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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Andreea Elena Țîru Iulian Vasiliev Larisa Diaconu Ramon Vilanova Daniel Voipan Harsha Ratnaweera Department of Automatic Control and Electrical Engineering "Dunărea de Jos" University of Galaţi Galaţi Romania Department of Automation Systems and Advanced Control Research Autonomous University of Barcelona Barcelona Spain Department of Computer Science and Information Technology "Dunărea de Jos" University of Galaţi Galaţi Romania Faculty of Science and Technology (Realtek) Norwegian University of Life Sciences Ås Norway

The management of wastewater is a significant global concern that calls for innovative solutions to lessen its negative effects on the environment. Conventional techniques of treating wastewater need improvement in order to deal with newly discovered contaminants, which highlights the importance of providing precise estimates of process performance and resource requirements. The worsening water shortage situation requires a paradigm shift in which wastewater is viewed as a useful resource. It is possible to create an economy that is both sustainable and circular by treating and recycling wastewater, putting less pressure on freshwater supplies, and leaving as little of an environmental footprint as possible. This study investigates the use of Artificial Neural Networks (ANNs) as software estimators in the treatment of wastewater, with a particular emphasis on predicting ammonium concentrations in effluent. In order to deal with imbalanced time-series data, the research introduces innovative data pretreatment strategies. These techniques include a Sliding Window protocol, Data Normalization, and a K-Fold training scheme. This illustrates the potential of ANNs to revolutionize wastewater treatment procedures and drive developments in this field. The suggested method demonstrates higher performance when estimating pollutant concentrations, showing the ability of ANNs to do so.

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The Dynamic of the Grid with the Presence of WF and the AVR for Power Quality Enhancement

The Dynamic of the Grid with the Presence of WF and the AVR ...

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Computing and Information Technology (ICCIT-1441), 2020 International Conference on

作者： Hafaiedh Hajer Saoudi Yahia Benamor Anouar Chrifi-Alaoui Larbi Okba Taouali University of Tunis Higher National School of Engineering of Tunis (ENSIT) Tunis Tunisia Laboratory of Automatic Signal and Image Processing (LARATSI) National School of Engineers of Monastir University of Monastir Monastir Tunisia Laboratory of Control and Energy Management Laboratory (CEMLab) National engineering school of Sfax University of Sfax Sfax Tunisia Verne IUT of Amiens Avenue of Faculties Laboratory of Innovative Technologies of the University of Picardy Jules Amiens France Faculty of Computers and Information Technology University of Tabuk Tabuk Saudi Arabia

ISBN: (数字)9798350353839

ISBN: (纸本)9798350353846

There are several issues with energy quality when wind energy is integrated into electrical networks. This study further classifies these problems, focusing particularly on harmonics and short-term voltage fluctuations resulting from the integration of two types of wind turbines: the first type is the Squirrel Cage Induction Generator (SCIG), and the second type is the Double-Fed Induction Generator (DFIG). Additionally, it explores methods and tools to mitigate these challenges. The article focuses on future opportunities and current trends in improving the integration of Wind Energy Conversion systems (WECS) into power grids. Through steady-state time series simulations, the study presents case studies examining voltage fluctuations, an important concern for power quality. Using the IEEE 14-bus test, designed to accommodate various operating conditions and wind power penetrations, the study assesses the impact on power quality. These systems feature synchronous generators connected by automated voltage regulators (AVR) to buses 2 and 4.

关键词： Voltage fluctuations Regulators Fluctuations Power quality Time series analysis Synchronous generators Wind turbines Steady-state Voltage control Wind energy conversion

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Mobile Application for Visualizing the Measurements

Mobile Application for Visualizing the Measurements

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International Conference on Modern Electrical and Energy systems (MEES)

作者： Simona Kirešová Milan Guzan Branislav Sobota Viacheslav Melnykov Rostyslav Yatsiuk Bohdan Peryvertailo Dept. of Theoretical and Industrial Electrical Engineering Technical University of Košice Košice Slovakia Dept. of Computers and Informatics Technical University of Košice Košice Slovakia Dept. of Systems of Automatic Control and Electric Drive Kremenchuk Mykhailo Ostrohradskyi National University Kremenchuk Ukraine Dept. of Computer Engineering and Electronics Kremenchuk Mykhailo Ostrohradskyi National University Kremenchuk Ukraine

This paper deals with the design of an Android mobile application and visualization of the measured values of particulate matter and meteorological factors from the measurement stations. The application can in principle be effectively used in any field of data visualization. The architecture of the mobile application, the security, the use of AWS services to access the data in the InfluxDB databases, as well as the user interface and graphical visualizations of the measured data are described and illustrated. The application is user tested and the paper documents their first experiences using the mobile application.

