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International Conference on Computer and automation Engineering, ICCAE

作者： Jan Rybář Samuel Emebu Sayed Yousuf Sayed Sohaibullah Zarghoon Lukáš Bartalský Peter Onderčo Andrej Smetánka Radek Matušů Faculty of Mechanical Engineering Institute of Automation Informatization and Measurement Slovak University of Technology Bratislava Slovakia Department of Separation Science LUT School of Engineering Science Lappeenranta-Lahti University of Technology Lappeenranta Finland Department of Auto mechanical Engineering Faculty of Electro-Mechanic Kabul Polytechnic University Kabul Afghanistan Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlín Zlín Czech Republic

ISBN: (数字)9798331533816

ISBN: (纸本)9798331533823

Induction heating is widely used in industrial furnaces because of its rapid response time and high energy efficiency. To design and optimize these furnaces, computer-aided simulations are essential. This study aims to develop an accurate temperature field model for a square cross-section steel billet in an induction furnace by leveraging various parameters in COMSOL Multiphysics software. The simulation analysis incorporated temperature dynamics, considering skin depth, temperaturedependent, and constant parameters of the steel billet. The datadriven model was converted into a state-space representation utilizing MATLAB's System Identification Toolbox. This conversion facilitated the design of a Linear Quadratic Regulator (LQR) with integral gain and pole placement. Further, these controllers' performance was analyzed, and controllers were successfully implemented to regulate the temperature field of the billet from initial temperature to reference temperature, utilizing the distributed parameter system control circuit.

关键词： Billets Analytical models Temperature Accuracy Computational modeling Furnaces Mathematical models Temperature control Steel Induction heating

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Real-time MHE-based nonlinear MPC of a Pendubot system

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IFAC-PapersOnLine 2015年第23期48卷 422-427页

作者： Gulan, M. Salaj, M. Abdollahpouri, M. Rohal-Ilkiv, B. Institute of Automation Measurement and Applied Informatics Faculty of Mechanical Engineering Slovak University of Technology Bratislava Slovakia

This paper addresses the real-time optimal control of a Pendubot using nonlinear model predictive control (NMPC) combined with nonlinear moving horizon estimation (MHE). This fast, under-actuated nonlinear mechatronic system apparently poses a challenging benchmark problem that may benefit from a nonlinear optimization scheme. To overcome the related computational difficulties we make use of the ACADO Code Generation tool allowing to export a highly efficient Gauss-Newton real-time iteration algorithm tailored to the nonlinear optimal control and estimation problem while respecting the imposed *** show experimental results illustrating the overall closed-loop control performance, as well as the advantages of the nonlinear MHE-based NMPC scheme. © 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Nonlinear analysis Computational efficiency Iterative methods Model predictive control Nonlinear programming Optimal systems Predictive control systems Real time control Robots Closed loop control performance fast NMPC Moving horizon estimation Non linear optimal control Non linear optimization Nonlinear model predictive control Pendubots Under actuated systems

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Real-time State Estimation for an Adaptive Vibration Energy Harvesting System

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IFAC-PapersOnLine 2016年第25期49卷 127-132页

作者： Abdollahpouri, Mohammad Gulan, Martin Takács, Gergely Rohal'-Ilkiv, Boris Slovak University of Technology in Bratislava Faculty of Mechanical Engineering Institute of Automation Measurement and Applied Informatics Slovakia

Moving horizon estimation (MHE) has proven to be an efficient optimization-based technique to address the problem of joint state and parameter estimation with nonlinearities in system dynamics and constraints. This work aims to propose the application of MHE for a specific nonlinear vibration setup, often used to analyze energy harvesting concepts in the laboratory environment. Using a simulated energy harvesting scenario exhibiting a strongly nonlinear behavior, we focus on the estimation of unmeasured system states and a time-varying structural parameter that can be utilized to maximize the harvested energy, or in structural health monitoring. To exploit the recent algorithmic developments in embedded optimization, we implement the proposed scheme on a low-cost embedded computing platform using automatic code generation. A hardware-in-the-loop setup is used in order to investigate the performance of the real-time MHE scheme, and to quantify the associated computational effort. The results demonstrated in this paper, suggest the real-time feasibility of MHE, and certain practical advantages over a standard Kalman filtering in a vibration energy harvesting system. © 2016

