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International Conference on Process Control (PC)

作者： Boris Barbolyas Cyril Belavý Ján Vachálek Ladislav Dedík Diana Bzdúšková Faculty of Mechanical Engineering Slovak University of Technology in Bratislava Institute of Automation Measurement and Applied Informatics Faculty of Mechanical Engineering Slovak University of Technology in Bratislava Institute of Normal and Pathological Physiology Slovak Academy of Sciences Bratislava Slovakia

The Center of Pressure (COP) signal is a kind of human postural response and it is an established indicator of human ability to maintain balanced posture. Its form of the statokinesigram has complicated profile, which suggests stochastic or chaotic nature of COP movement. Here is presented developed statokinesigram trajectory (DST) as a basis of method for human postural response analysis. Since DST does not show signs of stochastic behavior it is suitable for modeling with help of linear system theory. In this study, volunteer's postural responses were affected by bilateral vibration stimuli of Achilles tendons. This vibration stimulus causes nonlinear response in anterior-posterior direction. DST allows to analyze this phenomenon through mathematical model in form of a transfer function. Its estimated parameters are useful in evaluation of human posture control.

关键词： Vibrations Trajectory Robot sensing systems Tendons Transfer functions Pathology Estimation

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GrainAutLine: An environment for semi-automatic processing of marble thin section images

Periodica polytechnica Electrical engineering and computer s...

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Periodica polytechnica Electrical engineering and computer science 2017年第4期61卷 305-311页

作者： Csorba, Kristóf Budai, Ádám Zöldföldi, Judit Székely, Balázs Department of Automation and Applied Informatics Faculty of Electrical Engineering and Informatics Budapest University of Technology and Economics P.O.B. 91 BudapestH-1117 Hungary Institute of Material Science University of Stuttgart Stuttgart Germany Department of Geophysics and Space Sciences Eötvös Loránd University Budapest Hungary

GrainAutLine is an interdisciplinary microscopy image analysis tool with domain specific smart functions to partially automate the processing of marble thin section images. It allows the user to create a clean grain boundary image which is a starting point of several archaeometric and geologic analyses. The semi-automatic tools minimize the need for carefully drawing the grain boundaries manually, even in cases where twin crystals prohibit the use of classic edge detection based boundary detection. Due to the semi-automatic approach, the user has full control over the process and can modify the automatic results before finalizing a specific step. This approach guarantees high quality results both in cases where the process is easy to automate, and also if it needs more help from the user. This paper presents the basic operation of the system and details about the provided tools as a case study for an interdisciplinary, semi-automatic image processing application.

关键词： Grain boundaries

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Calculus for directional limiting normal cones and subdifferentials

arXiv

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arXiv 2017年

作者： Benko, Matúš Gfrerer, Helmut Outrata, Jiří V. Institute of Computational Mathematics Johannes Kepler University Linz LinzA-4040 Austria Czech Academy of Sciences Institute of Information Theory and Automation Prague18208 Centre for Informatics and Applied Optimization Federation University of Australia BallaratVIC3350 Australia

The paper is devoted to the development of a comprehensive calculus for directional limiting normal cones, subdifferentials and coderivatives in finite dimensions. This calculus encompasses the whole range of the standard generalized differential calculus for (non-directional) limiting notions and relies on very weak (non-restrictive) qualification conditions having also a directional character. The derived rules facilitate the application of tools exploiting the directional limiting notions to difficult problems of variational analysis including, for instance, various stability and sensitivity issues. This is illustrated by some selected applications in the last part of the paper.49J53, 49J52, 90C31 Copyright © 2017, The Authors. All rights reserved.

关键词： Differentiation (calculus)

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Rotor-angle versus voltage instability in the third-order model for synchronous generators

arXiv

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arXiv 2017年

作者： Sharafutdinov, Konstantin Gorjão, Leonardo Rydin Matthiae, Moritz Faulwasser, Timm Witthaut, Dirk Jülich52428 Germany Institute for Theoretical Physics University of Cologne Köln50937 Germany Department of Micro- and Nanotechnology Technical University of Denmark Kongens Lyngby2800 Denmark Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Karlsruhe76344 Germany

We investigate the interplay of rotor-angle and voltage stability in electric power systems. To this end, we carry out a local stability analysis of the third-order model which entails the classical power-swing equations and the voltage dynamics. We provide necessary and sufficient stability conditions and investigate different routes to instability. For the special case of a two-bus system we analytically derive a global stability map. Copyright © 2017, The Authors. All rights reserved.

关键词： Synchronous generators

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Bird's Eye View on Systems and Control - General View and Case Studies

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IFAC-PapersOnLine 2016年第6期49卷 274-279页

作者： Vámos, T. Bars, R. Sik, D. Institute of Computer Science and Control Hungarian Academy of Sciences MTA-SZTAKI Budapest Hungary Dept. of Automation and Applied Informatics Budapest University of Technology and Economics MTA-BME Control Engineering Research Group Budapest Hungary

Systems and control are all around us. System view, understanding systems and how they are controlled is important for everyone. The behavior of systems is determined by some fundamental principles which can be understood by everyone. The main principles governing systems and control are presented on different levels. The first level is dedicated for everyone. Comics-like interpretation is provided with explanations. The second level discusses the main topics dedicated for the interested students. Several case studies demonstrate how system view is considered in different areas of life. With this approach systems in different areas of life could be better understood contributing to better decisions influencing their performance. The third level provides deeper insight into some aspects of modern mathematical system theory, to geometric view of control systems. The material is available on a website on the internet. © 2016

关键词： Control theory Algorithms Case studies Control disciplines Control education Control structure Systems and control

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Experimental Research of Dry Friction in "Alumina Ceramics – Quartz Glass" Pair

