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作者： Matušů, Radek Prokop, Roman Matejičková, Katarína Bakošová, Monika Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlín Nad Stráněmi 4511 76005 Zlín Czech Republic Department of Information Engineering and Process Control Faculty of Chemical and Food Technology Slovak University of Technology in Bratislava Radlinského 9 81237 Bratislava Slovakia

ISBN: (纸本)9789604741991

The contribution deals with design of continuous-time robustly stabilizing PI controllers for interval systems using the combination of Kronecker summation method, sixteen plant theorem and an algebraic approach to controller tuning. The effectiveness and practical applicability of the proposed method is demonstrated in control of a 3rd order nonlinear electronic plant.

关键词： Continuous time systems

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Wind energy penetration into distributed generation and its static and dynamic features

Wind energy penetration into distributed generation and its ...

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

作者： Peter Stumpf Rafael. K. Jardan Istvan Nagy Zoltan Varga Economics Department of Automation and Applied Informatics Budapest Budapest University of Technology Hungary MTA-BME Control Engineering Research Group Budapest

Wind Energy Conversion Systems (WECS) are penetrating into Microgrids as they fit well to the concept of Distributed Generation. The variable speed Doubly Fed Induction Generators (DFIG) are most frequently used. Changing the speed (DFIG) according to the aerodynamic law, maximum wind power can be harvested. The paper investigates the way of speed change by rotor voltage in steady-state and in transient. Steady state characteristics and simulation results for dynamic behavior are included.

关键词： Rotors Stators Generators Microgrids Wind turbines Wind energy Wind power generation

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How to Teach control System Optimization (A Practical Decompisition Approach for the Optimization of TDOF control Systems)

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IFAC-PapersOnLine 2019年第9期52卷 115-120页

作者： Cs. Bányász L. Keviczky R. Bars Institute for Computer Science and Control of the Hungarian Academy of Sciences Department of Automation and Applied Informatics Budapest University of Technology and Economics H-1111 Budapest Kende u 13-17 Hungary

The optimality in a generic two-degree of freedom control system can be decomposed into three major steps, because the control error has three major parts: design-, realizability- and modeling-loss. The second term can be made zero for inverse stable processes only. This decomposition opens new ways for practical optimization of two-degree-of-freedom ( TDOF ) systems and helps the construction of new algorithms for robust identification and control. It is more reasonable to teach the optimization of control systems using these components.

关键词： two-degree-of-freedom control systems performance robustness optimality

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Modelling of Raw Hide One-Stage Washing Process

Modelling of Raw Hide One-Stage Washing Process

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2015 International Conference on Environmental Science and Energy Engineering(ICESEE 2015)

作者： Dagmar JANACOVA Karel KOLOMAZNIK Pavel MOKREJS Vladimir VASEK Ondrej LISKA Antonin BLAHA Miloslav FIALKA Department of Automation and Control Engineering Faculty of Applied Informatics Faculty of Technology Tomas Bata University in Zlín Technical University of Ko?ice

In the last years increased application of automatic control systems in tannery *** system consists mostly in the control of equipment and metering of chemicals,according to a predetermined programme.A qualitatively higher degree of automatic control is the application of closed loop control,involving active interferences based on measured parameters of the process in *** of the ways how to achieve this is adequate technical equipment and application of control algorithms,derived from the mathematical model of the given process and his physical *** first task was the design of such *** case of raw hide washing such models are of diffusion type,describing protective component transport or models describing protective solution on the *** solution and practical verification was made under laboratory and industrial *** design or control algorithms should equally give answer to the question what is the main purpose of *** could be *** of satisfactory good quality semiproduct,environmental protection,minimization of operating costs because reduced water consumption cannot compensate the long operation time connected with power *** focused on part of soaking process—washing.

关键词： Washing Raw hide Mathematical modelling Optimization Process control

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Comparison of two sampling techniques of SVM applied in sensorless Field Oriented controlled IM drive

Comparison of two sampling techniques of SVM applied in sens...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Péter Stumpf Rafael K. Járdán István Nagy István Vajk Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary MTA-BME Control Engineering Research Group Budapest Hungary

ISBN: (纸本)9781479924004

Field Oriented control (FOC) technique is one of the mostly applied algorithm to control the speed and the flux of a three-phase electric drive. The paper focuses on high speed or high-pole count motor FOC drives when both the sampling over reference frequency ratio F and the carrier over reference frequency m f is low. The paper presents that the stability range of a speed sensor-less FOC motor drive can be extended by recalculating the reference signal of the Space Vector Modulation (SVM) algorithm at the negative peak of the carrier signal as well by approximating the rotor flux angle change over one half carrier period. The result was verified by computer simulations and laboratory measurements.

关键词： Torque Support vector machines Current measurement Resistors Stators Pulse width modulation Torque measurement

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Comparative study of ultrahigh-speed induction generators with self-excitation

Comparative study of ultrahigh-speed induction generators wi...

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Mediterranean Conference on control and automation (MED)

作者： R. K. Jardan Z. Varga I. Nagy Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary MTA-BME Control Engineering Research Group Budapest Hungary

ISBN: (纸本)9781479959020

In the paper a comparative analysis is carried out on seven different self-excitation methods that have been developed in the past decades taking into account the technical and economical features of the methods compared. A novel solution based on resonant circuit application is described in more detail, and the theoretical considerations have been confirmed by computer simulations and laboratory test results.