关键词： Parameter estimation Automatic programming Cantilever beams Embedded systems Energy harvesting Structural health monitoring Vibration analysis Automatic code generations Duffing oscillator Embedded optimizations Moving horizon estimation Optimization based techniques State and parameter estimations Time varying structural parameters Vibration energy harvesting

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Application Aspects of Active-set Quadratic Programming in Real-time Embedded Model Predictive Vibration Control

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IFAC-PapersOnLine 2017年第1期50卷 11625-11631页

作者： Batista G. Takács G. Rohal’-Ilkiv B. Institute of Automation Measurement and Applied Informatics Faculty of Mechanical Engineering Slovak University of Technology in Bratislava Slovakia

This paper presents a study on the practical utilization of various microcontroller units (MCU) for model predictive vibration control, using an online active-set quadratic programming solver. The implementation properties of various 32bit MCUs are assessed in experiment. An analysis of memory requirements is made on all investigated MCUs, along with evaluating timing requirements for a simple vibration control problem. These tests show execution time limits, memory footprint, and convergence under different circumstances. The experiments investigate the effects of hot-starting, numerical precision and the use of the floating-point unit (FPU) of the MCU. The results presented in this paper show that the hot-starting technique used with double precision data format is preferable, since computation using single precision numeric format fails to converge on many instances. Although it is tempting to reduce numerical precision to extend the maximal horizon stored in the volatile and nonvolatile memories and to cut execution times, the numerical stability of the investigated online active-set quadratic programming solver is heavily affected. Moreover, it has been found that a built-in FPU does not have significant impact on performance; the presence of this hardware feature does not significantly aid the implementation of model predictive control for the case study presented here. © 2017

关键词： embedded systems microcontroller unit model predictive control online active-set strategy quadratic programming vibration control

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LQR and Pole Placement Controllers with Integral Action Design Technique and Performance Analysis for Control of Temperature Field in Continuous Casting Process 24

LQR and Pole Placement Controllers with Integral Action Desi...

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24th International Carpathian Control Conference, ICCC 2023

作者： Zarghoon, Sohaibullah Belavy, Cyril Solvak University of Technology Institute of Automation Measurement and Applied Informatics Faculty of Mechanical Engineering Bratislava Slovakia

ISBN: (纸本)9798350310221

This paper presents the design of Linear Quadratic Regulator and Pole Placement controllers with integral action using MATLAB and Simulink for controlling the temperature field in the secondary cooling zone of a continuous casting process. The secondary cooling zone in continuous casting represents a distributed parameter system. During steel production, the type of steel produced changes continuously, necessitating a control system that can respond quickly and flexibly. We compared the performance of the Linear Quadratic Regulator and Pole Placement control techniques for the temperature field in the secondary cooling zone by analyzing the system's response. The simulation results demonstrate that the Linear Quadratic Regulator technique outperforms the Pole Placement technique for the specified system. © 2023 IEEE.

关键词： Continuous casting

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Simulation and Control of a Continuously Cast Steel Billet in an Induction Furnace∗ 9

Simulation and Control of a Continuously Cast Steel Billet i...

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9th International Conference on Control, Decision and Information Technologies, CoDIT 2023

作者： Zarghoon, Sohaibullah Bartalsky, Lukas Belavy, Cyril Institute of Automation Measurement and Applied Informatics Slovak University of Technology Faculty of Mechanical Engineering Bratislava Slovakia

ISBN: (纸本)9798350311402

This paper presents a solution to a problem that Khan Steel Company in Afghanistan encountered in their induction furnace. The motivation for deploying induction heating technology in the industry is outlined, including a description of the current situation. Basic approaches for managing this technology, critical to the industry's success, are also provided. The process of creating an induction heating model using the COMSOL Multiphysics environment is described, with emphasis placed on the importance of starting the machine and determining the system's dynamics once it is in production mode. Finally, an identification and control proposal based on the distributed parameter system is presented, followed by a demonstration of the proposed control system using simulation results. © 2023 IEEE.

关键词： Induction heating

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Tracking of non-stationary biological signals with utilizing of adaptive filtering method 20

Tracking of non-stationary biological signals with utilizing...