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Distributed control of Descriptor Networks: A Convex Procedure for Augmented Sparsity

arXiv

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arXiv 2021年

作者： Sperilă, Andrei Oară, Cristian Ciubotaru, Bogdan D. Sabău, Şerban Faculty of Automatic Control and Computers "Politehnica" University of Bucharest Sector 6 060042 Romania Electrical and Computer Engineering Department Stevens Institute of Technology HobokenNJ07030 United States

For networks of systems, with possibly improper transfer function matrices, we present a design framework which enables H∞ control, while imposing sparsity constraints on the controller’s coprime factors. We propose a convex and iterative optimization procedure with guaranteed convergence to obtain distributed controllers. By exploiting the robustness-oriented nature of our proposed approach, we provide the means to obtain sparse representations of our control laws that may not be directly supported by the network’s nominal model. © 2021, CC BY.

关键词： Convex optimization

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Peak Estimation of Time Delay systems Using Occupation Measures

Peak Estimation of Time Delay Systems Using Occupation Measu...

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IEEE Conference on Decision and control

作者： Jared Miller Milan Korda Victor Magron Mario Sznaier Automatic Control Laboratory (IfA) ETH Zürich Zürich Switzerland ECE Department Robust Systems Lab Northeastern University Boston MA Polynomial OPtimization Team LAAS-CNRS Toulouse France Faculty of Electrical Engineering Czech Technical University in Prague Prague Czech Republic Institut de Mathématiques de Toulouse France

This work proposes a method to compute the maximum value obtained by a state function along trajectories of a Delay Differential Equation (DDE). An example of this task is finding the maximum number of infected people in an epidemic model with a nonzero incubation period. The variables of this peak estimation problem include the stopping time and the original history (restricted to a class of admissible histories). The original nonconvex DDE peak estimation problem is approximated by an infinite-dimensional Linear Program (LP) in occupation measures, inspired by existing measure-based methods in peak estimation and optimal control. This LP is approximated from above by a sequence of Semidefinite Programs (SDPs) through the moment-Sum of Squares (SOS) hierarchy. Effectiveness of this scheme in providing peak estimates for DDEs is demonstrated with provided examples.

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integrated model of positioning and situation monitoring system using LORA, WiFi, GSM technology 3

integrated model of positioning and situation monitoring sys...

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3rd IEEE International Conference on Advanced Trends in Information Theory, ATIT 2021

作者： Tymochko, Oleksandr Afanasiev, Yurii Fustii, Vadym Afanasiev, Volodymyr Fediuk, Serhii Telyatnik, Boris Flight Faculty ivan Kozhedub Kharkiv National Air Forces University Kharkiv Ukraine V.V. Popovskyy Department of infocommunication Engineering Kharkiv National University of Radio Electronics Kharkiv Ukraine Department of Combat Application and Operation of Automatic Control Systems ivan Kozhedub Kharkiv National Air Forces University Kharkiv Ukraine

ISBN: (纸本)9781665438452

The article analyzes the functioning of monitoring and positioning systems at complex technical objects. it is shown that when objects are located in remote areas, the absence of cellular communication is possible. To solve the problems of monitoring such territories, the complex application of such communication technologies as LoRa, Wi-Fi is considered. Based on the requirements for the monitoring system, a multilevel integrated model is proposed that allows using a unified approach to both hardware and software components of the system. Based on the proposed model, an experimental study of the positioning and monitoring system was carried out. The properties of the system operability have been confirmed under conditions of limited functioning of individual elements. © 2021 iEEE.

