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作者： Kočvara, M. Leibfritz, F. Stingl, M. Henrion, D. Faculty of Electrical Engineering Czech Technical University Technická 2 166 27 Prague Czech Republic Institute of Information Theory and Automation Pod vodárenskou věží 4 182 08 Prague Czech Republic Department of Mathematics University of Trier Universitåtsring 15 54286 Trier Germany Institute of Applied Mathematics University of Erlangen Martensstr. 3 91058 Erlangen Germany LAAS-CNRS 7 Avenue du Colonel Roche 31077 Toulouse France

ISBN: (纸本)008045108X

We present an algorithm for the solution of static output feedback problems formulated as semidefinite programs with bilinear matrix inequality constraints and collected in the library COMPleib. The algorithm, based on the generalized augmented Lagrangian technique, is implemented in the publicly available general purpose software PENBMI. Numerical results demonstrate the behavior of the code. Copyright © 2005 IFAC.

关键词： Constrained optimization

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Reduced-order filtering for descriptor systems with Markovian switching

Reduced-order filtering for descriptor systems with Markovia...

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International Conference on Control and Automation (ICCA)

作者： Xiaomei Zhang Guoping Lu Yufan Zheng China and Department of Applied Mathematics Nantong University Nantong China Department of Computer Science and Technology East China Normal University Shanghai China College of Electronic Engineering Nantong University Nantong China Department of Electrical and Electronics Engineering University of Melbourne VIC Australia

This paper deals with the filtering problem for a class of continuous-time descriptor systems with Markovian jumping parameters. The purpose of the problem addressed is to design a reduced-order filter such that the dynamics of each estimation error is guaranteed to be exponentially stable in the mean square. Sufficient conditions for the existence of such reduced-order filters are given, which are described by a set of linear matrix inequalities. An example is presented to illustrate the effectiveness of the proposed method.

关键词： Filtering Linear matrix inequalities State estimation Symmetric matrices Estimation error Sufficient conditions Nonlinear filters Power system interconnection Power system modeling Filtration

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Nonlinear response of permanent dipoles in a uniaxial potential to alternating fields

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Physical Review E 2005年第6期71卷 062102-062102页

作者： W. T. Coffey D. S. F. Crothers Yu. P. Kalmykov P. M. Déjardin Department of Electronic and Electrical Engineering Trinity College Dublin 2 Ireland Department of Applied Mathematics and Theoretical Physics The Queens University of Belfast Belfast BT7 1NN Northern Ireland MEPS Université de Perpignan 52 Avenue Paul Alduy 66860 Perpignan Cedex France

It is shown how the existing theory of the dynamic Kerr effect and nonlinear dielectric relaxation based on the noninertial Brownian rotation of noninteracting rigid dipolar particles may be generalized to take into account interparticle interactions using the Maier-Saupe mean field potential. The results (available in simple closed form) suggest that the frequency dependent nonlinear response provides a method of measuring the Kramers escape rate (or in the analogous problem of magnetic relaxation of fine single domain ferromagnetic particles, the superparamagnetic relaxation time).

关键词： Dielectric relaxation

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A suggestion of multiple-access method for 4G-system

A suggestion of multiple-access method for 4G-system

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Elmar 2005 - 47th International Symposium Electronics in Marine

作者： Ziolko, Bartosz Ziolko, Mariusz Nowak, Michal Sypka, Przemyslaw Faculty of Electrical Engineering Automatics Computer Science and Electronics AGH University of Science and Technology al. Mickiewicza 30 30-059 Krakow Poland Department of Electronics AGH University of Science and Technology al. Mickiewicza 30 30-059 Krakow Poland Faculty of Applied Mathematics AGH University of Science and Technology al. Mickiewicza 30 30-059 Krakow Poland

Transmultiplexing as a method of multiple-access in 4G-system is suggested in this paper. Every existing linear method of multiple-access can be treated as a specific transmultiplexer. Moreover, transmultiplexing realizes the idea of intelligent network and reprogrammable electronic devices. The presented method uses perfect reversible integer-to-integer filter banks which have been attracting growing interest. Signals are then invertible in finite-precision arithmetics and map integers to integers. Due to this property, transmultiplexers of this type have important advantages: they can be applied for transmitting lossless compressed signals, minimal memory is needed and complexity of computations can be low.

