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International Workshop on Robot Sensing (ROSE)

作者： Radu-Emil Precup Stefan Preitl Emil M. Petriu Jozsef K. Tar Janos Fodor Department of Automation and Applied Informatics Polytechnic University of Timisoara Romania School of Information Technology and Engineering University of Ottawa Canada Institute of Intelligent Engineering Systems Budapest Technology Polytechnical Institution Hungary

The paper discusses a delta domain approach to the design of Mamdani PI-fuzzy controllers using iterative learning control algorithms. A speed control system for a DC drive servo-drive is implemented and experimental ... 详细信息

关键词： Fuzzy control Control systems Design methodology Sampling methods Discrete transforms Robotics and automation Takagi-Sugeno model Velocity control Cascading style sheets Robust stability

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“Active flux” orientation vector sensorless control of IPMSM

“Active flux” orientation vector sensorless control of IPM...

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International Conference on Optimization of Electrical and Electronic Equipment, OPTIM

作者： Ion Boldea Mihaela Codruta Paicu Gheorghe Daniel Andreescu Frede Blaabjerg Department of Electrical Engineering University of Politehnica Timisoara Timisoara Romania Department of Automation and Applied Informatics University of Politehnica Timisoara Timisoara Romania Institute of Energy Technology University of Aalborg Aalborg Denmark

This paper presents a novel strategy for the vector control of IPMSM, without signal injection. The overall performance of the motion-sensorless control depends strongly on the accuracy of the rotor position and speed estimation. The proposed state observer is based on the concept of the ldquoactive fluxrdquo (or ldquotorque producing fluxrdquo), which ldquoturns all the salient-pole rotor ac machines into nonsalient-pole onesrdquo. As well as giving a detailed explanation of the concept, the paper demonstrates, through a wide range of experimental results, the effectiveness of the active flux observer under half full rated torque operating conditions in 2 rpm-1000 rpm speed range.

关键词： Rotors Stators Observers Torque Estimation Inverters Resistance

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Gain-Scheduling and Iterative Feedback Tuning of PI Controllers for Longitudinal Slip Control

Gain-Scheduling and Iterative Feedback Tuning of PI Controll...

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International Conference on Computational Cybernetics (ICCC)

作者： M.-B. Radac R.-E. Precup S. Preitl J.K. Tar J. Fodor E. M. Petriu Department of Automation and Applied Informatics Polytechnic University of Timisoara Timisoara Romania Institute of Intelligent Engineering Systems Budapest Technology Polytechnical Institution Budapest Hungary School of Information Technology and Engineering University of Ottawa Ottawa Canada

The paper suggests PI controllers for longitudinal slip control in the framework of a laboratory anti-lock braking system (ABS). The new design methods make use of gain-scheduling and iterative feedback tuning. They prove to be relatively simple and transparent thus ensuring low-cost automation solutions. The digital implementation of the controllers is done for the laboratory ABS. Real-time experimental results validate the theoretical approaches.

关键词： Wheels Automatic control Pressure control Linear feedback control systems Laboratories Control systems Acceleration automation Design methodology Friction

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Current harmonic compensation by three-phase converters controlled by space vector modulation

Current harmonic compensation by three-phase converters cont...

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Annual Conference of Industrial Electronics Society

作者： Damien Paire Maurizio Cirrincione Marcello Pucci Rafael K. Jardan Istvan Nagy Abdellatif Miraoui Systems and Transport (SeT) University of Technology of Belfort-Montbéliard (UTBM) Belfort FRANCE I.S.S.I.A.-C.N.R. Institute on Intelligent Systems for the Automation Palermo ITALY Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest HUNGARY

This paper deals with the application of a method developed for the compensation of harmonic currents generated by nonlinear loads, connected to the utility grid, using three phase dc/ac converters. The converters are supplied by renewable power sources, i.e. they are part of a distributed generation system. Nonlinear load current harmonics are compensated by a voltage oriented control (VOC). Current control is performed directly on the grid current so no additional current sensors are needed for ensuring sinusoidal grid current. The proposed method has been verified both by computer simulation and experimentally on a test setup where the control algorithm is implemented in a computer embedded card (dSPACE).

