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IEEE International Conference on Networking, Sensing and Control

作者： Xin Qiao Zhixue Wang Yuan Sun Feng He Fei-Yue Wang Key Laboratory of Complex Systems and Intelligence Science Institute of Automation Chinese Academy and Sciences Beijing China Institute of Computing Chinese Academy and Sciences Beijing China Department of Systems and Industrial Engineering University of Arizona Tucson Tucson AZ USA Key Laboratory for Complex Systems and Intelligence Science Chinese Academy and Sciences Beijing China

Today, more and more Electronic Control Units have been installed in vehicle, and Controller Area Network is one of the most widely used networks to connect these ECUs, also the architecture of OSEK is increasingly employed into the design of individual ECU and the network. In this paper, we propose a new framework to design the ECU with limited-storage-space. In the framework, an infinite cycle acts as a mainframe, and the code conforming to OSEK NM is inserted into the cycle. A siren of vehicle is developed with this method, and a Hardware-In-Loop test is accomplished. The results show that the framework is available, and the real-time performance of the siren is satisfied.

关键词： Automobiles Electrical equipment industry Industrial control Vehicle safety Read only memory Automotive engineering Distributed control Manufacturing industries Control systems Wiring

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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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Web Services for the new Internet: Discussion and Evaluation of the Provisioning of Interdomain Services

Web Services for the new Internet: Discussion and Evaluation...

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2006 International Telecommunications Symposium (ITS)

作者： Verdi, Fabio L. Pasquini, Rafael Magalhaes, Mauricio Madeira, Edmundo IEEE Department of Computer Engineering and Industrial Automation (DCA) School of Electrical and Computer Engineering (FEEC) State University of Campinas (Unicamp) Institute of Computing (IC) State University of Campinas (Unicamp)

ISBN: (纸本)9781424436446

In these last few years, the Internet as it is today has put some limitations on the evolution of new services. Problems such as address space scarcity, mobility, sensor networks and VoIP are becoming common requirements now and will be more frequent in future. However, the current Internet architecture does not support this evolution. In 2003, Jon Crowcroft [1] discussed the problems of the Internet Architecture. In January 2005, a report from NSF [2] addressed the barriers that need to be faced in order to overcome limitations towards a new internetworking architecture. In this paper, we discuss how Web services can be useful in solving some interdomain problems. The strong interaction between ISPs already exists and will be more necessary as new services appear. We believe that the Web services solution is a facilitator in this path. Our discussion is supported by the CANARIE [3] research point of view that everything is a service. We use this idea in the context of interdomain interactions where each domain is then seen as a service. We developed an architecture to support these interactions and evaluated the prototype in terms of time and bandwidth consumption to provide interdomain services.

关键词： Next Generation Internet Interdomain Provisioning of Services Web Services Optical Networks

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Determination of operating limits of underexcited synchronous generator by measurements

Determination of operating limits of underexcited synchronou...

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41st International Conference on Large High Voltage Electric Systems 2006, CIGRE 2006

作者： Maljković, Z. Ilić, I. Gašparac, I. Pavlica, M. Višković, A. Andročec, I. Department of Electrical Machines Drives and Automation Faculty of Electrical Engineering and Computing University of Zagreb Croatia Development Department HEP d.d. Croatia

In the underexcitation quadrant, standard power chart of synchronous generator has its limit defined by practical stability limit and by field current minimum. However, during the time, some generators have shown certain sensitivity during the permanent underexcited operation even in the stabile operating area due to local heating of magnetic conductive parts in the end region of the machine. Underexcited operation is usually required in case of raised network voltage while the active power demands are lowered. Precise knowledge of limits of underexcited operation ability enables precise planning of system reactive power trading. Some world experiences, axial magnetic field measurements, as well as local heating measurements in the end region of synchronous generator are presented. Based on mentioned measurements, it is possible to define real power chart which almost always deviates in capacitive operating area compared to manufacturer's diagram.

关键词： Synchronous generators

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Modelling the dynamic behaviour of CNC machine tool feed drives by using a novel 2D transmission line model 6

Modelling the dynamic behaviour of CNC machine tool feed dri...

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6th International Conference European Society for Precision engineering and Nanotechnology, EUSPEN 2006

作者： Pislaru, C. Moreno-Castaneda, V.Y. Ford, D.G. Myers, A. Transilvania University Brasov Automation Department 29 Bd Eroilor Brasov500 036 Romania School of Computing and Engineering University of Huddersfield United Kingdom

ISBN: (纸本)0955308208

A novel 2D Transmission Line Matrix (TLM) model is proposed for evaluating the performance of CNC machine tool digital feed drives. This modelling approach is used to represent accurately the dynamic behaviour of a ball-screw system. The influence of geometric errors over the machining accuracy across the working volume is included. The model is implemented in MATLAB and the simulation results compare well to the ball bar measurements for the same stimuli conditions on the actual machine. In this way the proposed 2D TLM model is validated.

关键词： MATLAB

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A Possibility of Applying Differential Digital Holography in Manufacturing Process

A Possibility of Applying Differential Digital Holography in...