关键词： Reactive power Inductors Topology Stators Capacitance Switches

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control of periodically time-varying systems with delay: An algebraic approach vs. modified Smith predictors

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WSEAS Transactions on Systems 2010年第6期9卷 689-702页

作者： Matušů, Radek Prokop, Roman Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlín Nad Stránìmi 4511 76005 Zlín Czech Republic

The paper deals with comparison of different continuous-time strategies applied to control of singleinput single-output (SISO) periodically time-varying systems with delay. The first method is based on the fractional representation in the ring of proper and stable rational functions (RPS), general solutions of Diophantine equations and conditions of divisibility while the other two methods use the modified Smith predictor structures in combination with standard forms for minimum of integral squared time error (ISTE) or design by Coefficient Diagram Method (CDM). The capabilities of all techniques are demonstrated on simulative examples for first and second order periodically time-varying time-delay systems. Moreover, various modifications and improvements, such as control structure with more degrees of freedom or utilization of disturbance controller are also included in the research.

关键词： Time delay

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Comparison of cluster validation methods

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WSEAS Transactions on Information Science and Applications 2006年第3期3卷 502-509页

作者： Legány, Csaba Juhász, Sándor Babos, Attila Department of Automation and Applied Informatics HAS-BUTE Control Research Group Budapest University of Technology and Economics 1111 Goldmann Gy. ter 3. Budapest Hungary

The main goal of clustering is to partition the elements of a large dataset into separate groups in an unsupervised way. The creation of groups is based on the similarity of objects that is objects with similar properties are kept together while significantly different objects are assigned to different groups. Various algorithms exist that can prove to be efficient in different situations. These algorithms produce different results depending on their structure, on their initial parameters and on the nature of the data being analyzed. This paper focuses on the different techniques developed for evaluating the behavior of the algorithms from the point of view of clustering quality. It is difficult to define when a clustering is appropriate, sometimes even for a human observer. The high number of dimensions, the possibility of arbitrary shaped and overlapping clusters further increase the complexity of the situation. In this paper the most commonly used approaches are introduced and explained, after they are compared based on experimental results.

关键词： Data mining

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Raman microscopic measurement of materials used on banknotes

Raman microscopic measurement of materials used on banknotes

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Circuits, Systems, Communications and Computers (CSCC), International Conference on

作者： Hana Tomášková Vladimír Vašek Department of electronic and measurements Faculty of Applied informatics Tomas Bata University in Zlin Zlín Czech Republic Department of automation and control engineering Faculty of Applied informatics Tomas Bata University in Zlin Zlín Czech Republic

ISBN: (纸本)9781665481878

The successful verification of the authenticity of banknotes, or the detection of counterfeits, is based on the combination of an effective measuring system and computer technology. In this paper, a modern diagnostic method Raman microscopy together with an exploratory tool for processing and interpreting multi-dimensional datasets, and cluster analysis, are used to study structural differences between paper and orange ink used on genuine banknotes. Six currencies of European countries were selected for this study: Croatian kuna, Czech crown, euro, Great British Pound, Polish zloty, and Swiss franc. Raman microscopy offers non-destructive, rapid analysis without any sample preparation and pre-processing, with the potential to recognize structural modification of substances, together with the advantages of optical microscopy. Cotton fibres, $\text{TiO}_{2}$ in two different modifications, and other additives are successfully identified within the spectra. The patterns found in mathematically processed Raman data, especially between the paper, indicate both, the similarities and differences across the various banknotes, even of the same currency. The results serve as a base of the spectral database for authenticity control of banknotes and classification of the materials used.

关键词： Optical fibers Optical microscopy Databases Statistical analysis Microscopy Process control Ink

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PD-tree: A new approach to subtree discovery

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WSEAS Transactions on Information Science and Applications 2005年第11期2卷 1772-1779页

作者： Ivancsy, Renata Vajk, Istvan Department of Automation and Applied Informatics HAS-BUTE Control Research Group Budapest University of Technology and Economics 1111 Goldmann Gy. ter 3. Budapest Hungary

Discovering frequent patterns in semi-structured and structured data is a new trend in the data mining community. The motivation for discovering such types of patterns can be understood when investigating the real world problems. Several problems can be modeled only with structural data like graphs rather than with flat transactions. Thus the research directions must adjust to the requirements of these new kinds of problems. Frequent tree mining is a special part of frequent graph mining as trees are special graphs. Trees can model several real world problems such as handling XML documents or WEB navigation patterns, furthermore, trees can be handled easier than general graphs. Thus discovering frequent trees has justification. In this paper a novel approach is proposed for efficiently discovering frequent tree-like patterns in tree databases. The new algorithm presented in this paper is a level-wise, "candidate generate and test" algorithm. The main contribution of the new approach is to use pushdown automatons for subtree inclusion testing. In order to enhance the performance of counting the support of the candidate trees, the several automatons are joined such that only one stack is needed for handling the joined automatons. The advantage of the new method is that is has to read the items of the input exactly once while the support of all the candidates is determined.

关键词： Data mining

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