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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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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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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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Pole placement approaches for linear and fuzzy systems

Pole placement approaches for linear and fuzzy systems

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International Symposium on Intelligent Systems and informatics (SISY)

作者： S. Preitl R.-E. Precup P. A. Clep I.-B. Ursache J. Fodor I. Skrjanc Department of Automation and Applied Informatics Polytechnic슠University of Timisoara Timisoara Romania Institute of Intelligent Engineering Systems Budapest Tech Polytechnical Institution Budapest Hungary Laboratory of Modelling Simulation and Control University of Ljubljana Ljubljana Slovenia

The paper investigates several pole placement methods in the linear case and suggests a new pole placement method by means of fuzzy linear equations. The linear methods concern the constant real part poles, the poles places on a circle, Butterworth configurations without and with the correction of the imaginary part, the pole-zero cancellation, and the poles placed on an ellipse. Low order systems are considered. The pole placement methods are compared by the digital simulation of control systemspsila behaviors with respect to the modification of the reference input. The conclusions are useful for continuous control systems, and they can be extended easily to digital control systems including quasi-continuous ones.

关键词： State feedback Fuzzy systems Control systems Equations Poles and zeros Control system synthesis Stability Digital control Nonlinear control systems automation

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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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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.

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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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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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Communication and Knowledge Intensive Engineering Modeling in Virtual Spaces

Communication and Knowledge Intensive Engineering Modeling i...

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International Symposium on applied Computational Intelligence and informatics ( SACI)

作者： Laszlo Horvath Imre J. Rudas Simona Vaivoda Zsuzsa Preitl Institute of Intelligent Engineering Systems John von Neumann Faculty of Informatics Budapest Hungary Department of Automation and Applied Informatics Fac. of Automation and Computer Science Polytechnic University of Timisoara Timisoara Romania

Engineering for development, production, and other product related company activities are being organized in virtual systems for lifecycle management of product data. This new age of engineering is a result of the continuous development for step-by-step moving of product design, analysis and other production engineering activities from conventional environments to modeling environments during the eighties and nineties. However, more developments were needed in knowledge based decision assistance in order to realize modeling of human intent, increasingly complex product structures, and efficient communication of product data. In recent years, a great change of engineering methodology and software produced program products in knowledge technology and advanced local and global communication. Group work of engineers is increasingly organized around special portals for engineering on the Internet. Although intensive research activities produced outstanding methods in knowledge-based solutions for engineering, these methods have not widespread in the industrial modeling practice. This paper attempts to evaluate the possibility that recent communication and knowledge intensive engineering modeling can be developed into communication and knowledge intensive virtual space technology. Paper starts with a discussion on integrated application of different groups of product modeling techniques. Following this, methods are evaluated for the management of product data (PDM). Next section emphasizes aspects, contexts, and intents as primary issues in modeling for relationships in product data and decisions by engineers. Finally, methods for the management of engineering activities for lifecycle of products are summarized, considering communities of engineers around Internet portals.

关键词： Knowledge engineering Data engineering Engineering management Portals Internet Production systems Design engineering Product design Production engineering Humans

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Two-Degree-Of-Freedom Fuzzy Control in Decentralized Trajectory Tracking

Two-Degree-Of-Freedom Fuzzy Control in Decentralized Traject...

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International Symposium on applied Computational Intelligence and informatics ( SACI)

作者： R.-E. Precup Z. Preitl S. Preitl S. Vaivoda J.K. Tar M. Takacs Department of Automation and Applied Informatics Polytechnic University of Timisoara Timisoara Romania Institute of Intelligent Engineering Systems Budapest Tech Polytechnical Institution Budapest Hungary

The paper presents structures and a systematic development method for two-degree-of-freedom (2-DOF) fuzzy controllers with non-homogenous dynamics with respect to the two input channels. The proposed controller structures are dedicated to a low order plant, which is specific to the field of servo-systems. The design relations are based on the fact that, in some certain conditions, fuzzy controllers and linear development methods are applicable for this situation. The presentation points out that the proposed 2-DOF fuzzy controllers can be applied in robot control and ensure good control system performance with respect to reference input and disturbance actions.

关键词： Fuzzy control Trajectory Control systems informatics Fuzzy systems Robot control Output feedback automation Automatic control Intelligent systems

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