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Practical applications of fuzzy technologies

Fuzzy Sets and Systems 2003年第1期139卷 239-242页

作者： Fernando Gomide Department of Computer Engineering and Automation Faculty of Electrical and Computer Engineering State University of Campinas Unicamp-FEEC-DCA 13083-970 Campinas-SP Brazil

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Tool for remote control of mobile robots with visualization by means of virtual reality

Tool for remote control of mobile robots with visualization ...

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International Conference on Telecommunications (ConTEL)

作者： D. Brscic Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation University of Zagreb Zagreb Croatia

This paper presents the current work on the development of a tool for remote control of mobile robots. The tool consists of a local controller on the robot side and a user interface for simulation and remote control that connects with the robot through the network. The user interface is implemented as an HTML page with a Java applet for remote control and communication and a virtual environment written in VRML for visualization. This way users have the ability to connect to a dedicated WWW server and download the user interface. This paper describes the concept of the tool design and the developed user interface.

关键词： Robot control Mobile robots Visualization Virtual reality Communication system control User interfaces HTML Java Mobile communication Virtual environment

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Composite systems control by combined math-analytical and FS/NN computing approach 3

Composite systems control by combined math-analytical and FS...

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3rd IFAC Workshop on Automatic Systems for Building the Infrastructure in Developing Countries, DECOM-TT 2003

作者： Dimirovski, Georgi M. Jing, Yuan-Wei Zhao, Jun Zhang, Si-Ying Dogus University Department of Computer Engineering Faculty of Engineering Acibadem Kadiköy IstanbulTR-34722 Turkey SS Cyril and Methodius University Institute of Automation and Systems Eng Faculty of Electrical Engineering SkopjeMK-1000 Macedonia Northeastern University Institute of Control Science School of Information Science and Eng. Shenyang Liaoning China

A control systems engineering approach, employing a two-level overall system architecture and different but compatible formalisms for system representation on the upper and lower levels, has been investigated in detail. One design alternative is based on employing fuzzy-system approximators and solving for the adaptive tracking of the given, arbitrary, desired system outputs. The other alternative is based on state equations of composite systems and the use of neural-network approximators to deal with uncertainties and control adaptation. In both alternatives similarity property of subsystems has been exploited. Both designs can be implemented within the standard computer process control technology, and are therefore believed to be promising in applied systems engineering. Copyright © 2003 IFAC.

关键词： Fuzzy systems

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Technology Transfer to Developing Countries and Technological Development for Social Stability

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IFAC Proceedings Volumes 2003年第9期36卷 39-44页

作者： G.M. Dimirovski A. Talha Dinibutun Dogus University Faculty of Engineering Department of Computer Engineering Acibadem Zeamet Sk. No:21 TR-34722 Kadikoy - Istanbul Republic of Turkey SS Cyril and Methodius University Faculty of Electrical Engineering Inst of Automation & Systems Eng. MK-1000 Skopje Rep. of Macedonia

This is the scond part of a easy study reports on an attempt to develope a framework and conceptual model of optimising development decisions in technology transfer for social stability and sustainable society development. It is grounded on Mansours systems science approach to the contemporary society systems and of his philosophy of fairness and justice on the presumptions laid dawn by of ethics and ecumenical religious tolerance, and on Dimirovskis strucatural system model of of the interactive impact of human-centred systems in knowledge and technology transfer for development and co-operation. It is claimed that social consciousness world-wide identifies different standards and preconditions that countries of so-called West introduced insofar into tackling the issues of the globalisation have induced individual and collective anti-globalisation opposition processes, regardless the fact that process of economic and cultural globalization is a natural developmental phenomenon within contemporary societies of Mankind. The issues and problems of a fairness transfer of both knowledge and technology to less and developing countries may well be a crucial tool for enhancing the positive effects of the globalisation.

