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8kW QRAS chopper using SiC schottky diode

IEEJ Transactions on Industry Applications 2006年第7期126卷 881-887页

作者： Tsuruta, Yukinori Ito, Yoshihiro Kawamura, Atsuo Yokohama National University Graduate School of Engineering 79-5 Tokiwadai Hodogaya-ku Yokohma 240-8501 Yokohama National University 79-5 Tokiwadai Hodogaya-ku Yokohma 240-8501 Yokohama National University Institute of Electrical Engineers of Japan Institute of Electrical Engineering of Japan Robotics Society of Japan Institute of Electronics Information and Communication Engineers Society of Instrument and Control Engineers

This paper describes a study targeting a 100 kW power range converter to the fuel cell electric vehicle (FCEV). The proposed power converter offers the solutions in both high-power and high-efficiency applications. The power supply consists of new topologies based on Quasi-resonant Regenerating Active Snubber (QRAS) and new devices "SiC schottky diodes", which are already on the market as the next generation of power devices substituted for Si semiconductor devices approaching the theoretical limits of the Si material. The configuration and the performance of 8 kW one-tenth-prototype SiC-QRAS are followed by this report on the successful test evaluation results.

关键词： Power converters

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Design of an autonomous control for parallel-connected uninterruptible power supplies

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IEEJ Transactions on Industry Applications 2006年第4期126卷 444-452+11页

作者： Sato, Eduardo Kazuhide Kawamura, Atsuo Division of Advanced Physics Electrical and Computer Engineering Yokohama National University 79-5 Tokiwadai Hodogaya-ku Yokohama 240-8501 Japan IEICE Japan IEEE Japan Department of Electrical and Computer Engineering Yokohama National University Yokohama Japan Robotics Society of Japan Japan Institute of Electronics Information and Communication Engineers Japan Society of Instrument and Control Engineering Japan Yokohama National University Japan

This paper proposes an autonomous control for parallel-connected uninterruptible power supply (UPS) systems based on electrical power system interrelations. The controllable variables are the output voltage phase angle and magnitude. Relation between active current and output voltage phase angle is derived from a synchronous machine model. electrical power systems suggest that voltage regulation and reactive current can be proportionally related to yield another control equation. The resulted control scheme is very simple and only requires an output current measurement to provide a voltage reference signal locally in synchronism with other UPSs without communication signal exchange. A small-signal model represents the entire system and constitutes proof of its stability. Feasibility is confirmed by an experimental setup with three UPSs connected in parallel with different output power ratings. In the experiments, voltage limiters (1%) are employed and three cases are verified. Under all conditions, the results show excellent performance in terms of stability, and active and reactive load sharing.

关键词： Uninterruptible power systems

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Analysis of fractional - Order robot axis dynamics

Analysis of fractional - Order robot axis dynamics

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作者： Rosario, J.M. Dumur, D. Tenreiro Machado, J.A. Laboratory of Automation and Robotics Faculty of Mechanical Engineering UNICAMP - University of Campinas 13083-970 - Campinas- SP Brazil Department of Automatic Control SUPELEC 91192 - Gif-sur-Yvette France Department of Electrical Engineering Institute of Engineering Polytechnic Institute of Porto 4200-072 Porto Portugal

ISBN: (纸本)9783902661128

Robots are complex mechatronics systems where several electric drives are employed to control the movement of articulated structures. In industrial environments they must perform tasks with rapidity and accuracy in order to produce goods and services with minimal production time. These procedures require the use of flexible robots which can act in a large workspace, thus subjected to important parameters variations and nonlinear dynamics effects. This paper investigates the fractional order dynamics during the evolution of trajectories of three robotic joints, considering the complete system dynamics. Copyright © 2006 IFAC.

关键词： Calculations

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High-rise buildings under earthquake excitation: Stabilization using SMC

High-rise buildings under earthquake excitation: Stabilizati...

