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AVOIDANCE OF URBAN VEHICLE TRAFFIC CONGESTIONS

IFAC Proceedings Volumes 2006年第12期39卷 503-508页

作者： Tiberiu S. Letia Dept. of Automation Technical University of Cluj-Napoca C. Daicoviciu St. 15 Cluj-Napoca RO 400020 Romania Tel. +40-264-438282 Fax +40-264-594921

The increase of vehicle traffic in agglomerated urban areas often leads to congestions that decrease significantly the system performances. The intersection signal traffic controllers cannot improve themselves the system throughput when the congestions appear. Therefore a coordination of distributed control components is necessary. The proposed distributed algorithm is based on multiagent system that uses dynamic prices for the vehicle streams to find the cycle splits that avoid the traffic congestions.

关键词： Traffic control distributed control real-time control adaptive control coordination distributed computer control systems

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Design of robust shipboard power automation systems

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ANNUAL REVIEWS IN control 2005年第2期29卷 261-272页

作者： Zivi, E USN Acad Weapons & Syst Engn Dept Annapolis MD 21402 USA

Emergent power and automation technologies provide new opportunities and challenges for multi-disciplinary ship design. In particular, these dynamically interdependent systems require dependable, fault-tolerant control to efficiently manage limited resources and to respond to casualty conditions. Design of an electric warship engineering and damage control system of systems is considered as an illustrative example. In this context, cost and survivability can be considered as either deterministic or probabilistic independent variables. In the stochastic formulation, design robustness is defined with respect to uncertainties including technology readiness, mission creep, and operational environment. (c) 2005 Elsevier Ltd. All rights reserved.

关键词： automation systems design ship control robust performance marine systems distributed computer control systems

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control FUNCTIONS DEVELOPMENT FOR distributed AUTOMATION systems USING THE TORERO APPROACH

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IFAC Proceedings Volumes 2005年第1期38卷 188-193页

作者： Luca Ferrarini Carlo Veber Christian Schwab Marcus Tangermann Aggeliki Prayati Politecnico di Milano Dip.di Elettronica e Informazione P.zza L. da Vinci 32 20133 Milano Italy University of Magdeburg Center Distributed Systems CVS@IAF Universitaetsplatz 2 39106 Magdeburg Germany University of Patras Dept. of Electrical & Computer Engineering Campus of Rio 26500 Patras Greece

The paper presents the design and implementation of an innovative Integrated Development Environment, developed within the on-going European Research Project TORERO, to model and design reusable distributed control systems (DCS). This project proposes an architecture which relies on a development environment based on the Eclipse tool and the emerging standard IEC 61499 and on a suitable control device where a portion of the distributed control application can be executed on a specially developed runtime environment.

关键词： distributed computer control systems Standards Functional Blocks control System Design Methodology Industry Automation

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SMART OBJECTS AND SERVICES MODELING IN THE SUPPLY CHAIN

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IFAC Proceedings Volumes 2005年第1期38卷 25-30页

作者： Eddy Bajic Aldo Cea Research Center for Automatic Control – CRAN – CNRS UMR 7039 University Henri Poincaré Nancy BP 239 54506 Vandoeuvre-les-Nancy France

As management has developed throughout the years, the production and logistic processes have changed dramatically toward a product centric approach. Consequently, new capacities are expected for the products in their informational, sensory and decisional interactions with processes, information systems, operators and users. This article presents an approach that aims to transform a product into intelligent product or smart object. In the methodological solution and in the study case, product and data are upgraded to intelligent object and services, providing a high level of functional interactions in networked and ambient services architecture based on the RFID and UPnP technologies.

关键词： Information technology Automation Architectures computer communication networks distributed computer control systems Warehouse automation

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Static Task Allocation in Real-time distributed computer control systems

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IFAC Proceedings Volumes 2001年第22期34卷 533-538页

作者： J.C.B. Leite J.R.A. Torreāo O.G. Loques A.M. Barroso Instituto de Computação Universidade Federal Fluminense Rua Passo da Pátria 156 - CEP 24210-240 - Niterói - Brazil

The task allocation problem consists in defining a space and time sharing of system resources that can meet all logical and operational constraints of the tasks being considered. For real-time tasks with predictable behavior (periodic), static allocation provides a reliable way to meet temporal scheduling requirements, together with other operational constraints, such as task replication for fault-tolerance. Unfortunately, finding an optimal feasible allocation is known to be NP-hard, and thus heuristic approaches have been proposed. In this paper, the use of a new heuristic to generate static allocations for critical periodic tasks in real-time distributed control systems is described.