关键词： Conflicting interests sustainable development knowledge transfer social stability technology transfer

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An agent-based platform for service integration in e-maintenance

An agent-based platform for service integration in e-mainten...

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IEEE International Conference on Industrial Technology (ICIT)

作者： Wei Zhang W. Halang C. Diedrich Faculty of Electrical and Computer Engineering Fern Universität Hagen Hagen Germany Department of Automation Systems Institut für Automation und Kommunikation e.V. Magdeburg (ifak) Barleben Germany

The evolution of industrial systems makes the maintenance tasks more and more important. Encouraged by the requirements of industrial companies, we provide a solution to the problems of both industrial maintenance and enterprise integration by integrating industrial systems and field devices. With agent, Web and other technologies, e-maintenance and e-enterprise are becoming possible. E-maintenance is considered as one example of e-enterprise. A dynamic system model is constructed by extracting sources and targets, goals, and maintenance processes in terms of information flow between information nodes. An agent-based platform architecture seeks to integrate industrial systems in terms of e-maintenance, e.g., data acquisition systems, expert systems and business management systems.

关键词： automation Predictive maintenance Industrial control Electrical equipment industry Enterprise resource planning computer industry Software systems Knowledge management Automatic control Control systems

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Motion control via telecommunication networks: Random time delays and a simple stability design

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IFAC Proceedings Volumes 2003年第7期36卷 257-262页

作者： Ali Okatan Georgi M. Dimirovski Bahcesehir University Department of Computer Engineering Faculty of Engineering Bahçeşehir TR-34538 Istanbul Turkey Fax: +90-212-669 4398 Doğus University Department of Computer Engineering Faculty of Engineering Acibadem - Zeamet Sk. No:21 Kadiköy TR-34722 Istanbul Turkey Fax: +90-216-327 9631 SS Cyril and Methodius University Institute of Automation & Systems Engineering Faculty of Electrical Engineering Ruger Boskovic B.B. Karpos 2 MK-1000 Skopje Macedonia

Motion control and navigation via telecommunications networks as well as the control of other dynamical systems recently again came in the focus by a number of authors world-wide. It has been subject to extensive investigation because of remote motion control applications, and also because of the impact of random time delays caused by telecommunication networking, e.g., Internet. The most essential phenomenon in implementing remote control via Internet networking is that of a random, time varying pure time delay. In turn, this phenomenon gives rise to the issue of closed-loop stability which may cause control performance deterioration, and even instability brake down of such control systems. Within the limitations of using linear models of the dynamics of controlled object - remote motion control process in open-loop system, a through design analysis is feasible and has been elaborated in the course of our research. In order to ensure the system stability, the maximum expected time-delay phenomenon must be observed at design stage of the control system. Hence the main design conclusion is to ensure that system parameters be adjusted according to the maximum expected delay distributions always.

关键词： Automatic control automated guided vehicles design analysis internet motion control random telecommunications time delay remote control stability

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Real-Life Scheduling Using Constraint Programming and Simulation

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IFAC Proceedings Volumes 2003年第3期36卷 233-238页

作者： András Kovács József Váncza Botond Kádár László Monostori András Pfeiffer Faculty of Electrical Engineering and Informatics Budapest University of Technology and Economics Budapest Hungary Computer and Automation Research Institute Hungarian Academy of Sciences Kende u. 13-17 H-1111 Budapest Hungary

The paper presents an integrated production planner and job shop scheduler system with flexible modelling capabilities and powerful, scalable solution methods. The system generates close-to-optimal production and capacity plans on the medium term, and detailed production schedules on the short-term. However, the constraint-based, deterministic scheduling model can hardly account for all the uncertainties on the shop floor. Hence, we included such factors into a discrete-event simulation model that is applied to evaluate the robustness of schedules in face of various uncertainties

关键词： production planning constraint-based scheduling simulation

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Wavelet transform for image analysis

Wavelet transform for image analysis

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Siberian Conference on Control and Communications (SIBCON)