关键词： Multiplexing

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Relationships between radar ambiguity and coding theory

Relationships between radar ambiguity and coding theory

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： S.D. Howard W. Moran A.R. Calderbank H.A. Schmitt C.O. Savage DSTO Edinburgh Australia Applied and Computational Mathematics Princeton University Princeton NJ USA Department of Electrical & Electronic Engineering University of Melbourne VIC Australia Raytheon Missile Systems Company Tucson AZ USA

We investigate the theory of the finite discrete Heisenberg-Weyl group in relation to the development of adaptive radar. We contend that this group can form the basis for the representation of the radar environment in terms of operators on the space of waveforms. We also demonstrate, following recent developments in the theory of error correcting codes, that the finite discrete Heisenberg-Weyl group provides a unified basis for the construction of useful waveforms/sequences for radar, communications and the theory of error correcting codes.

关键词： Radar theory Doppler radar Error correction codes Australia Spaceborne radar Switches Radar applications Chirp modulation mathematics Missiles

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An interconnected Markovian jump system and its decentralized observer-based control with sector nonlinearities

An interconnected Markovian jump system and its decentralize...

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International Conference on Control and Automation (ICCA)

作者： Xiaomei Zhang Yufan Zheng Guoping Lu Department of Applied Mathematics Nantong University Nantong China Department of Computer Science and Technology East China Normal University and Shanghai Nanoking Technology Company Shanghai China Department of Electrical and Electronics Engineering University of Melbourne VIC Australia College of Electronic Engineering Nantong University Nantong China

This paper works on the stochastic stabilization of an interconnected Markovian jump system. The stabilization is implemented by means of a decentralized observer-based output control with sector nonlinearities. The resulting closed-loop system tolerates some failures of control components and/or control saturation, etc. Based on Lyapunov method a sufficient condition of solvability for the problem is presented. An algorithm for designing of the observer-based output feedback controller is given in terms of linear matrix inequalities (LMIs).

关键词： Nonlinear control systems Control nonlinearities Control systems Stochastic systems Lyapunov method Sufficient conditions Algorithm design and analysis Output feedback Linear feedback control systems Linear matrix inequalities

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Design of integer filters for transmultiplexer perfect reconstruction

Design of integer filters for transmultiplexer perfect recon...

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13th European Signal Processing Conference, EUSIPCO 2005

作者： Ziólko, Bartosz Ziólko, Mariusz Nowak, Michal Faculty of Electrical Engineering Automatics Computer Science and Electronics AGH University of Science and Technology al. Mickiewicza 30 30-059 Kraków Poland Department of Electronics AGH University of Science and Technology al. Mickiewicza 30 30-059 Kraków Poland Faculty of Applied Mathematics AGH University of Science and Technology al. Mickiewicza 30 30-059 Kraków Poland

ISBN: (纸本)1604238216

A new and efficient method of designing the transmultiplexer filters is presented. The bilinear equations posed for the FIR filters are solved to achieve perfect reconstruction. For a given combining filter bank a separation filter bank can be developed by solving a set of algebraic equations. Some examples of a two-channel and four-channel transmultiplexer system are provided to illustrate the method of filter bank designing. Due to the incorporation of integer filters a perfect reconstruction was realized and crosstalk was completely eliminated not only theoretically but also in practice. Such transmultiplexers can be applied to coded signals transmission. It is pointed that the orthogonal filters can be obtained as well.

