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2nd IFAC Conference on control Systems Design, CSD 2003

作者： Haber, R. Schmitz, U. Bars, R. Department of Plant and Process Engineering Laboratory of Process Control University of Applied Science Cologne Betzdorfer Str. 2 KolnD-50679 Germany Department of Automation and Applied Informatics Budapest University of Technology and Economics Goldmann Gy. ter 3 BudapestH-1111 Hungary

For predictive control in industry often very long horizons for control error and manipulated signal are used because of the slow processes which take place in the petrochemical industry. In order to reduce the computational effort some commercial predictive control program packages offer the ability to reduce the number of points in both horizons but do not recommend how to select the points which have to be considered in the horizon of the control error and manipulated variable. in this work the authors introduce an optimal choice not only of the horizon lengths itself but also for the strategy of reducing the number of points in the horizons. A genetic optimization algorithm was used both for the search for the optimal length of the horizons and for the best allocation of the points in the horizons. The results of the optimization process where used to deduct a simple rule. © 2003 IFAC.

关键词： Genetic algorithms

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COVARIANCE MATCHING CRITERIA IN EIV IDENTIFICATION

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IFAC Proceedings Volumes 2006年第1期39卷 184-189页

作者： István Vajk Jen Hetthéssy Department of Automation and Applied Informatics Budapest University of Technology and Economics HAS-BUTE Control Research Group H 1521 Budapest Hungary

The paper deals with the simultaneous estimation of the process and noise parameters in linear dynamic errors-in-variables models. The presented method is based on the minimization of loss functions to estimate all the parameters in the EIV model. The related loss functions involve Hankel matrices built up by the noisy input-output observations, as well as error covariance matrices taking the assumptions made for the noisy environment into consideration. The theoretical results are verified by simulation examples.

关键词： Linear models errors-in-variables models system identification subspace methods

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Fractal approach to automation of conceptual design of control systems' elements for power engineering

Fractal approach to automation of conceptual design of contr...

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2021 International Conference on Electrotechnical Complexes and Systems, ICOECS 2021

作者： Shikulskaya, Olga Shikulskiy, Mikhail Abuova, Galina Urumbaeva, Olga Astrakhan State University of Architecture and Civil Engineering Fire Safety and Water Use Department Astrakhan Russia Astrakhan State Technical University Department of Applied Informatics in Economics Astrakhan Russia Astrakhan State Technical University Automation and Control Department Astrakhan Russia

ISBN: (纸本)9781665407274

Need of use of computer technology for conceptual design of control systems' elements for electric power system was proved. The known approaches to the solution of this task are analysed and need of their development is proved. New approach to conceptual design of control systems' elements on the basis of the fractal theory is observed. Two types of self-similarity for functional fractals were defined: rigid and non-rigid self-similarity. Use of this approach allows to model sensors of new generation, in particular, multiifunctional sensors. © 2021 IEEE.

关键词： Conceptual design

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Pneumatic muscle-based actuator for industrial robotic applications 7

Pneumatic muscle-based actuator for industrial robotic appli...

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2017 7th International Workshop on Computer Science and Engineering, WCSE 2017

作者： Pitel, Ján Líška, Ondrej Janáčová, Dagmar Technical University of Kosice Faculty of Manufacturing Technologies Department of Industrial Engineering and Informatics Bayerova 1 Prešov080 01 Slovakia Technical University of Kosice Faculty of Mechanical Engineering Department of Automation Control and Human-Machine Interaction Letná 9 Košice042 00 Slovakia Tomas Bata University in Zlin Faculty of Applied Informatics Department of Automation and Control Engineering Nad Stráněmi 4511 Zlín760 05 Czech Republic

ISBN: (纸本)9789811136719

The outstanding feature of the pneumatic artificial muscle is its high power to weight ratio vastly outperforming both pneumatic cylinder and DC motor. This feature is very important for using of pneumatic muscle-based actuators in industrial robotic systems where high forces and stiffness of mechanism are often required. The most common so far produced and used type of pneumatic artificial muscle is McKibben muscle and it is now made commercially available by different companies (e.g. Festo). In the paper there are described some of its characteristics and principles of control important for using as actuator for industrial robotic applications.

关键词： Pneumatic actuators

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Non-stepwise reference tracking for time delay systems

Non-stepwise reference tracking for time delay systems

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International Carpathian control Conference (ICCC)

作者： Libor Pekař Roman Prokop Petr Dostálek Department of Automation and Control Faculty of Applied Informatics Tomas Bata University in Zlín Czech Republic

This paper is focused on reference tracking and disturbance rejection for linear time-invariant time delay systems. The contribution is motivated by the fact that the task of reference tracking and disturbance rejection for non-stepwise those external inputs in the feedback loop is often ignored in the literature. The presented approach is based on algebraic operations in a special ring RMS and on the divisibility condition in the ring. The general idea for a feedback loop with two controllers is introduced. The methodology is clarified and verified by a simulation example in the Matlab/Simulink environment.