Manufacturing Technology

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Manufacturing Technology 2017年第2期17卷 3-4页

作者： Abramov, Ivan Božek, Pavol Lekomtsev, Pavel Nikitin, Yury Shchenyatsky, Aleksey Departament of Mechatronic Systems Kalashnikov Izhevsk State Technical University ul. Studencheskaya 7 Izhevsk426069 Russia Institute of Applied Informatics Automation and Mathematics Faculty of Materials Science and Technology Slovak University of Technology Hajdóczyho 1 Trnava917 24 Slovakia

Results of an experimental research of friction coefficient in "alumina ceramics – quartz glass" friction pair are presented. The research with pin on disc test configuration using SRV–III test machine was carried out at loads from 10 to 1000 N, constant sliding velocities 5 mm/s;ambient temperature 23°C and relative humidity 30%. The obtained results reveal that in general, friction coefficient for "alumina ceramics – quartz glass" pair decreases with the increase in normal load. It is shown that the obtained friction coefficients values at the normal force from 100 to 1000 N for the given experimental conditions can be used to pre-estimate the interference fits in "alumina ceramics – quartz glass" friction pairs. Copyright © 2017. Published by Manufacturing Technology. All rights reserved.

关键词： Friction

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Software sensor as distributed parameter system for the control of secondary cooling in the continuous casting of steel

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IFAC-PapersOnLine 2016年第20期49卷 49-54页

作者： Hulkó, G. Ondrejkovi, K. Buek, P. Bartko, M. Institute of Automation Measurement and Applied Informatics FME STU in Bratislava Nám. slobody 17 Bratislava812 31 Slovakia P VVC s.r.o. Kolkáre 35 Podbrezová976 81 Slovakia

Sophisticated numerical models are created nowadays for the continuous casting of steel, partly thanks to the rapid development of information technology. These models are based on the numerical solutions of nonlinear partial differential equations describing the dynamics of modelled phenomena. Such distributed parameter numerical models used as “software sensors” offer the possibility to control the secondary cooling process. However, in current engineering practice the control synthesis is solved by lumped parameter systems approach. This paper shows how to solve the control synthesis problem based on distributed parameter system approach, using widely available software products for numerical modelling of continuous casting of steel combined with algorithms for control of lumped and distributed parameter systems. © 2016

关键词： Distributed parameter control systems Continuous casting Control system synthesis Intelligent control Model predictive control Nonlinear equations Numerical models Partial differential equations Steel castings Approximation problems Constrained model predictive control Continuous casting of steels Control design Distributed parameter systems Software sensor

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The statistical methods for the management of the measurement process 15

The statistical methods for the management of the measuremen...

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15th Conference on applied Mathematics 2016, APLIMAT 2016

作者： Jenčuráková, Dana Palenčár, Rudolf Slovak University of Technology in Bratislava Faculty of Mechanical Engineering Institute of automation Measurement and Applied Informatics Námestie slobody 17 Bratislava812 31 Slovakia

ISBN: (纸本)9788022745314

Contribution constitutes the statistical process control of the measurement process in the laboratory conditions. Using appropriate statistical methods points to the real state of the measurement process. Presentation of used control charts and other methods highlights the merits of their applications. To supplement the methods with the cumulative sum chart and the Kalman filtering is the consideration on the experience in the regulation of the statistical measurement processes control.

关键词： Control charts

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On the Aubin property of a class of parameterized variational systems

arXiv

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arXiv 2017年

作者： Gfrerer, H. Outrata, J.V. Institute of Computational Mathematics Johannes Kepler University Linz LinzA-4040 Austria Institute of Information Theory and Automation Academy of Sciences of the Czech Republic Prague18208 Czech Republic Centre for Informatics and Applied Optimization Federation University of Australia POB 663 BallaratVIC3350 Australia

The paper deals with a new sharp criterion ensuring the Aubin property of solution maps to a class of parameterized variational systems. This class includes parameter-dependent variational inequalities with non-polyhedral constraint sets and also parameterized generalized equations with conic constraints. The new criterion requires computation of directional limiting coderivatives of the normal-cone mapping for the so-called critical directions. The respective formulas have the form of a second-order chain rule and extend the available calculus of directional limiting objects. The suggested procedure is illustrated by means of examples.49J53, 90C31, 90C46 Copyright © 2017, The Authors. All rights reserved.

关键词： Parameterization

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The digital twin of an industrial production line within the industry 4.0 concept

The digital twin of an industrial production line within the...

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International Conference on Process Control (PC)

作者： Ján Vachálek Lukás Bartalský Oliver Rovný Dana Šišmišová Martin Morháč Milan Lokšík Measurement and Applied Informatics Slovak University of Technology in Bratislava Bratislava Slovak Republic Institute of Automation Measurement and Applied Informatics Faculty of Mechanical Engineering Slovak University of Technology in Bratislava Nám. slobody 17 812 31 Bratislava Slovak Republic SOVA Digital Bratislava Slovak Republic SOVA Digital a.s. Bojnická 3 831 04 Bratislava Slovak Republic

This article presents the digital twin concept, which is an augmented manufacturing project created in close collaboration by SOVA Digital and the institute of automation, Measurement and applied informatics (ÚAMAI), of the Faculty of Mechanical Engineering, Slovak University of Technology in Bratislava with the support of SIEMENS. The project is a technological concept focusing on the continuous optimization of production processes, proactive maintenance, and continuous processing of process data. This project is the basis for further work to promote the concept of Industry 4.0. for the needs of the industry subjects within Slovakia. Its basic goal is to support the existing production structures within the automotive industry and the most efficient use of resources by augmented production and planning strategies, such as the digital twin presented here.

关键词： Production Industries Optimization Manipulators Genetic algorithms Linear programming Manufacturing

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