关键词： Filter banks

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Onset of synchronization in large networks of coupled oscillators

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Physical Review E 2005年第3期71卷 036151-036151页

作者： Juan G. Restrepo Edward Ott Brian R. Hunt Institute for Research in Electronics and Applied Physics University of Maryland College Park Maryland 20742 USA Department of Mathematics University of Maryland College Park Maryland 20742 USA Department of Physics and Department of Electrical and Computer Engineering University of Maryland College Park Maryland 20742 USA Institute for Physical Science and Technology University of Maryland College Park Maryland 20742 USA

We study the transition from incoherence to coherence in large networks of coupled phase oscillators. We present various approximations that describe the behavior of an appropriately defined order parameter past the transition and generalize recent results for the critical coupling strength. We find that, under appropriate conditions, the coupling strength at which the transition occurs is determined by the largest eigenvalue of the adjacency matrix. We show how, with an additional assumption, a mean-field approximation recently proposed is recovered from our results. We test our theory with numerical simulations and find that it describes the transition when our assumptions are satisfied. We find that our theory describes the transition well in situations in which the mean-field approximation fails. We study the finite-size effects caused by nodes with small degree and find that they cause the critical coupling strength to increase.

关键词： Oscillators (electronic)

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A practicable educational contents sharing system utilizing Knoppix Edu Series the 1 CD bootable Linux teaching tools

A practicable educational contents sharing system utilizing ...

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International Conference on Information Technology Based Higher Education and Training, ITHET

作者： A. Shikoda T. Ono M. Kumagai M. Ishikawa D. Chiba K. Suzaki K. Kato T. Hamada Department of Applied Physics and Informatics Tohoku Gakuin University Miyagi Japan Department of Electrical Engineering and Info. Tech Tohoku Gakuin University Japan Department of Mechanical Engineering Tohoku Gakuin University Japan Department of Civil and Environmental Engineering Tohoku Gakuin University Japan Alpha Systems Inc. Japan National Institute for Advanced Industrial Science and Technology Japan Uguisuzawa Technical High School Miyagi Pref Japan Department of Applied Mathematics Fukuoka University Japan

A practicable educational contents sharing system utilizing Knoppix Edu series is described. Knoppix Edu means "Knoppix for Education". Knoppix Edu is a customized version of original Knoppix by authors. Some cases applied to electronics engineering field's education in university and high schools are reported in this paper. Knoppix is a bootable Linux CD with a collection of so called open source software (OSS). Knoppix Edu itself has an automatic hardware detection system and supports for many devices and other peripherals. Since it is not necessary to install anything on a hard disk, low cost and high portability are expected. This is a great feature for educational use. The more important point is that customization and redistribution are permitted, therefore, every school or class can make their original Knoppix and share educational contents each other. By using this Knoppix Edu system, great advantages in academic education are confirmed and Inter-school educational contents sharing network could be established.

关键词： Linux Open source software Educational institutions Home computing Informatics Physics education Computer science education Application software Software maintenance Mechanical engineering

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Stabilization of chaos with FPIC: Application to ZAD-strategy buck converters

Stabilization of chaos with FPIC: Application to ZAD-strateg...

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作者： Angulo, Fabiola Fossas, Enric Ocampo, Carlos Olivar, Gerard Department of Electrical Electronic and Computer Science Universidad Nacional de Colombia Cra. 27 No. 64-60 Manizales Colombia Institute of Industrial and Control Engineering Technical University of Catalonia Avda. Diagonal 647 08027 Barcelona Spain Technical University of Catalonia Rambla Sant Nebridi 10 08222 Terrasa Spain Department of Applied Mathematics 4 Technical University of Catalonia Avda. Vctor Balaguer s/n E-08800 Vilanova i la Geltru Spain

ISBN: (纸本)008045108X

in this paper a new design for controlling dynamical systems has been applied to buck converters driven with a PWM centered pulse and (Zero Average Dynamics) ZAD-strategy. Chaotic operation has been stabilized with the so-called Fixed Point Induced Control (FPIC) technique. Also, the same converter with delay, whose 1-periodic orbit is always unstable, has been stabilized. Simulations are compared with the TDAS stabilization technique. Once a 1-periodic orbit has been stabilized, the dynamics shows the same characteristics and advantages of the ZAD design, such as robustness, fixed switching frequency (with zero average on the sliding surface) and a low output error. Copyright © 2005 IFAC.

关键词： Stabilization

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