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International Symposium on Electronics in Marine (ELMAR)

作者： Kresimir Nenadic Igor Novak Josip Job Franjo Jovic Zeljko Jagnjic Department of Computing Osijek Croatia Department of Automation and Computer Engineering Osijek Croatia

This paper presents a method for detecting the small changes in image patterns applied on ceramic tiles using differential digital holography. Holograms are constructed from tile images using composition of spherical waves. One hologram is created from ceramic tile with correct pattern and the other hologram is created from tile with small error in pattern. The two holograms are subtracted and resulting hologram is observed. Next step in the process is creating image from subtracted holograms. The results show that for small change in the tile pattern there is a great alteration in the hologram and reconstructed image. The experiment is repeated with different tile errors in patterns

关键词： Holography Manufacturing processes Tiles Ceramics Image reconstruction Pixel Computer aided manufacturing Inspection Manufacturing automation Error correction

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Filter Designs for VDSL Analog Front End

Filter Designs for VDSL Analog Front End

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Mediterranean Electrotechnical Conference (MELECON)

作者： N. Stojkovic S. Jokic M. Bratulic P. Jakovcic Department of Automation Electronics and Computing Faculty of Engineering University of Rijeka Rijeka Croatia

In the paper different fourth order filter designs with different transfer function approximations are discussed. Specifications on the filters are given for VDSL signal processing. Transfer functions and filter elements are given and sensitivity and noise for each design are calculated. The lowest sensitivity is obtained using a cascade of Rauch biquads, the lowest noise gives Akerberg-Mosberg design and the best selectivity is obtained using an elliptic filter. That leads to compromise in VDSL filter design. Also, transfer function approximation significantly determine overall specifications

关键词： Filters Function approximation Chebyshev approximation Transfer functions Signal processing Cutoff frequency Proposals OFDM modulation Topology Image converters

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Supervisory control by using active virtual 3D models in-the-loop

Supervisory control by using active virtual 3D models in-the...

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IEEE International Conference on Computer-Aided Design

作者： Tomislav Reichenbach Damjan Miklic Zdenko Kovacic Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation University of Zagreb Croatia

Virtual 3D models play important role in a today factory layout design, physical modeling, control synthesis, performance analysis, dynamic simulation and visualization of real systems. In this paper, we go one step further and besides visualization, we monitor all measurable states in the real system and use active 3D models in-the-loop for real-time supervisory control. Such concept enables an event detection not possible with conventional sensors, including the ability to predict possible outcomes in the system operation. A virtual environment simulator and the way it can be connected to other simulators (e.g., Matlab/Simulink), is presented. The examples of virtual sensors, and collision free-based trajectory planning for robotic manipulators are demonstrated

关键词： Supervisory control Mathematical model Visualization Production facilities Control system synthesis Performance analysis Analytical models Real time systems Event detection Sensor systems

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Low-frequency square-wave electronic ballast with resonant ignition using digital mode and power control

Low-frequency square-wave electronic ballast with resonant i...

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21st Annual IEEE Applied Power Electronics Conference and Exposition, APEC '06

作者： Azcondo, Francisco J. Javier Diaz, F. Casanueva, Rosario Brañas, Christian Zane, Regan Department of Electronics Technology System and Automation Engineering University of Cantabria Ave. de los Castros s/n 39005 Santander Spain Colorado Power Electronics Center Department of Electrical and Computing Engineering University of Colorado Boulder CO 80309-0425 United States

ISBN: (纸本)0780395476

The paper proposes the use of a single full-bridge (FB) inverter and LC filter in HID electronic ballast, realizing both the functions of a resonant circuit for lamp ignition and a current controlled low frequency square wave inverter for normal operation. Ignition is achieved by resonance when the converter is controlled as a FB inverter at the resonant frequency of the LC filter. After ignition the converter operates as a LF square wave inverter by controlling the FB to act alternately as a Buck converter supplying positive or negative current. While ignition occurs at the LC filter resonance, the Buck converter switching frequency is selected significantly higher to attenuate high frequency harmonics and avoid exciting acoustic resonances. System stability is achieved by controlling the input current to the FB (output current of the PFC frontend), resulting in a power mode control provided that the voltage supplied by the PFC stage is constant. A digital control circuit selects the different operation modes of the FB converter according to the lamp requirements. © 2006 IEEE.

关键词： Electric inverters

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Fuzzy Logic Control of Synchronous Generator Under the Condition of Transient Three Phase Short Circuit

Fuzzy Logic Control of Synchronous Generator Under the Condi...

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International (EPE-PEMC) Power Electronics and Motion Control Conference

作者： Damir Sumina Tomislav Idzotic Igor Erceg Faculty of Electrical Engineering and Computing Department of Electric Machines Drives and Automation Zagreb Croatia

This article is focused on the implementation of fuzzy logic excitation control of a synchronous generator. A simple fuzzy logic control scheme for voltage control and generator stabilization is tested on the real laboratory model that includes digital system for excitation control (based on four DSPs) and synchronous generator connected to an AC system through transformer and two parallel transmission lines. The experiments were performed for transient three phase short circuit on the one transmission line. The behaviour of the excitation system with fuzzy logic stabilizing controller is compared with excitation system based on the PI voltage controller and conventional power system stabilizer

关键词： Fuzzy logic Synchronous generators Voltage control Power system transients Power transmission lines Distributed parameter circuits Control systems AC generators Circuit testing Logic testing

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