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作者： Dimirovski, Georgi M. Zhao, Jun Vukobratovic, Miomir K. Dogus University Faculty of Engineering Dept. of Computer Engineering Acibadem Zeamet Sk. 21 Kadikoy TR-34722 Istanbul Turkey SS Cyril and Methodius University Faculty of Electrical Engineering Rugjer Boskovic b.b. Karpos II MK-1000 Skopje Macedonia Northestern University School of Information Science and Engineering Institute of Control Science Shenyang Liaoning CN-110004 China Mihailo Pupin Institute Laboratory of Robotics and Automation Volgina 15 Karaburma 11000 Serbia

ISBN: (纸本)9783902661173

The goal to control the dynamics of high-rise buildings either to ameliorate the damage or prevent their destruction when subject to an earthquake excitation has been subject of extensive research. All known control designs have advantages and disadvantages as well as operating limits. The application of sliding-mode control to controlling earthquake induced vibrations of a multi-story structural system as an active seismic compensation plus base isolation has been investigated. The performance has been compared to the one of traditional industrial controls, and relevant conclusions drawn. Simulation results, carried out using El Centro earthquake acceleration, have shown that the sliding mode control can decrease significantly displacements of the floors. Copyright © 2006 IFAC.

关键词： Earthquakes

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A rule - Base modification for time delay systems

A rule - Base modification for time delay systems

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10th IASTED International Conference on Artificial Intelligence and Soft Computing, ASC 2006

作者： Genç, Hakký Murat Eksin, Ybrahim Güzelkaya, Müjde Yesil, Engin Marmara Research Center Information Technologies Institute 41470 Gebze Kocaeli Turkey Technical University of Ýstanbul Electrical and Electronics Faculty Control and Automation Engineering Dept. 80626 Maslak Ýstanbul Turkey

ISBN: (纸本)0889866104

In time delay control systems, the observed information is related to a past instant and using this delayed signal may cause unsatisfactory results in control system applications. This paper deals with how time delay information can be used in reorganizing the rule base so as to improve system performance. Basically, it proposes a new scheme of appropriate shifting of the rule base to compensate the information lag caused by time delay in the system. The parameters affecting the shifting scheme are discussed in detail and the shifting scheme is tabulated with respect to system model parameters. Applications of the new methodology in different systems are simulated and the effectiveness of the scheme is fully illustrated.

关键词： Time delay

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Multimedia transfer over the internet: A control based improvement of AIMD algorithm 2

Multimedia transfer over the internet: A control based impro...

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2nd International Conference on information and Communication Technologies: From Theory to Applications, ICTTA 2006

作者： Jing, Yuanwei Dimirovski, Georgi M. Institute of Control Science School of Information Science and Engineering Northeastern University Shenyang Liaoning110004 China Department of Computer Engineering Faculty of Engg. Dogus University Istanbul34722 Turkey Faculty of Electrical Eng. Institute of ASE SS Cyril and Methodius University Skopje MK-1000 Macedonia

ISBN: (纸本)0780395212

The known Additive Increase Multiplicative Decrease algorithm has been further investigated and a novel, improved TCP-friendly flow control algorithm derived. This algorithm provides basic flow congestion control for multimedia data traffic over Internet, and also fulfils the fairness between RTP flows and TCP flows while retaining essential characteristics of this algorithm. Important parameters that are involved in network's communication process have been thoroughly studied and properly introduced into the novel algorithm. Innovation work done to this known algorithm helps smoothing the multimedia transfer and guarantees the fairness among TCP flows and RTP flows. © 2006 IEEE.

关键词： Transmission control protocol

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ROBUST DECENTRALIZED controlLER DESIGN: INDEPENDENT DESIGN

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IFAC Proceedings Volumes 2006年第14期39卷 41-46页

作者： Kozáková Alena Veselý Vojtech Institute for Control and Industrial Informatics Faculty of Electrical Engineering and Information Technology Slovak University of Technology Bratislava Slovak Republic

The paper deals with the frequency domain robust decentralized controller design technique for continuous-time uncertain systems given as a set of transfer function matrices. By applying the independent designs to individual subsystems modified by pertinent entries of a suitably chosen diagonal transfer function matrix, nominal stability and fulfillment of the M – Δ structure based robust stability conditions modified for decentralized systems are guaranteed. Copyright©2006 IFAC.

