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Power Conversion Conference

作者： T. Intachot W. Klungwijit Y. Prempraneerach S. Nitta Department of Control Engineering Faculty of Engineering King Mongkut''s Institute of Technology Ladkrabang Bangkok Thailand Department of Electronic Technology Faculty of Industrial Technology Valaya-Alongkorn Rajabhat University Pathum Thani Thailand Graduate School Production System Engineering Salesian Polytechnic Tokyo Japan

ISBN: (纸本)1424408431;9781424408436

General switching converter such as the simple high-side switching circuit inherently has unbalanced characteristics of impedance of transmission path, voltage at dc source and load terminals with respect to the frame ground. These unbalanced characteristic effects are the cause of unbalanced voltages at both dc source and load terminals. These unbalanced voltages will produce common-mode noise flowing through frame ground to the LISN during the active switch turn-off and on. This paper presents the analytical and experimental consideration of common-mode noise generation due to the unbalanced effect. The mechanism of common-mode noise generation due to unbalanced effect can be explained by equivalent circuit in both turn-off and turn-on time of the active switch. For common-mode noise reduction, the method for balancing the switching converter is also presented. Common-mode noise generated due to the effect of circuit imbalance is clarified by the experimental results. The balanced switching converter can greatly reduce the common-mode noise is also confirmed by the experimental results.

关键词： Circuit noise Noise generators Character generation Switching circuits Switches Switching converters Voltage Active noise reduction Noise reduction Impedance

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A Study On Iterative Learning control With Adjustment Of Learning Interval For Monotone Convergence In The Sense Of Sup-Norm

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Asian Journal of control 2008年第1期4卷

作者： Kwang-Hyun Park Zeungnam Bien Division of EE Department of EECS Korea Advanced Institute of Science and Technology 373–1 Kusong-dong Yusong-gu Taejon 305–701 Korea. Zeungname Bien:received the B.S. degree in electronics engineering from Seoul National University Seoul Korea in 1969 and the M.S. and Ph.D. degrees in electrical engineering from the University of Iowa Iowa City Iowa U.S.A. in 1972 and 1975 respectively. During 1976–1977 academic years he taught as assistant professor at the Department of Electrical Engineering University of Iowa. Then Dr. Bien joined Korea Advanced Institute of Science and Technology summer 1977 and is now Professor of Control Engineering at the Department of Electrical Engineering and Computer Science KAIST. Dr. Bien was the president of the Korea Fuzzy Logic and Intelligent Systems Society during 1990–1995 and also the general chair of IFSA World Congress 1993 and for FUZZ-IEEE99 respectively. He is currently co-Editor-in-Chief for International Journal of Fuzzy Systems (IJFS) Associate Editor for IEEE Transactions on Fuzzy Systems and a regional editor for the International Journal of Intelligent Automation and Soft Computing. He has been serving as Vice President for IFSA since 1997 and is now Chief Chairman of Institute of Electronics Engineers of Korea and Director of Humanfriendly Welfare Robot System Research Center. His current research interests include intelligent control methods with emphasis on fuzzy logic systems service robotics and rehabilitation engineering and large-scale industrial control systems. Kwang-Hyun Park:received the B.S. M.S. and Ph.D. degrees in electrical engineering and computer science from KAIST Korea in 1994 19997 and 2001 respectively. He is now a researcher at Human-friendly Welfare Robot System Research Center. His research interests include learning control machine learning human-friendly interfaces and service robotics.

It has been found that some huge overshoot in the sense of sup-norm may be observed when typical iterative learning control (ILC) algorithms are applied to LTI systems, even though monotone convergence in the sense of λ-norm is guaranteed. In this paper, a new ILC algorithm with adjustment of learning interval is proposed to resolve such an undesirable phenomenon, and it is shown that the output error can be monotonically converged to zero in the sense of sup-norm when the proposed ILC algorithm is applied. A numerical example is given to show the effectiveness of the proposed algorithm.

关键词： Iterative learning control monotone convergence learning interval sup-norm

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A New Approach of Thermal Power Plant Model Using VVVF Inverter for Accuracy Improvement

A New Approach of Thermal Power Plant Model Using VVVF Inver...

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International Conference on Electrical Machines and systems 2007(ICEMS2007)(第十届国际电机与系统会议)

作者： N. Matsui F. Kurokawa Chouryou Control System CO. LTD Japan Department of Electrical and Electronic Engineering Nagasaki University Japan

The purpose of this paper is to present a new approach of thermal power plant model for accuracy improvement in the dynamic characteristics. As a result, an error is less then 0.7％ in static characteristics and less then 3.4％ in dynamic characteristics simulation model differential of actual plant. This shows that the accuracy of the proposed model is three times as much as a standard one.

关键词： Power generation Inverters Boilers Fluid flow control Power system modeling Fuels Furnaces Combustion Temperature Ducts

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Robust quadratic optimal control of uncertain TS-fuzzy-model-based dynamic systems

Robust quadratic optimal control of uncertain TS-fuzzy-model...