关键词： AC generators DC generators Mesh generation Analog-digital conversion Power supplies Distributed control Voltage control Current control Computer simulation Testing

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Linear and fuzzy control solutions for a laboratory Anti-lock Braking System

Linear and fuzzy control solutions for a laboratory Anti-loc...

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International Symposium on Intelligent Systems and informatics (SISY)

作者： M.-B. Radac R.-E. Precup S. Preitl J.K. Tar E.M. Petriu Department of Automation and Applied Informatics Polytechnic슠University of Timisoara Timisoara Romania Institute of Intelligent Engineering Systems Budapest Tech Polytechnical Institution Budapest Hungary School of Information Technology and Engineering University of Ottawa Ottawa Canada

Three slip controllers are designed and implemented on an anti-lock braking system (ABS), a PI controller, one SISO fuzzy controller without dynamics and a PI-fuzzy one. The system is highly nonlinear. The design approaches are based on system modeling and identification and knowledge from experiments. The controllers are based on the local linearization of the controlled plant and the use of fuzzy control in terms of the modal equivalence principle. The simplicity of design and implementation is highlighted by real-time experiments.

关键词： Fuzzy control Laboratories Wheels Pressure control Control systems Linear feedback control systems Cascading style sheets Acceleration Tires Design engineering

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Trends in Theory of Control System Design Status report prepared by the IFAC Coordinating Committee on Design Methods

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IFAC Proceedings Volumes 2008年第2期41卷 2144-2155页

作者： Ruth Bars Patrizio Colaneri Luc Dugard Frank Allgöwer Anatolii Kleimenov Carsten Scherer Budapest University of Technology and Economics Dept. of Automation and Applied Informatics Hungary Politecnico di Milano Dipartimento di Elettronica e Informazione Italy GIPSA-lab CNRS INP Grenoble France Institute of Systems Theory University of Stuttgart Germany Ural Branch of Russian Academy of Sciences Ekaterinburg Russia Delft Center for Systems and Control Delft University of Technology The Netherlands

Control theory deals with disciplines and methods leading to an automatic decision process in order to improve the performance of a control system. The evolution of control engineering is closely related to the evolution of the technology of sensors and actuators, and to the theoretical controller design methods and numerical techniques to be applied in real time computing. New control disciplines, new development in the technologies will fertilize quite new control application fields. Based on the contributions of the Technical Committees within CC2 the status report gives an overview of the current key problems in control theory and design, evaluates the recent major accomplishments and forecasts some new areas. It points out some control fields, which could be challenges for future research.

关键词：

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Fuzzy Rule Base Extraction by the Improved Bacterial Memetic Algorithm

Fuzzy Rule Base Extraction by the Improved Bacterial Memetic...

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International Symposium on applied Machine Intelligence and informatics (SAMI)

作者： Laszlo Gal Janos Botzheim Laszlo T. Koczy Antonio E. Ruano Department of Applied Informatics and Information Management SEK University of West Hungary Szombathely Hungary Institute of Information Technology and Electrical Engineering Széchenyi István University Gyor Hungary Department of Automation Széchenyi István University Gyor Hungary Department of Telecommunication and Media Informatics Budapest University슠of슠Technology슠and슠Economics Hungary CSI Centre for Intelligent Systems FCT University of Algarve Portugal

In this paper we introduce new methods for handling knot order violation occurred in the bacterial memetic algorithm (BMA) used for fuzzy rule base extraction. These methods perform slightly better than the method use... 详细信息

关键词： Microorganisms Biological cells Fuzzy systems Genetic algorithms Cloning Evolutionary computation Genetic mutations Data mining informatics Information technology

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Project management stage mutations within agile methodological framework process transformations

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WSEAS Transactions on Information Science and Applications 2008年第5期5卷 776-785页

