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Lecture Notes in control and Information Sciences 2009年 396卷 103-112页

作者： Tar, József K. Rudas, Imre J. Nádai, László Kozlowski, Krzysztof R. MacHado, José A. Tenreiro Institute of Intelligent Engineering Systems John von Neumann Faculty of Informatics Budapest Tech Bécsi út 96/B Budapest H-1034 Hungary Computer and Automation Research Institute Hungarian Academy of Sciences Kende u. 13-17 Budapest H-1111 Hungary Chair of Control and Systems Engineering Poznań University of Technology ul. Piotrowo 3a Poznań 60-965 Poland Department of Electrotechnical Engineering Institute of Engineering of Porto Rua Dr. Antonio Bernardino de Almeida Porto 4200-072 Portugal

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Single-phase optimal odd PWM problem

Single-phase optimal odd PWM problem

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34th Annual Conference of the IEEE Industrial Electronics Society, IECON 2008

作者： Kujan, Petr Hromcík, Martin Šebek, Michael Department of Control Engineering FEE Czech Technical University in Prague Institute of Information Theory and Automation of the ASCR Czech Republic Center for Applied Cybernetics Faculty of Electrical Engineering Czech Technical University in Prague Czech Republic Department of Control Engineering Faculty of Electrical Engineering Czech Technical University in Prague Czech Republic

ISBN: (纸本)9781424417667

Optimal pulse width modulation (PWM) problem is an established method of generating PWM waveforms with low baseband distortion. In this paper we focused on computation of optimal switching angles of a odd PWM waveform for generating general odd symmetric waveforms. We introduce an exact and fast algorithm with the complexity of only O(n log2 n) arithmetic operations. This algorithm is based on transformation of appropriate trigonometric equations for each harmonics to a polynomial system of equations that is transferred to a special system of sum of powers. The solution of this system is carried out by modification of Newton's identity via Padéapproximation and orthogonal polynomials theory and property of symmetric polynomials. Finally, the optimal switching sequence is obtained by computing the zeros of two orthogonal polynomials in one variable. © 2008 IEEE.

关键词： Pulse width modulation

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Design and implementation of portable data acquisition unit in process control and supervision applications

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WSEAS Transactions on Systems and control 2008年第8期3卷 779-788页

作者： Dostálek, Petr Vašek, Vladimír Dolinay, Jan Department of Automation and Control Engineering Tomas Bata University in Zlín Faculty of Applied Informatics Nad Stráněmi 4511 760 05 Zlín Czech Republic

Paper deals with design and implementation of portable data acquisition unit based on 8-bit microcontroller Freescale 68HC908GP32 in process control and supervision applications. Its hardware design is adopted to fulfill high reliability and immunity against industrial environment, high precision and compact dimensions. Communication with supervision system is performed via standard RS232 interface utilizing universal ASCII-based communication protocol which is supported by number of software environments. In order to improve development of new software applications with this device a support program libraries for Visual C++, control Web and Matlab/Simulink was created. Correct function of the data acquisition device and support software libraries were tested on educational model of heating plant with time delay in Matlab 6.5 and control Web environments.

关键词： Data acquisition

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Single-Parameter Tuning of PI controllers: From Theory to Practice

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IFAC Proceedings Volumes 2008年第2期41卷 4964-4969页

作者： Radek Matušů Roman Prokop Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlín Nad Stráněmi 4511 760 05 Zlín Czech Republic Tel: +420 57 603 3015 Fax: +420 57 603 5279

The paper deals with influence of a single scalar positive tuning parameter on performance properties of the closed control loop which contains algebraically designed PI controller while the response quality is evaluated by the size of first under- or overshoots. The controller coefficients are calculated from general solutions of diophantine equations in the ring of proper and Hurwitz stable rational functions. Subsequently, these controllers can be tuned by the only parameter. The contribution brings simple tuning rules and, moreover, it presents their possible practical application during control of real laboratory model assumed as system with parametric uncertainty.

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Single-phase optimal Odd PWM problem

Single-phase optimal Odd PWM problem

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Annual Conference of Industrial Electronics Society

作者： Petr Kujan Martin Hromcik Michael Sebek Department of Control Engineering FEEInstitute of Information Theory and Automation of the ASCR Czech Technical University of Prague Center for Applied Cybernetics Faculty of Electrical Engineering Czech Technical University of Prague Department of Control Engineering Faculty of Electrical Engineering Czech Technical University of Prague

Optimal pulse width modulation (PWM) problem is an established method of generating PWM waveforms with low baseband distortion. In this paper we focused on computation of optimal switching angles of a odd PWM waveform for generating general odd symmetric waveforms. We introduce an exact and fast algorithm with the complexity of only O(n log 2 n) arithmetic operations. This algorithm is based on transformation of appropriate trigonometric equations for each harmonics to a polynomial system of equations that is transferred to a special system of sum of powers. The solution of this system is carried out by modification of Newtonpsilas identity via Pade approximation and orthogonal polynomials theory and property of symmetric polynomials. Finally, the optimal switching sequence is obtained by computing the zeros of two orthogonal polynomials in one variable.

关键词： Pulse width modulation Polynomials Baseband Equations Power harmonic filters Chebyshev approximation control engineering Space vector pulse width modulation Pulse generation Pulse width modulation inverters

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First Experience of the control System of HVAC Based on KNX Fieldbus applied in Intelligent Buildings Laboratory

First Experience of the Control System of HVAC Based on KNX ...