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IEEE International Conference on systems, Man and Cybernetics

作者： Wen-Hsien Ho Jinn-Tsong Tsai Tung-Kuan Liu Jyh-Horng Chou Department of Medical Information Management Kaohsiung Medical University Taiwan Department of Computer Science National Ping Tung University of Education Taiwan Department of Mechanical and Automation Engineering National Kaohsiung First University of Science and Technology Taiwan Institute of System Information and Control National Kaohsiung First University of Science and Technology Kaohsiung Taiwan

This paper considers the design problem of the robust quadratic-optimal parallel-distributed-compensation (PDC) controllers for the Takagi-Sugeno (TS) fuzzy-model- based control systems with both elemental parametric uncertainties and norm-bounded approximation error. An integrative method, which complementarily fuses the robust stabilizability condition, the orthogonal-functions approach (OFA) and the hybrid Taguchi-genetic algorithm (HTGA), is presented in this paper to design the robust quadratic-optimal PDC controllers, in which the robust stabilizability condition is proposed in terms of linear matrix inequalities (LMIs).

关键词： Robust control Optimal control Nonlinear control systems control systems Uncertainty Approximation error Fuzzy control Fuzzy systems Algorithm design and analysis Nonlinear dynamical systems

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Developing antiphase boundaries in one-monolayer Tl∕Ge(100) system by re-bonding of underlying Ge dimers

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Physical Review B 2007年第19期76卷 193302-193302页

作者： A. A. Saranin A. V. Zotov I. A. Kuyanov Yu. V. Luniakov M. Katayama K. Oura Institute of Automation and Control Processes 690041 Vladivostok Russia Faculty of Physics and Engineering Far Eastern State University 690000 Vladivostok Russia Department of Electronics Vladivostok State University of Economics and Service 690600 Vladivostok Russia Department of Electronic Engineering Faculty of Engineering Osaka University Suita Osaka 565-0871 Japan Research Center for Ultra-High Voltage Electron Microscopy Osaka University Ibaraki Osaka 567-0047 Japan

Using scanning tunneling microscopy, it has been found that a one-monolayer Tl∕Ge(100)2×1 surface demonstrates a fascinating possibility to form antiphase boundaries (APB’s) by re-bonding underlying Ge dimers. This is in contrast to adsorbate-free Si(100) and Ge(100) surfaces and one-monolayer Tl∕Si(100) system, where APB formation does not occur. Energetics of APB formation in various systems, including adsorbate-free Si(100) and Ge(100) surfaces and Tl∕Si(100) and Tl∕Ge(100) systems, have been evaluated using first-principles total-energy calculations, which reveal that Tl∕Ge(100) is the only system where APB formation is the energetically favorable process.

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Remote Measurement of Electric current Using Magneto-Optic Technique

Remote Measurement of Electric current Using Magneto-Optic T...

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IEEE Sensors Applications Symposium, SAS

作者： Mahfoozur Rehman Basem Abdul Jalil Narayanan M. R. Saad Mechatronic Group School of Electric and Electronics Engineering Universiti Sains Islam Malaysia Nibong Tebal Penang Malaysia Mechatronic Group Engineering Campus Nibong Tebal Pinang Malaysia Research Scholar School of Electric and Electronic Engineering Universiti Sains Islam Malaysia Malaysia Research Scholar Universiti Sains Malaysia Engineering Campus Department of Automation and System Technology Helsinki University of Technology Finland

The paper deals with the details of an interesting technique which helps in the remote measurement of Electrical current using magnetic and optic devices. Major advantage of the presented technique is the isolation of measuring system from the actual power circuit. It will help in the repair of measuring system without closing the main circuit which is a crucial requirement of supply system. It has been successfully used for the measurement of current up to 75 A.

关键词： Current measurement Electric variables measurement Optical sensors Magnetic field measurement Magnetic sensors Voltage Circuit testing Optical devices Sensor systems Integrated circuit measurements

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Synthesis and Photocatalytic Capability of Cr- TiO2 film

Synthesis and Photocatalytic Capability of Cr- TiO2 film

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2007年纳米光电子学国际学术会议

作者： Xiaojuan Lu Duowang Fan Duojin Fan Hongzhong Liu School of Automation and Electric Engineering Lanzhou Jiaotong University Lanzhou 730070 People's MOE key lab of Opto-electronic Technology and Intelligence Controll Lanzhou Jiaotong University La Lanzhou Dachen Automatic Control System Co. Ltd Lanzhou 730070 and People's Republic of China State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong university Xi'an 710049

A TiO2 catalyst doped by Cr was prepared by the sol-gel method and characterized by UV-2550 and FS. The results reveal that the Cr6+-doped TiO2 film has the higher photocatalytic activity than pure TiO2 *** Semiconductor photocatalysts, mainly TiO2, have attracted much attention in last decade because of their potential application in the removal of many organic and inorganic pollutants in air or water. Many studies have been carried out on the application and modification of TiO2, and various photocatalytic reactors have been investigated according to respective application demands for the purification of air and water. In the water and wastewater treatment field, slurry reactor is the most common device because of its high specific surface area and good dispersion. However, the use of TiO2 slurry reactor is still limited mainly due to difficult separation of TiO2 particles from treated water. To overcome the problem, Titania beads, TiO2 based thin film, fiberglass loaded with titania, and encapsulated titania within a zeolite framework have been prepared and used in fixed bed. However, the activity of TiO2 photocatalyst is reduced to a considerable extent by these immobilization techniques because the effective surface area of photocatalysts is decreased considerably. The aim of this study is to obtain a magnetically separable photocatalyst, which is stable and easy to be prepared. In the work, Cr as magnetic cores was prepared by liquid catalytic phase transfer method at low temperature, and magnetically separable TiO2- Cr photocatalysts were synthesized. Their physicochemical properties and photocatalytic activity for degradation of methyl orange in water were investigated.