关键词： robust control linear systems frequency domain

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Anti-synchronization chaos shift keying method based on generalized lorenz system

Anti-synchronization chaos shift keying method based on gene...

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作者： Čelikovský, Sergej Lynnyk, Volodymyr Šebek, Michael Institute of Information Theory and Automation Academy of Sciences of the Czech Republic P.O. Box 18 182 08 Prague 8 Czech Republic Department of Control Engineering Faculty of Electrical Engineering Czech Technical University In Prague Czech Republic

ISBN: (纸本)9783902661098

In this paper, a modified version of the Chaos Shift Keying (CSK) scheme for secure encryption and decryption of data is proposed. The proposed scheme uses the effect of anti-synchronization, rather than synchronization. More specifically, the classical CSK method determines the correct value of binary signal through checking which unsynchronized system is getting synchronized. On the contrary, our novel method determines wrong value of binary signal through checking which already synchronized system is loosing synchronization. The advantage of the proposed method is two-fold. First, it requires very reasonable amount of data to encrypt and time to decrypt a single bit. Secondly, its security can be investigated and estimated as practically unbreakable. The main reason for both advantages is that anti-synchronization is thousand times faster than synchronization, even when using two close each to other chaotic systems. Our method is implemented and thoroughly tested on the recently introduced generalized Lorenz system (GLS) family making advantage of its special parametrization. Copyright © 2006 IFAC.

关键词： Synchronization

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Robust adaptive control for complex systems employing ANN emulation of nonlinear functions

Robust adaptive control for complex systems employing ANN em...

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8th Seminar on Neural Network Applications in electrical engineering, Neurel-2006

作者： Dimirovski, Georgi M. Jing, Yuanwei Zhang, Yanxin Vukobratovic, Miomir K. IEEE Dogus University Department of Computer Engineering Acibadem - Kadikoy 34722 Istanbul Turkey SS Cyril and Methodius University Faculty of Electrical Engineering Skopje Macedonia School of Information Science and Engineering Northeastern University Shenyang China Mihailo Pupn Institute Laboratory of Robotics and Flexible Automation Karaburma 11000 Belgrade Serbia

ISBN: (纸本)1424404339

A new robust adaptive control design synthesis, which employs both high-order neural networks and math-analytical results, for a class of complex nonlinear mechatronic systems possessing similarity property has been derived. This approach makes an adequate use of the structural feature of composite similarity systems and neural networks to resolve the representation issue of uncertainty interconnections and subsystem gains by on-line updating the weights. This synthesis does guarantee the real stability in closed-loop but requires skills to obtain larger attraction domains. Mechatronic example of an axis-tray drive system, possessing uncertainties, is used to illustrate the proposed technique. © 2006 IEEE.

关键词： Neural networks

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Pusher reheating furnace control: A fuzzy-neural model predictive strategy

Pusher reheating furnace control: A fuzzy-neural model predi...

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作者： Icev, Z.A. Stankovski, M.J. Kolemishevska, T.D. Zhao, J. Dimirovski, G.M. SS Cyril and Methodius University Faculty of Electrical Engineering ASE Institute P.O.B. 574 MK-1000 Skopje Macedonia Northeastern University College of Information Science and Engineering Institute of Control Theory Shenyang Liaoning 110004 China Dogus University Faculty of Engineering Computer Engineering Department Acibadem Zeamet Sk. 21 Kadikoy TR-34722 Istanbul Turkey

ISBN: (纸本)9783902661197

A design of fuzzy model-based predictive control for industrial furnaces has been derived and applied to the model of three-zone 25 MW RZS pusher furnace at Skopje Steelworks. The fuzzy-neural variant of Takagi-Sugeno fuzzy model, as an adaptive neuro-fuzzy implementation, is employed as a predictor in a predictive controller. In order to build the predictive controller the adaptation of the fuzzy model using dynamic process information is carried out. Optimization procedure employing a simplified gradient technique is used to calculate predictions of the future control actions. Copyright © 2006 IFAC.

关键词： Optimization

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