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The First International Conference on Building Energy and Environment

作者： Martin Zalesak Petr Polach Tomas Bata University in Zlín Faculty of Applied InformaticsDepartment of Automation and Control EngineeringNad Stráněmi 4511 760 05 ZlínCzech Republic Brno University of Technology Faculty of Electrical Engineering and CommunicationDepartment of Control and InstrumentationKolejní 4612 00 BrnoCzech Republic

A new multipurpose laboratory of building technology has been built in Tomas Bata University, faculty of applied informatics and set into test operation. The laboratory supports several subjects like modern HVAC system applications, with renewable sources of energy implemented (solar collectors and reversible heat pump application), and a comprehensive system of control, based on the open bus communication system KNX , communication gate based on the TCP/IP protocol. The laboratory is as well equipped as a training tool for control systems based on bus communication particularly KNX (finished) and LONWORKS and BACNET (under construction). The paper describes the first results achieved by the laboratory.

关键词： Intelligent buildings, Building automation, System integration, Laboratory, Thermal modeling

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Subspace identification methods and fMRI analysis

Subspace identification methods and fMRI analysis

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Jana Tauchmanova Martin Hromcik Department of Control Engineering Faculty of Electrical Engineering Institute of Information Theory and Automation Czech Technical University Prague Czech Republic Center for Applied Cybernetics Faculty of Electrical Engineering Institute of Information Theory and Automation Czech Technical University Prague Czech Republic

The main goal of this paper is to propose application of modern multidimensional systems identification algorithms of the subspace identification theory in the context of fMRI data analysis. The methods originated in 1990s in the field of process control and identification and yield robust linear model parameter estimates for systems with many inputs, outputs and states. Our ultimate goal is to establish an alternative to the DCM analysis procedure which would eliminate its main drawbacks, namely the need to pre-define the models structure. The paper discusses results based on simulated data provided by the DCM simulator in the SPM toolbox. Several scenarios are presented, with varying amount of noise and number of data samples.

关键词： Data models Functional magnetic resonance imaging Brain modeling Signal to noise ratio Analytical models Mathematical model Process control

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The development of ultrasonic drilling device

The development of ultrasonic drilling device

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International Symposium on applied Machine Intelligence and informatics (SAMI)

作者： Shingo Takahasi Peter Korondi Barna Resko Yasuharu Kunii Department of Automation and Applied Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Faculty of Electrical and Electronic Engineering Chuo University Kasugai Tokyo Japan

For a planetary surface exploration, grinding and drilling equipment is one of the mo st important devices in geological observation of sampled rocks. However, the equipment can't be directly applied for works in the space. More specifically, the weight of drilling and grinding machines generally used on the Earth is so heavy, an d they need lubricant. Therefore it is difficult to use them in the space. In this paper, we analyze transient process of destroyed surface of rocks. Especially, we focus on contact points between sampled rocks and the top of a horn. Through the analysis, we can suggest that a ultra sonic based device is effective to implement drilling and grinding of rocks in the space. The analysis suggests that a ultra sonic based device is effective to realize drilling and grinding of rocks in the space.

关键词： Drilling Vehicles Soil Geology Probes Moon informatics Planets Heating automation

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Pole placement approaches for linear and fuzzy systems

Pole placement approaches for linear and fuzzy systems

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International Symposium on Intelligent Systems and informatics (SISY)

作者： S. Preitl R.-E. Precup P. A. Clep I.-B. Ursache J. Fodor I. Skrjanc Department of Automation and Applied Informatics Polytechnic슠University of Timisoara Timisoara Romania Institute of Intelligent Engineering Systems Budapest Tech Polytechnical Institution Budapest Hungary Laboratory of Modelling Simulation and Control University of Ljubljana Ljubljana Slovenia

The paper investigates several pole placement methods in the linear case and suggests a new pole placement method by means of fuzzy linear equations. The linear methods concern the constant real part poles, the poles places on a circle, Butterworth configurations without and with the correction of the imaginary part, the pole-zero cancellation, and the poles placed on an ellipse. Low order systems are considered. The pole placement methods are compared by the digital simulation of control systemspsila behaviors with respect to the modification of the reference input. The conclusions are useful for continuous control systems, and they can be extended easily to digital control systems including quasi-continuous ones.

关键词： State feedback Fuzzy systems control systems Equations Poles and zeros control system synthesis Stability Digital control Nonlinear control systems automation

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Photovoltaic/Thermal System for Stand-Alone Operation

Photovoltaic/Thermal System for Stand-Alone Operation

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39th IEEE Power Electronics Specialists Conference (PESC 2008), vol.9

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 University of Technology and Economics Budapest Hungary Department of Electrical Electronic and Automatic Control Engineering University Rovira i Virgili Tarragona Spain

The growing demand for the utilization of clean energy resources requires consideration of more efficient and economical ways in the usage of available resources and technologies. In the field of solar energy both the efficiency and the economics, i.e. the payback times are crucial questions for a more widespread application of this resource in the future. A novel solution and system are proposed in the paper aimed at enhancing the amount of energy that can be harvested from solar radiation in the same area. The basis of the method presented is a special construction of combined Photovoltaic/Thermal panels that can generate heat power to produce hot water, while the photovoltaic part provides electric power for covering the electric power consumption of loads, to supply its own electronic control units and to operate pump drives etc. The theoretical predictions of the electric part of the system are confirmed by laboratory test results. The system and the overall control structure, including the MPPT control, are presented assuming stand-alone operation but parallel operation is also possible.

关键词： Temperature measurement Resistance heating Construction industry Batteries Converters Capacitors Heat transfer

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