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23rd International Conference on Circuits, Systems, Communications and Computers, CSCC 2019

作者： MacKů, Lubomír Department of Process Control Faculty of Applied Informatics Tomas Bata University in Zlin nám. T. G. Masaryka 5555 Zlín760 01 Czech Republic

An alternative method of determining exothermic reactor model parameters which include first order reaction rate constant is described in this paper. The method is based on known in reactor temperature development and is suitable for processes with changing quality of input substances. This method allows us to evaluate the reaction substances composition change and is also capable of the reaction rate constant (parameters of the Arrhenius equation) determination. Method can be used in exothermic batch or semi-batch reactors running processes based on the first order reaction. An example of such process is given here and the problem is shown on its mathematical model with the help of simulations. © 2019 The Authors, published by EDP Sciences.

关键词： Rate constants

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Preliminary Signal Filtering in Self-excited Acoustical System for Stress Change Measurement

Preliminary Signal Filtering in Self-excited Acoustical Syst...

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第三十二届中国控制会议

作者： DOMINIK Ireneusz KWANIEWSKI Janusz Lalik Krzysztof DWORNICKA Renata AGH University of Science and Technology Department of Process Control Cracow University of Technology Institute of Applied Informatics

The article describes the implementation of low pass Buttherworth digital filter in Self-Excited Acoustical System for measurement of stress changes in mechanical constructions and rock masses. The Self-excited Acoustical System (SAS) is a kind of a self-oscillating system, which uses the auto-resonance phenomena for measurement of construction stress changes. The essence of the SAS system is to use a vibration exciter and vibration receiver placed at a distance with a positive feedback, which causes the excitation of the system. Stress changes manifest themselves in small but detectable variations of frequency. This phenomenon can be used to indirectly measure stress changes in the material. One of the main problem of this innovating system is quality of the measured noised signals, which is difficult to interpret. To enhance the self-excited system performance the preliminary signal filtrating is introduced.

关键词： self-excited systems, stress monitoring, feedback system

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applied continuous - time self - tuning control

Applied continuous - time self - tuning control

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Mediterranean Conference on control and Automation (MED)

作者： Marek Kubalcik Vladimir Bobal Department of Process Control Faculty of Applied Informatics Tomas Bata University Zlin Zlin Czech Republic

One approach to a recursive identification of continuous - time systems was implemented in self - tuning control of a system of interconnected tanks. Since derivatives of input and output variables of continuous - time systems can not be directly measured, differential filters and filtered variables are established to substitute primary variables. The filtered variables are then used in a recursive identification procedure where the classical recursive least squares method is used to identify the system. Results of real - time experiments are compared to results obtained with an analogical discrete controller.

关键词： Polynomials Mathematical model Tuning control systems Vectors process control

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Optimizing settling-time and overshoot of a controlled variable by a direct method

Optimizing settling-time and overshoot of a controlled varia...

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Mediterranean Conference on control and Automation (MED)

作者： Frantisek Gazdos Petr Dostal Radek Pelikan Department of Process Control Faculty of Applied Informatics Tomas Bata University Zlin Zlin Czech Republic

The paper presents a new approach to tuning a control loop. It uses a gradual iterative way to adapt settling- time and overshoot of a controlled variable. The algorithm exploits the virtual reference feedback tuning methodology - a direct method for controller design. Results are demonstrated using simulation experiments on a system from a test batch of models suitable for control purposes.

关键词： Automation Conferences

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Simulation control of Three-Tank-System Using 2DOF controller 3rd

Simulation Control of Three-Tank-System Using 2DOF Controlle...

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3rd International Conference on Innovation in Engineering, ICIE 2024

作者： Kubalcik, Marek Barot, Tomas Department of Process Control Faculty of Applied Informatics Tomas Bata University Nad Stráněmi 4511 Zlín76005 Czech Republic Department of Mathematics With Didactics Faculty of Education University of Ostrava Mlynska 5 Ostrava70103 Czech Republic

ISBN: (纸本)9783031615740

The paper proposes an implementation of a 2DOF controller based on polynomial methods for control of a system of three serially connected tanks. A state-space model of the three-tank-system was figured out according to physical laws. Then an appropriate linear input-output model was computed from the state-space model. This model is related to the prime model, although it has a different structure. It can therefore be assumed that it describes the main properties of the controlled system in the same way as the prime model. The input-output model was then applied for design of the 2DOF controller. The system of three interconnected tanks has a nonlinear character and uncertain parameters. A description of its dynamical properties with the use of a linear model is appropriate just in a vicinity of a certain working point. The controller was then realized in an adaptive version with a recursive identification of an input-output model appropriate to the state-space model which was realized in Simulink environment and used for verification of the controller by simulation. Simulation results are also included in the paper. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： controllers