关键词： Monitoring

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Gramian Preserving Moment Matching for Linear systems*

Gramian Preserving Moment Matching for Linear Systems*

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European control Conference (ECC)

作者： Yu Kawano Tudor C. Ionescu Orest V. Iftime Graduate School of Advanced Science and Engineering Hiroshima University Higashi-hiroshima Japan Department of Automatic Control and Systems Engineering University Politehnica Bucharest Bucharest Romania “Gheorghe Mihoc-Caius Iacob” Institute of Mathematical Statistics and Applied Mathematics of the Romanian Academy Bucharest Romania Department of Economics Econometrics and Finance Faculty of Economics and Business University of Groningen Nettelbosje 2 Groningen The Netherlands

Time-domain moment matching-based model order reduction is an efficient technique that provides a family of parametrized reduced order models with identical moments evaluated in a set of points. The free parameters provide flexibility to impose additional constraints such as stability, passivity, and derivative matching. In this paper, for a single-input and single-output linear time-invariant system, we consider the problem of constructing a reduced-order model by balanced truncation via moment matching. We show that there exists an exo-system yielding a reduced order model with a desired controllability Gramian. Similarly, an exo-system of dual moment matching provides a reduced order model with a desired observability Gramian. Therefore, combining the two moment matching methods can yield a reduced order model by balanced truncation, opening a door to achieve model reduction by balanced truncation via moment matching

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An exponential stability test for a messenger rna–micro rna ode model

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UPB Scientific Bulletin, Series A: Applied Mathematics and Physics 2020年第4期82卷 11-16页

作者： Olteanu, Mircea Ştefan, Radu Department of Mathematical Methods and Models Faculty of Applied Sciences University "Politehnica" of Bucharest Romania Department of Automatic Control and Systems Engineering Faculty of Automatic Control and Computer Science University "Politehnica" of Bucharest Romania

In this paper we obtain a numerically tractable test (sufficient condition) for the exponential stability of the unique positive equilibrium point of an ODE system. The result (Theorem 3.1) is based on Lyapunov theory and Linear Ma-trix Inequalities techniques. The ODE model is related to the messengerRNA-microRNA interaction. © 2020, Politechnica University of Bucharest. All rights reserved.

关键词： RNA

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control design with guaranteed transient performance: An approach with polyhedral target tubes

arXiv

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arXiv 2021年

作者： Esterhuizen, Willem Wang, Qing-Guo Technische Universität Chemnitz Automatic Control & System Dynamics Laboratory Germany Institute for Intelligent Systems Faculty of Engineering and the Built Environment University of Johannesburg South Africa

In this paper a novel approach is presented for control design with guaranteed transient performance for multiple-input multiple-output discrete-time linear polytopic difference inclusions. We establish a theorem that gives necessary and sufficient conditions for the state to evolve from one polyhedral subset of the state-space to another. Then we present an algorithm which constructs a time-varying output feedback law which guarantees that the state evolves within a time-varying polyhedral target-tube specifying the system’s desired transient performance. We present generalisations involving constraints on the control, and a bounded additive disturbance term. Our formulation is very general and includes reference tracking with any desired transient behaviour in the face of disturbances, as specified, for example, by the most popular step response specifications. The approach is demonstrated by an example involving the control of water levels in two coupled *** Codes 93C35, 93C05, 93B52 © 2021, CC BY-NC-ND.

关键词： Transient analysis

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Universal Software Platform in the IoT Concept for the Task of Monitoring Mobile Objects 8

Universal Software Platform in the IoT Concept for the Task ...

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8th IEEE International Conference on Problems of Infocommunications, Science and Technology, PIC S and T 2021

作者： Afanasiev, Volodymyr Afanasiev, Yrii Fustii, Vadym Aroslankin, Oleksandr Surhai, Vitalii Sitkov, Oleksii Ivan Kozhedub Kharkiv National Air Forces University Flight Faculty Kharkiv Ukraine Kharkiv National University of Radio Electronics V.V. Popovskyy Department of Info Communication Engineering Kharkiv Ukraine Ivan Kozhedub Kharkiv National Air Forces University Department of Combat Application And Operation of Automatic Control Systems Kharkiv Ukraine

ISBN: (纸本)9781665406826

The article presents the results of research on the implementation of a monitoring system with a spatio-temporal reference, based on the complex application of various technologies for wireless data transmission. A universal software platform in the concept of the Internet of Things is presented, based on which it is possible to implement various applications in the tasks of machine-to-machine communication. The hardware is based on ESP microcontrollers. © 2021 IEEE.

关键词： Monitoring

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