system signal analyzing embedded programming

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The deadlock protection method used in the production systems

The deadlock protection method used in the production system...

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8th International Conference on Advances in Materials and Processing Technologies/13th International Conference on Achievements in Mechanical and Materials Engineering

作者： Krenczyk, D Dobrzanska-Danikiewicz, A Silesian Tech Univ Dept Engn Proc Automat & Integrated Mfg Syst PL-44100 Gliwice Poland

The subject matter of that paper is the deadlock protection method. The proposed method enables to the sequential ordering of the processes realisation to prevent the system from the occurrence of the cycle of mutual expectations being one of the conditions necessary for the deadlock occurrence. The deadlock may take place only in the systems with the closed structure at the resources belonging to the basic cycle. The basic cycles are found using the procedures adopted from Graph Theory. It is possible because a graph is a model that enables description of a production system structure. The graph elementary contour is adequate to the basic cycle occurring in the production system structure. Thus, the identification of the basic cycle occurring in the production system structure requires identification of the elementary contour in the graph. For the elementary contour search the contour search algorithm is used. (c) 2005 Elsevier B.V. All rights reserved.

关键词： distributed control system deadlock graph contour contour search algorithm

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A distributed process control system based on multi-agent

A distributed process control system based on multi-agent

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2nd International Symposium on Instrumentation Science and Technology (ISIST 2002)

作者： Zhang, JM Wang, SQ Zhejiang Univ Natl Key Lab Ind Control Technol Hangzhou 310027 Zhejiang Prov Peoples R China

ISBN: (纸本)7560317685

In modern process industry, the control theory met several new problems such as distribution, robustness and flexibility, island automation, higher performance requirements and the like, which are very difficult for traditional control method. To solve those problems, this paper gives a brief review of the process control and multi-agent theory in process control, and proposes a new design method of intelligent control system based on multi-agent theory. The presented control system includes four kinds of unit agent with the respective terms actuate agent, coordinate agent, manage agent and user agent corresponding to the process industrial enterprise organization. It is open, distributed and flexible, and can be implemented with the developing internet/intranet technology. This is a new approach for solving the problem of island automation. Finally, several key problems and the research fields that will be met in the following investigation are given.

关键词： intelligent control system distributed control system process control multi-agent

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Application of intelligent control

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Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument 2005年第SUPPL.期26卷 887-889页

作者： Zhuang, Chunhua Sun, Chongzheng Wang, Pu Zhang, Yating Beijing University of Technology Beijing 100022 China

Up to now, there is the complete blank in the field of evaluation of full grain catalyzer in minitype evaluation in China. According to the condition of the evaluation system, it gives a control algorithm based on cascade control, and outside gives fuzzy control algorithm, inside gives PID control algorithm. Then the control precision can be improved and it is easy to realize in DCS system. This algorithm does not depend on the precision math model of undercontrolled object. It not only improves the control precision of system but also overcomes the effect to the stability of control system brought by time-delay. Then this algorithm solves the difficulty in the normal control algorithm such as the need of precise math model, difficulty to stable.

关键词： Cascade control distributed control system Fuzzy control

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A DCS In-the-loop Simulator for a Power Plant

A DCS In-the-loop Simulator for a Power Plant

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Asian Simulation Conference/The 6th International conference on system Simulation and Scientific Computing

作者： GOU Xiaolong, YANG Chen, TANG Shengli, WANG Guangjun (College of Power Engineering, Chongqing University of China, Chongqing, China 400044)

A power plant simulator with the basic hardware and software of distributed control system (DCS) is proposed in this paper. By this simulator, the operators and the control engineers of power plant can be trained, and the analyzing work for practical power plant control system can be completed. In this simulator, the simulation software and the DCS software are combined by the network communications, the module model method and the alterable step arithmetic are used to ensure the real time characteristic in training mode, and improve the precision in analyzing mode. The steady running process of this system proves its usability.

关键词： thermodynamics system simulation distributed control system DCS in the loop mathematical model configuration

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Spanwise response variation for partial-span gurney-type flaps

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AIAA JOURNAL 2004年第8期42卷 1640-1643页

作者： Solovitz, SA Eaton, JK Stanford Univ Dept Mech Engn Stanford CA 94305 USA

Uninhabited air vehicles with high-aspect-ratio wings can experience substantial aeroelastic modes, which can adversely affect performance. An active, distributed control system is being developed to alleviate these vibrations, using a series of small span trailing-edge actuators to alter the aerodynamic loads at specific spanwise locations. Particle image velocimetry was used to determine the spanwise effects of these devices because it is necessary to understand whether their application will have nonlocal effects. The wake structure indicates that the primary influence is confined to within two actuator spans of the applied device, demonstrating that the response is quite localized.

关键词： Trailing Edges Particle Image Velocimetry Aerodynamic Loads High Aspect Ratio Actuators Air Vehicle distributed control system Aeroelastic Modes Strouhal Number Lift Coefficient

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Mapping of IEC 61499 function blocks to automation protocols within the TORERO approach

Mapping of IEC 61499 function blocks to automation protocols...

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2nd IEEE International Conference on Industrial Informatics

作者： Schwab, C Tangermann, M Lüder, A Kalogeras, A Ferrarini, L Univ Magdeburg Ctr Distributed Syst D-39106 Magdeburg Germany

ISBN: (纸本)0780385136

The design of distributed control systems (DCS) contains three major parts: the programming of the control application code of the DCS, the functional allocation of the control application code to the specific devices that the DCS consists of, and the mapping of the distributed control application code to the underlying communication platform depending on the distribution. This paper presents an approach for the mapping of event triggered IEC 61499 Function Blocks to the underlying automation protocols, whereas time triggered and event triggered automation protocols will be considered. This work is part of the research project TORERO, which is funded by the European Commission under the IST program.

关键词： industrial automation distributed control system IEC 61499 communication protocols time triggered event triggered

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SCS: A workflow_based smart control system

SCS: A workflow_based smart control system

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2nd IEEE International Workshop on Electronic Design, Test and Applications

作者： Fang, ZY Li, SH Xu, WG Meng, QK Jilin Univ Sch Comp Sci & Technol Changchun 130012 Peoples R China

ISBN: (纸本)0769520812

Workflow technology is directly objected to the application of industry and business. distributed control system (DCS) is the combination of computer technology, communication technology, CRT technology and control technology. In this paper, we will introduce the design and implementation of a workflow based distributed control system on PC network, SCS-Smart control system, which can provide several useful functionalities.

关键词： workflow distributed control system real-time database PC network

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