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Predictive control of non-minimum phase systems

Predictive control of non-minimum phase systems

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International Carpathian control Conference (ICCC)

作者： Tomáš Barot Marek Kubalčik Department of Process Control Tomas Bata University in Zlín Faculty of Applied Informatics Zlin Czech Republic

A predictive controller is a modern type of a regulator which is appropriate for many characters of processes. Non-minimum phase systems contain an undershoot in the initial part of its dynamic behaviour. The traditional approach in predictive control of non-minimum phase systems is based on increasing of the minimum prediction horizon. This method may not be always absolutely effective. In this paper there is proposed an approach which is based on manipulating with constraints in an optimization subsystem. In the paper are also evaluated simulation results.

关键词： Decision support systems

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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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Self-tuning control of nonlinear servo system: Comparison of LQ and predictive approach

Self-tuning control of nonlinear servo system: Comparison of...

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Mediterranean Conference on control and Automation (MED)

作者： V. Bobal M. Kubalcik P. Chalupa P. Dostal Faculty of Applied Informatics Department of Process Control Tomas Bata University in Zlín Zlin Czech Republic

The majority of processes met in the industrial practice have stochastic characteristics and eventually they embody nonlinear behaviour. Traditional controllers with fixed parameters are often unsuitable for such processes because their parameters change. The changes of process parameters are caused by changes in the manufacturing process, in the nature of the input materials, fuel, machinery use (wear) etc. Fixed controllers cannot deal with this. One possible alternative for improving the quality of control for such processes is the use of adaptive control systems. Different approaches were proposed and utilized. One successful approach is represented by self-tuning controller (STC). This approach is also called system with indirect adaptation (with direct identification). The main idea of an STC is based on the combination of a recursive identification procedure and a selected controller synthesis. In this paper, the standard STC (non-predictive) approach is verified and compared with STC based on the Model Predictive control (MPC). The verification of both methods was implemented by the real-time control of a highly nonlinear laboratory model, the DR300 Speed control with Variable Load.

关键词： Nonlinear control systems control systems Servomechanisms Electrical equipment industry Fuel processing industries Manufacturing industries Stochastic processes Manufacturing processes Machinery process control

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USAGE OF BORIS ENVIRONMENT FOR control OF REAL-TIME LABORATORY MODEL

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IFAC Proceedings Volumes 2006年第6期39卷 88-93页

作者： Petr Chalupa Bata University in Zlin Faculty of Applied Informatics Department of Process Control Centre of Applied Cybernetics Nad Stránêmi 4511 760 01 Zlín Czech Republic

The paper deals with the usage of a BORIS control and simulation environment for the identification and control of a real-time laboratory model. Identification and control experiments were performed using Gas Flow control model by Leybold. This model is a part of a Real-time Models Laboratory at Tomas Bata University in Zlin. The aim of this paper is to introduce an experiment performed using the BORIS environment and explore usability of this environment for the real-time control. Interoperability and comparison with the well-known MATLAB/Simulink environment is also discussed.

关键词： Real-time computer systems Computer-aided control system design Educational aids PID control Identification

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Robust Proportional-Integral control of a laboratory model using Programmable Logic controller SIMATIC S7-300

Robust Proportional-Integral control of a laboratory model u...

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6th IFAC Symposium on Robust control Design, ROCOND'09

作者： Matušů, Radek Vaneková, Katarína Prokop, Roman 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)9783902661456

The main aim of the contribution is to present a possible approach to design of simple Proportional-Integral (PI) robust controllers and subsequently to demonstrate their applicability during control of a laboratory model with uncertain parameters through the Programmable Logic controller (PLC) SIMATIC S7-300 by Siemens Company. The proposed and utilized synthesis consists of two steps - the former one is a determination of controller parameters area, which ensures the robustly stable control loop and which is based on the computing/plotting the stability boundary locus while the latter one lies in the final choice of the controller itself relying on algebraic techniques. The basic theoretical parts are followed by laboratory experiments in which the 3rd order nonlinear electronic model has been successfully controlled in various working points. © 2009 IFAC.

关键词： Programmable logic controllers

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