作者： Markopoulos, Evangelos Bilbao, Javier Bravo, Eugenio Stoilov, Todor Vos, Tanjia E.J. Talamanca, Carlo Figa Reschwamm, Katrin Department of Informatics University of Piraeus 80 Karaoli and Dimitriou Str. Piraeus Greece Applied Mathematics Dept. University of the Basque Country Alda. Urkijo s/n. Bilbao Spain Dept. Hierarchical Systems Institute of Computer and Communication Systems Bulgarian Academy of Sciences Acad. Bonchev str. Sofia Bulgaria Information Technology Institute University of Valencia Camino de Vera s/n Valencia Spain Technology Division - ICT Area Via Giacomo Peroni 386 Roma Italy The Fraunhofer Institute for Factory Operation and Automation Fraunhofer IFF ICCL Sandtorstrasse 22 Magdeburg Germany

Projects are living entities. They are born with the project idea and end with the project termination. The time in between can last for many years, in most of the cases, requiring continuous implementation and management effort. Over the time project changes on requirements change the implementation process and in turn the management process, the maintenance process and so on. In order to maintain qualitative and quantitative project results both the project implementation and management processes need to be adjusted in the overall project changes and environment. This adjustment can be made by using agile project management methodologies, defining processes based on the identification of the project goals, constraints and expatiations. Unfortunately that is not enough, and projects, especially software projects are still in implementation and management crisis. This paper presents the concept of process mutation on project management methodological frameworks as a supplementary method to the agile models and agility the concept.

关键词： Agility Process framework Process mutation Project management

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Orientation selective contour detection using oriented motion blur

Orientation selective contour detection using oriented motio...

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2007 International Conference on Artificial Intelligence and Pattern Recognition, AIPR 2007

作者： Resko, Barna Baranyi, Péter Computer and Automation Research Institute Hungarian Academy of Sciences Cognitive Vision Research Group Hungary Budapest University of Technology and Economics Department of Automation and Applied Informatics Hungary

ISBN: (纸本)9781615677214

Cognitive informatics is a very hot topic today, trying to provide solutions to problems in computation that are easily solved by the brain but are hard for a computer. The information processing properties of the brain are taken as the basis for such artificial systems. The first step of visual information processing, the extraction of orientation selective contours, is done in the primary visual cortex. A similar, orientation based filtering can be the first step in many vision systems of cognitive informatics. This paper presents a new approach to orientation selective contour detection. Oriented motion blur is used to filter for the desired orientations. The motion blur operation is performed before digitalization, using a vibrating mirror. The proposed technique not only provides a very high speed, high resolution contour detector, but also solves the problem of contour discontinuities.

关键词： Cognitive systems

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Modelling Real-time Constraints Regarding Reconfiguration Aspects for IEC 61499 Control Applications

Modelling Real-time Constraints Regarding Reconfiguration As...

引用

IEEE International Conference on Industrial informatics (INDIN)

作者： G. Grabmair A. Zoitl T. Strasser R. Froschauer Department for Industrial Informatics University of Applied Science Wels Austria Automation and Control Institute University of Technology Vienna Austria PROFACTOR Produktionsforschungs GmbH Steyr Austria

The complexity of automation and control systems is fast increasing in order to satisfy the arising needs of the manufacturing industry. The central exigencies for new production facilities are flexibility, adaptability and reconfigurability in combination with guarantees for downtime less operation. Additionally modern automation systems are supposed to execute control applications distributed across heterogeneous networks The standard IEC 61499 introduces a function block oriented architecture which should be able to satisfy most of these new requirements. Still some of the open issues within the standards definition are the consideration of real-time constrained applications, the missing possibilities and conventions to define an explicit execution order and the absence of an appropriate modelling technique for real-time constraint specification. Furthermore in case of reconfiguration of control applications similar or different real-time requirements must be fulfilled which have to be considered during the engineering process. Therefore the main topic of this paper discusses investigations on possibilities to define and model real-time constraints within reconfigurable IEC 61499 applications.

关键词： IEC standards Automatic control Timing Control systems Manufacturing automation Programmable control Distributed control Electrical equipment industry Manufacturing industries Industrial control

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