作者： V. Skorpil J. Stastny Faculty of Electrical Engineering and Communication Brno University of Technology Brno Czech Republic Brno University of Technology Institute of Automation and Computer Science Brno Czech Republic

The wavelet transform is a comparatively new and fast developing method for analysing signals. The main advantage of applying the wavelet transform to the detection of edges in an image is the possibility of choosing the size of the details that are detected. The size of detected edges is set by the wavelet scale. In the case of the discrete wavelet transform the choice of the scale is performed by multiple signal passage through the wavelet filter. When processing a 2-D image, the wavelet analysis is performed separately for the horizontal and the vertical function. The vertical and the horizontal edges are thus detected separately. The wavelet transform splits the input signal into two components. One contains the low-frequency (LP) part of input signal, which corresponds to major changes in the function (individual objects in the image, etc.). The other part contains the high-frequency (HP) part of input signal, which corresponds to details in the function (noise, edges, etc.). This signal component is not processed on the next level of transformation.

关键词： Wavelet analysis Wavelet transforms Image analysis Image edge detection Discrete wavelet transforms Signal analysis Filters Performance analysis Low-frequency noise Signal processing

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Synchronous machine-turbine drive system with indirect speed control

Synchronous machine-turbine drive system with indirect speed...

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IEEE International Conference on Electric Machines and Drives (IEMDC)

作者： R.K. Jardan I. Nagy Faculty of Electrical Engineering and Informatics Department of Automation and Applied Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Computer and Automation Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary

Dynamic properties of a hybrid system are analyzed that has been developed to generate electric energy by utilizing alternative, renewable and waste energies. The solution is based on a system that consists of a high-speed turbine, coupled to a three-phase permanent magnet synchronous generator, an AC/AC converter and a supervisory control unit. The function of the system is to utilize the energy content of some working medium by a special turbine that converts the energy content of the working medium into electric energy by the generator and the AC/AC converter. The alternative renewable energy sources may include solar energy (direct solar steam system or solar energy with heat exchanger), geothermal energy (with or without heat exchanger) and energy obtained from biomass. Various waste energy sources can also be utilized by applying the system such as the energy that can be obtained during the process of pressure reduction in steam, gas and fluid networks. The electric power generated by the system can be fed back to the utility mains or it can be used in stand-alone mode to supply a selected group of loads. The paper analyses a novel control strategy and principle of the system to ensure optimum performance and economy by using a special solution for ensuring the power equilibrium in the combined mechanical-electric drive.

关键词： Velocity control Turbines Geothermal power generation Solar energy Solar heating Magnetic analysis Hybrid power systems Couplings Permanent magnets Synchronous generators

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Optimization of PM brushless DC motor drive

Optimization of PM brushless DC motor drive

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IEEE International Conference on Industrial Technology (ICIT)

作者： P. Crnosija T. Bjazic R. Krishnan Faculty of Electrical Engineering and Computing Department of Control and Comp. Eng. in Automation University of Zagreb Zagreb Croatia The Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA

Traditional approaches to controller designs that guarantee fast compensation of load torque and reference variations result in design iterations and most of the time in poorer response for load torque variations. In this paper a reference model for desired drive behavior generation and optimization methods has been applied to achieve controller integral time constant lower than the maximum time constant of the PM brushless DC motor drive. Presented simulation results show that using reference model for desired drive behavior generation, it is possible to determine optimal controller parameters for faster (10 time) and better (2 time) load torque compensation than in the case of traditional design of speed controller parameters. Response due to reference input with constrained overshoot has been achieved using a filter in the servosystem input. Thereby, the proposed method demonstrates the design of a speed controller that is optimal for both load torque and reference variations and its verification with simulation are accomplished for a permanent magnet brushless dc motor drive.

关键词： Brushless DC motors Torque control Optimal control Time factors DC generators Optimization methods Magnetic separation Filters Servosystems Design methodology

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