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20th International Conference on Process Control, PC 2015

作者： Honek, Marek Malinovský, Ľudovít Ondrejkovič, Karol Rohaľ-Ilkiv, Boris Institute of Automation Measurement and Applied Informatics Faculty of Mechanical Engineering Slovak University of Technology Bratislava Slovakia

ISBN: (纸本)9781467366274

This paper presents an approach intended for tracking of biological non-stationary signals. The proposed approach utilizes a Kalman filter autoregressive model together with a method for estimation of covariance matrices of the uncorrelated process noise and measurement noise. The method was tested in simulations, where the ability of tracking of a class of time varying autoregressive processes was the subject of our interest. The obtained results are promising in the meaning that the suggested algorithm is suitable to track the time varying autoregressive processes with sufficient accuracy. © 2015 IEEE.

关键词： Adaptive filtering

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Monte Carlo Simulation in a Digital Calibration Certificate 15th

Monte Carlo Simulation in a Digital Calibration Certificate

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15th EAI International Conference on automation and Control in Theory and Practice, ARTEP 2023

作者： Sammarah, George Halaj, Martin Bartalský, Lukáš Palenčár, Jakub Slovak University of Technology in Bratislava Faculty of Mechanical Engineering Institute of Automation Measurement and Applied Informatics Bratislava Slovakia

ISBN: (纸本)9783031319662

To establish trust in the measurement results, the metrological traceability of the measuring devices utilized must be ensured. This can be accomplished by confirming or calibrating the instruments. In reality, the information received during calibration is given in the traditional calibration certificate, and the user of the certified instrument decides how to utilize it in the measurement. Here comes the role of the digital calibration certificate that unlocks several features of this kind of calibration certificate that the user can use during its own measurements. In our case, the digital calibration certificate provides the option of supplying a large amount of additional data that may be usefully employed in various different tests. There are several methods for solving this kind of a problem. The paper discusses one method to this problem which is called the "Monte Carlo Method" and shows it using a specific case to give you a closer sight of this problem. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Calibration

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Control of Temperature Field in the Secondary Cooling Zone of Continuous Casting Process Based on Robust Internal Model Control (IMC) Approach 15th

Control of Temperature Field in the Secondary Cooling Zone o...

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15th EAI International Conference on automation and Control in Theory and Practice, ARTEP 2023

作者： Zarghoon, Sohaibullah Bartalský, Lukáš Belavý, Cyril Institute of Automation Measurement and Applied Informatics Faculty of Mechanical Engineering Slovak University of Technology in Bratislava Bratislava Slovakia

ISBN: (纸本)9783031319662

As the cast strand moves through the secondary cooling zone in a continuous casting machine, the secondary cooling zone is typically separated into a number of zones to control the cooling rate. The secondary cooling zone’s primary tasks in terms of heat transfer are to deliver the amount of water necessary to completely solidify a strand within the parameters of continuous casting operation, such as steel grade and casting speed, or the system can the ability to control the strand’s thermal conditions from below the mold to the end of the secondary cooling zone, such as the required strand surface temperature. In this paper, the controller parameter optimization process will be done in Simulink using a robust control toolbox, and a robust method based on IMC controllers will be selected for control synthesis with the consideration of the controlled system uncertainty, and the result will be displayed as temperature fields, which represent the system with distributed parameters. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Continuous casting

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Steel billet continuous induction heating - Numerical model and advanced control

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2013 International Conference on applied Mechanics, Materials, and Manufacturing, AMMM 2013

作者： Kapusta, Juraj Camber, Juraj Hulkó, Gabriel Institute of Automation Measurement and Applied Informatics Slovak University of Technology Nám. Slobody 17 812 31 Bratislava Slovakia

ISBN: (纸本)9783037857953

Nowadays, the achievement of proper steel billets temperature profile is not the only design priority of induction heaters for hot forming applications. Due to its high operating costs, its design is constantly improving in terms of electrical and thermal efficiency. Therefore the more efficient multi-coil design starts to be more used in industrial practice. Numerical model of mentioned heater based on partial differential equations were solved by finite element method in virtual software environment. Primary goal of computer modeling was to investigate the thermal dynamics of four-module heater working in steady-state operation regime. Obtained data were applied to design an advanced control circuit based on distributed parameter systems theory. This may open up the opportunity to make further progress in induction heaters design. © (2013) Trans Tech Publications, Switzerland.

关键词： Design

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