关键词： distributed computer control systems real-time systems scheduling algorithms heuristic search real-time operating systems

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Fast Broadcasting with Byzantine Faults

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IFAC Proceedings Volumes 2004年第5期37卷 287-292页

作者： Michel Paquette Andrzej Pelc Département d'informatique et d'ingénierie Université du Québec en Outaouais Hull Québec J8X 3X7 Canada.

We construct and analyze a fast broadcasting algorithm working in the presence of Byzantine component faults. Such faults are particularly difficult to deal with, as faulty components may behave arbitrarily (even maliciously) as transmitters, by either blocking, rerouting, or altering transmitted messages in a way most detrimental to the broadcasting process. We assume that links and nodes of a communication network are subject to Byzantine failures, and that faults are distributed randomly and independently, with link failure probability p and node failure probability q, these parameters satisfying the inequality (1- p 2 )(1- q ) > 1/2. A broadcasting algorithm, working in an n -node network, is called almost safe if the probability of its correctness is at least 1-1/ n , for sufficiently large n . Thus the robustness of the algorithm grows with the size of the network. Our main result is the design and analysis of an almost safe broadcasting algorithm working in time O (log 2 n ) and using O ( n log n ) messages in n-node networks. The novelty of our algorithm is that it can cope with the most difficult type of faults, potentially affecting all components of the network (both its links and nodes), and that it is simultaneously robust and efficient.

关键词： fault tolerance binary tree architectures communication networks distributed computer control systems noisy channels optimality probabilistic models

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E07: Simulation and analysing data transfer in programmable system with distrubuted inputs and outputs

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IFAC Proceedings Volumes 2004年第20期37卷 484-489页

作者： Dariusz Choinski Institute of Automatic Control Silesian University of Technology ul. Akademicka 16 44-100 Gliwice Poland

The paper deals with simulation and analysis tools of control system with distributed inputs and outputs based on TCP/IP and UDP/IP protocols. These protocols are not strictly prepared for industrial control applications. Mostly for improving timedelay ability of communication, TCP/IP protocol is changed by UDP/IP. These protocols have different buffering of data which can cause dead-lock. It is very important to have the ability to simulate network behaviors that depends on real time data transfer and buffer capacity. Methodology of dataflow models for systems simulation and analysis are often used. Model of the simultaneously working processors executing independent tasks may be used for simulation of the wide range of systems with parallel processes structure.

关键词： distributed computer control systems Data flow analysis Communication protocols

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Open Service Architectures for Environmental Monitoring and Industrial Automation

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IFAC Proceedings Volumes 2004年第7期37卷 23-28页

作者： Seppo Sierla Jukka Peltola Kari Koskinen Teemu Tommila Helsinki University of Technology Information and Computer Systems in Automation P.O. Box 5500 FIN-02015 HUT Finland VTT Industrial Systems Production Systems P.O. Box 1301 FIN-02044 VTT Finland

This paper discusses globally distributed telematics applications in the environmental monitoring and industrial automation application areas. The requirements on the necessary distributed computing infrastructure are described. Based on these requirements, the usefulness of component-based software architectures and open service architectures is discussed, and the applicability of the Open ServicesGateway initiative (OSGi) in these applications is evaluated.

关键词： Communication environments Communication systems distributed computer control systems Remote control Telematics

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Industrial Applications of the Agent-Based Technology

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IFAC Proceedings Volumes 2004年第4期37卷 383-397页

作者： Vladimír Mařík Gerstner Laboratory Czech Technical University Prague Czech Republic & Rockwell Automation Research Center Prague Czech Republic

The paper is aimed at summarizing the current state-of-the-art in development of the agent-based solutions in three areas connected with industrial production, namely in holonic control, production management and virtual enterprises. It is shown how the results in these three sub-areas converge and that the agent-oriented technology could provide a good background for developing a unifying approach. Two industrial applications of agent-based systems are described in more details. Both the positive and negative aspects of applying the agent-based solutions in industry are discussed.

关键词： Agents distributed artificial intelligence distributed computer control systems intelligent manufacturing systems simulation industrial control industrial production systems system integration system architecture

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Design of robust shipboard power automation systems

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IFAC Proceedings Volumes 2004年第10期37卷 53-64页

作者： Edwin Zivi United Statues Naval Academy

Emergent power and automation technologies provide new opportunities and challenges for multidisciplinary ship design. In particular, these dynamically interdependent systems require dependable, fault tolerant control to efficiently manage limited resources and to respond to casualty conditions. Design of an electric warship engineering and damage control system of systems is considered as an illustrative example. In this context, cost and survivability can be considered as either deterministic or probabilistic independent variables. In the stochastic formulation, design robustness is defined with respect to uncertainties including technology readiness, mission creep and operational environment.

关键词： Automation systems design Ship control Robust performance Marine systems distributed computer control systems

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