关键词： Chromium Water pollution Inductors Semiconductor films Wastewater treatment Slurries Magnetic separation Air pollution Purification Surface treatment

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Automated Design and Implementation of Resonant controllers for Current control of Shunt Active Filters

Automated Design and Implementation of Resonant Controllers ...

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2007 International Conference on Power electronics and Drive systems (PEDS 2007), vol.1

作者： W. Lenwari M. Sumner P. Zanchetta Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand School of Electrical and Electronic Engineering University of Nottingham Nottingham UK

This paper presents the automated design of resonant controllers for current control of three phase shunt active filters. The design methods employs a Genetic Algorithm (GA) based routine. The resonant control compensator is introduced in order to improve the control accuracy and performance for ac input signals. An accurate harmonic current control for shunt active filters can be achieved using resonant compensators. In this paper, the current control system is designed to operate with a single dq reference frame, synchronous with the 50 Hz supply voltage, for the compensation of all main harmonic currents, 5th, 7th, 11th and 13th. The design procedure and the principle of the proposed control method are presented. Experimental results confirm the accuracy and effectiveness of the GA-designed compensators, showing excellent harmonic current tracking performance.

关键词： Power Quality Harmonic Current control Shunt Active Filter Resonant controller

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Combined Photovoltaic/Thermal Energy system for Stand-alone Operation

Combined Photovoltaic/Thermal Energy System for Stand-alone ...

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2007 IEEE International Symposium on Industrial electronics (ISIE 2007), vol.6

作者： Rafael K. Jardan Istvan Nagy Angel Cid-Pastor Ramon Leyva Abdelali El Aroudi Luis Martinez-Salamero Department of Automation and Applied Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Department of Electrical Electronic and Automatic Control Engineering University of Rovira i Virgili Tarragona Spain Department of Electrical Electronic and Automatic Control Engineering Universitat Rovira i Virgili Tarragona Spain

The utilization of solar energy can be made by photovoltaic (PV) cells to generate electric power directly and solar thermal (T) panels can be applied to generate heat power. When the utilization of the solar energy is necessary to generate electric power, the option of using T panels in combination with some heat/electric power conversion technology can be a viable solution. The power generated by utilizing the solar energy absorbed by a given area of solar panel can be increased if the two technologies, PV and T cells, are combined in such a way that the resulting unit will be capable of co-generation of heat and electric power. In the present paper combined Photovoltaic/Thermal panels are suggested to generate heat power to produce hot water, while the photovoltaic part is used to obtain electric power mainly for covering the electric power consumption of the system, to supply the electronic control units and to operate pump drives etc. Ac and dc supplies are provided by converters for covering self-consumption and possibly the need of some household appliances. The development and design of the system is made by extensive use of modeling and simulation techniques. In the paper a part of the simulation studies, carried out to determine the energy balance in the electric energy conversion section of the system and the control structure, assuming stand-alone operation is presented.

关键词： Photovoltaic systems Solar power generation Power generation Cogeneration Solar energy Solar heating Heat pumps Water heating Temperature control control systems

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ACO-based fair energy usage routing algorithm for wireless sensor networks

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Moshi Shibie yu Rengong Zhineng/Pattern Recognition and Artificial Intelligence 2007年第2期20卷 275-280页

作者： Liang, Hua-Wei Chen, Wan-Ming Li, Shuai Mei, Tao Meng, Max Department of Automation University of Science and Technology of China Hefei 230027 China Center for Biomimetic Sensing and Control Research Institute of Intelligent Machines Chinese Academy of Sciences Hefei 230031 China Department of Electronic Engineering The Chinese University of Hong Kong Shatin Hong Kong

How to make good use of the limited energy to maximize the network life span is an important problem in the study of the wireless sensor networks (WSN). The life of a WSN depends on the minimum of the residual energy of its nodes. A fair energy usage routing algorithm is proposed which uses the ant colony optimization algorithm (ACO) to balance the network energy distribution and extend the network life. The proposed algorithm utilizes the dynamic adaptability and optimization capabilities of the ant colony to get a tread-off between the shortest path and the fair energy usage. Simulation results show that the proposed algorithm is good at balancing the energy usage, and it effectively extends the span of the network life. The network life span using the ACO-based fair energy usage routing algorithm is extended over 33% compared with the one using the shortest path optimization algorithm.

关键词： Ant colony optimization (ACO) Energy balance Network life span NP complete problem

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