关键词： control systems Equations Delay Transfer functions Mathematical model Feedback loop Stability analysis

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Identification Methods in a Unified Framework

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IFAC Proceedings Volumes 2003年第16期36卷 1975-1980页

作者： István Vajk Department of Automation and Applied informatics Budapest University of Technology and Economics and HAS-BUTE Control Research Group H-1521 Budapest. Hungary

The paper derives a framework suitable to discuss the errors-in-variables (EIV) and the maximum likelihood (ML) estimation algorithms to estimate linear system parameters in a unified way. Using the capability of the unified approach a new parameter estimation algorithm is presented offering flexibility to ensure acceptable variance in the estimated parameters. The developed algorithm is based on the application of Hankel matrices of variable size and can be considered as an extended version of the EIV method.

关键词： Errors-in-variables linear systems maximum likelihood estimation system identification subspace methods

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An Application for Solving Truth Functions 9th

An Application for Solving Truth Functions

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9th Computer Science On-line Conference, CSOC 2020

作者： Pokorný, Pavel Ševčík, Daniel Department of Computer and Communication Systems Faculty of Applied Informatics Tomas Bata University in Zlín Nad Stráněmi 4511 Zlín760 05 Czech Republic Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlín Nad Stráněmi 4511 Zlín760 05 Czech Republic

ISBN: (纸本)9783030519643

Nowadays, many technical devices are controlled by logic circuits. These circuits evaluate the situation based on the proposed truth functions, which they then use to perform one of the defined actions. In line with the increasing complexity of individual technical devices, the logic circuits and truth functions are also increasingly complex. For this reason, it makes sense to minimise these functions since they can thereby achieve a simpler technological process and the higher reliability of whole logic systems. This paper describes the Karnaugh Studio application, which resolves the minimisation of these truth functions - and was developed at our faculty (FAI, TBU in Zlín). The minimisation is performed using the Karnaugh Map Method - with support for up to eight variables on input. The application is based on the C++ programming language and the Dear ImGui and Magick++ libraries. Its functionality has been verified on a number of examples. This proved its applicability and ability to be used in the solution of logic circuits in industrial practice. © 2020, Springer Nature Switzerland AG.

关键词： Boolean functions

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Nonlinear process identification and predictive control by multi-parameter models 6

Nonlinear process identification and predictive control by m...

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6th IFAC Symposium on Nonlinear control Systems, NOLCOS 2004

作者： Schmttz, U. Haber, R. Bars, R. Department of Plant and Chemical Process Engineering Laboratory of Process Control University of Applied Science Cologne Betzdorfer Str. 2 KölnD-50679 Germany Department of Automation and Applied Informatics Budapest University of Technology and Economics Goldmann Gy. ter 3 BudapestH-1111 Hungary

According to the multi-model approach a nonlinear dynamical process is approximated in different working points by local valid linear models. The global valid model output is calculated as the weighted sum of the sub-model outputs. The parameters of the Gaussian weighting function can be chosen by optimization. The computation time can be reduced if instead of the model outputs the parameters (for example static gain and time constant) of the local valid models are merged. The global valid nonlinear model can be used e.g., for model based predictive control. The new, multi-parameter method is illustrated by a heat exchanger example. Copyright © 2004 IEAC.

关键词： Heat exchangers

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Up to Date Issues on Modeling the Nervous control of the Cardiovascular System on Short-Term

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IFAC Proceedings Volumes 2011年第1期44卷 3747-3752页

作者： Alexandru Codrean Adrian Korodi Toma-Leonida Dragomir Levente Kovács Automation and Applied Informatics Department “Politehnica” University of Timisoara Timisoara Romania Department of Control Engineering and Information Technology Budapest University of Technology and Economics Budapest Hungary

Abstract Physiological control mechanisms are receiving an increasing amount of attention due to their primary role in homeostasis, while systems theory is becoming an indispensable tool for understanding the dynamic behaviors that emerge. In this context, a topic that has been intensively studied is the nervous control of the cardiovascular system on short term. This paper tries to develop a common framework for future efforts in modeling the nervous control of the cardiovascular system in orthostatic stress, through a systemic analyze of the roles and interactions of the regulatory mechanisms identified in the literature.

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Internal model-based controller for a solar plant 15th

Internal model-based controller for a solar plant

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15th World Congress of the International Federation of Automatic control, 2002

作者： Farkas, István Vajk, István Department of Physics and Process Control Szent István University Pater K. u. 1. GödöllöH-2103 Hungary Department of Automation and Applied Informatics Budapest University of Technology and Economics BudapestH-1521 Hungary

ISBN: (纸本)9783902661746

In this study a model-based control designed for the operation of a solar power plant is discussed. The simplified physically based model of the plant was developed on the basis of the energy balances including the solar insulation as an input, the heat transferred by the flow of the oil as a working media and the overall heat loss from the plant. The outlet temperature of the collector field is the reference/set-point value while the volumetric flow rate of the oil is the manipulating variable to the controller. The solar radiation, the ambient temperature and the inlet oil temperature to the collector field are assumed as the disturbances. The model developed and identified is an internal part of the controller. The initial control experimental results are also presented. Copyright © 2002 IFAC.

关键词： controllers

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