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UPB Scientific Bulletin, Series C: Electrical engineering and Computer Science 2015年第3 3期77 77卷 17-30页

作者： Guţʇ, Sergiu-Adrian Dumitrache, Ioan Dept. of Automatic Control and System Engineering University POLITEHNICA of Bucharest Romania Automatic Control and System Engineering Department Automatic Control and Computers Faculty University POLITEHNICA of Bucharest Romania

Currently there is no reliable mechanism available to allow continuous monitoring of all process conditions and leather characteristics inside the closed reactors during leather processing, so no real control. Conditions inside the reactors can only be monitored by stopping the reactor to sample the solution and leather. The automation systems for leather industry rely on stale centralised architecture, a critical point of failure imposing operational bottleneck. To improve the efficiency of leather manufacturing process the paper proposes a multi-agent system (MAS) architecture that is fault tolerant, and that provides high flexibility and agility needed by the turbulent environment of leather industry.

关键词： Multi agent systems

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Reconfiguration architecture for updates of automation systems during operation

Reconfiguration architecture for updates of automation syste...

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Rafael Priego Daniel Schütz Birgit Vogel-Heuser Marga Marcos Dept. of Automatic Control and System Engineering ETSI Bilbao Basque Country University (UPV/EHU) Spain Technische Universitat Munchen Munchen Bayern DE

In recent years automation systems have been required to provide characteristics of flexibility and efficiency in order to cope with the fast changes of the market and consumer demands. To deal with these requirements, the industry has started to implement reconfiguration techniques in order to allow the automation system to reschedule the production, recover from faulty situations and to update the controller at run time, among others. Previous works of authors have been aimed at a model-based definition of the plant components and operations, related to a product. Additionally, automatic code generation has been proposed to obtain an optimal control sequence. This paper extends these previous works with an architecture that generates and updates the software architecture of a Programmable Logic controller during runtime, in response to changes on the plant layout, the product to be manufactured or the control hardware.

关键词： Load modeling Computer architecture Automation Planning Unified modeling language Production Software

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A model-based approach for achieving available automation systems 19

A model-based approach for achieving available automation sy...

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19th IFAC World Congress on International Federation of automatic control, IFAC 2014

作者： Priego, R. Armentia, A. Orive, D. Estévez, E. Marcos, M. University of the Basque Country Department of System Engineering and Automatics Bilbao48013 Spain Universidad de Jaén Dept. of Electronics and Automatic Control Jaen Spain

ISBN: (纸本)9783902823625

Nowadays automation systems are required to be flexible in order to cope with the ever changing requirements of the applications in terms of complexity, extensibility or dynamism. The use of reconfiguration techniques helps to meet these demanding requirements, but at the same time increase the complexity of the systems. This paper presents a supervisor architecture that allows maintaining the availability of a control system in spite of failures such as a node crash, by means of reconfigurations at the control level. To do this, the advantages that Model-Driven Development technology provides have been explored. © IFAC.

关键词： Automation

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On Applying MDE for Generating Reconfigurable Automation systems

On Applying MDE for Generating Reconfigurable Automation Sys...

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International Conference on Industrial Informatics

作者： Rafael Priego Aintzane Armentia Elisabet Estévéz Marga Marcos Dept. of Automatic Control and System Engineering ETSI Bilbao Basque Country University (UPV/EHU) Bilbao Spain Dept. Ingenieria Electrónica y Automática EPS de Jaén University of Jaén Jaén Spain

ISBN: (纸本)9781479966509

The continuous changes on the market and customer demands have forced modern automation systems to provide more strict Quality of Service (QoS) requirements such as load balance or full availability of the control system, among other characteristics. In order to cope with these demanding requirements, modern automation systems have started to incorporate novel design approaches which include reconfiguration mechanisms. Following this trend, this paper presents the use of MDE techniques and technologies, to help in the definition of the control system of reconfigurable automation plants. Directly from the model-based design, a model-based tool is derived that provides support for the generation of the elements that compose the reconfigurable control system.

关键词： MDE Availability Automation system Mechatronic components

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A Model-based Approach for Achieving Available Automation systems

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IFAC Proceedings Volumes 2014年第3期47卷 3438-3443页

作者： R. Priego A. Armentia D. Orive E. Estévez M. Marcos University of the Basque Country Department of System Engineering and Automatics Bilbao 48013 Spain Universidad de Jaén Dept. Of Electronics and Automatic Control Jaen Spain

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Indirect position estimation method for switched reluctance motor using searching windings

Indirect position estimation method for switched reluctance ...

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International Conference on Electrical Machines and systems (ICEMS)

作者： Cheng Wang Zhiquan Deng Jun Cai Rongguang Hu College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing China School of Information and Control Nanjing University of Information Science and Technology Nanjing China Dept. Automatic Control and System Engineering University of Sheffield UK

This paper presents a new method to estimate rotor position indirectly for 12/8 switched reluctance motor (SRM). In this method, searching windings and main windings are wound on stator together. The structure of searching windings is designed to reduce induced voltages caused by main windings. High frequency voltage is applied to searching windings and the position signal is derived from induced high frequency signals. High frequency voltage can be injected from standstill to high speed in this method, thus it can operate in a wide speed range. The proposed method is implemented on a 12/8 SRM and the experimental results demonstrate the validity of this method.

关键词： Windings Reluctance motors Rotors Inductance Estimation Coils

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The enterprise of future as a cyber-physical system

The enterprise of future as a cyber-physical system

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7th IFAC Conference on Manufacturing Modelling, Management, and control, MIM 2013

作者： Dumitrache, Ioan Caramihai, Simona Iuliana University Politehnica of Bucharest Automatic Control and System Engineering Dept. 060042 Bucharest Romania University Politehnica of Bucharest Control Engineering and Applied Informatics Dept. 060042 Bucharest Romania

ISBN: (纸本)9783902823359

The paper presents a conceptual model of the manufacturing enterprise of the future, which is centered on knowledge. It is introduced the concept of organizational wisdom, as an intelligence level that allows manufacturing enterprise to take sustainable decisions. Cyber-Physical systems concept is the most promising approach to implement the knowledge/wisdom model of the enterprise. © IFAC.

关键词： Knowledge based systems

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The Enterprise of Future as a Cyber-Physical system

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IFAC Proceedings Volumes 2013年第9期46卷 1310-1315页

作者： Ioan Dumitrache Simona Iuliana Caramihai University POLITEHNICA of Bucharest Automatic Control and System Engineering Dept. 060042 Bucharest Romania (Tel: +40-21-4029167 University POLITEHNICA of Bucharest Control Engineering and Applied Informatics Dept. 060042 Bucharest Romania (Tel: +40-21-4029616

关键词： Architectures and models for intelligent manufacturing systems intelligent knowledge-based systems

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A reliability model for web services: From the consumers' perspective

A reliability model for web services: From the consumers' pe...

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2011 International Conference on Computer Science and Service system, CSSS 2011

作者： Zhao, Shi Lu, Xiaoming Zhou, Xianzhong Zhang, Tie Xue, Jianqiang Dept. of Control and System Engineering Nanjing University Nanjing China North Automatic Control Technique Institute Taiyuan China

ISBN: (纸本)9781424497638

This paper proposes a model to quantify the reliability of web services. Based on their structures, web services can be classified into the following two kinds: atomic web service which calls no other web services and composite web service consisting of atomic web services. The model first evaluates the reliability of atomic web services from the consumers' perspective. After that this paper points out redundancy is a very effective approach to improve the reliability of composite web services. Then the reliability issue of composite web services is discussed. A method of computing the aggregating reliability of composite web services is introduced using the structure information with the assumption that the reliabilities of atomic web services in the composite web services are available. © 2011 IEEE.

关键词： Redundancy

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Securing JPEG architecture based on enhanced chaotic hill cipher algorithm

Securing JPEG architecture based on enhanced chaotic hill ci...

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2011 International Conference on Computer engineering and systems, ICCES'2011

作者： Hamissa, Ghada Sarhan, Amany Abdelkader, Hatem Fahmy, Mahmoud Electrical Engineering Dept. Faculty of Engineering KFS University Kafr-Elsheikh Egypt Computer and Automatic Control Dept. Faculty of Engineering Tanta University Tanta Egypt Information System Dept. Faculty of Comp. and Info. Menoufia University Menoufia Egypt

ISBN: (纸本)9781457701283

In the last two decades, Chaos theory has received a great deal of attention from the cryptographic community. This paper presents two ideas. First idea is using chaotic functions to overcome the weaknesses of the classical Hill cipher. The second idea is proposing a new encoder-decoder architecture, called ChaoEncoDeco, for securing JPEG images. An extra stage of encryption is embedded within the traditional JPEG codec to improve security level of such system. This security stage uses one of the chaotic functions called Logistic Map. This map is used to enhance the Hill cipher and achieve more secure encryption key. The properties of both chaotic system and of the Hill cipher encryption key are all utilized to obtain ultimate secure systems. The proposed encryption algorithm is crypto-analyzed and compared to the standard Hill cipher algorithm. Complete evaluation for the proposed architecture is also performed which indicates the effectiveness of the proposed system. © 2011 IEEE.

关键词： Cryptography

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