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International Symposium on Fundamentals of Electrical Engineering (ISFEE)

作者： Razvan Mocanu Alexandru Onea Department of Automatic Control and Applied Informatics Technical University Gheorghe Asachi of Iasi Iasi Romania

ISBN: (纸本)9781538672136

In this study is proposed a Simple Adaptive control (SAC) design for a Permanent Magnet Synchronous Machine (PMSM). The control system is constructed in rotor reference frame and forms a cascade structure. In the inner loop are controlled the direct and the quadrature currents and in the outer loop is controlled the angular speed of the shaft. The non-linear behaviour is compensated through feedforward controllers while an Extened Kalman Filter (EKF) is used to compensate unknown disturbances caused, for example, by deviations of parameters or by unconsidered dynamics. Thus, these compensations lead to a linear behaviour of the process over which the SAC strategy is overlapped. The performance of the adaptive control system is verified by numerical simulations.

关键词： Kalman filters Mathematical model Rotors Adaptive control Torque Adaptation models Stators

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A comparative study of EMI generated by PWM techniques in HEV and EV

A comparative study of EMI generated by PWM techniques in HE...

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Compatibility in Power Electronics (CPE)

作者： Ioan-Alex Alexa Alexandru-Tudor Popovici Alexandru Onea Department of Automatic Control and Applied Informatics Gh. Asachi Technical University Iasi Romania

The hybrid electrical vehicle (HEV) and the electrical vehicle (EV) use for propulsion a three-phase electrical machine, a voltage source inverter (VSI), and a battery with the nominal voltage up to 400V. The VSI is supplied by the high voltage battery which has connected in parallel a DC link capacitor. The switching of VSI semiconductors is the most important generator of harmonics in currents and voltages, and this represents the main source of electromagnetic interference (EMI). This paper presents the spectral analysis of phase currents and phase voltages for several types of PWM techniques. The analysis also evaluates the available transferred power, efficiency, and algorithm complexity. The results of the study are obtained using Matlab/Simulink simulation environment. It is chosen a static model of the electrical machine. Thus, the phase currents can be computed from imposed phase voltages and electrical machine characteristics. It is presented the influence in DC link harmonics of supplied voltage level and DC link capacitance corroborated with different PWM techniques.

关键词： Pulse width modulation Inverters Harmonic analysis Electromagnetic interference Switches Power harmonic filters

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Complex system dedicated to monitoring and control of hydroponic greenhouse environment 17

Complex system dedicated to monitoring and control of hydrop...

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17th International Multidisciplinary Scientific Geoconference, SGEM 2017

作者： Ştefan, Mocanu Alexandru, Dumitraşcu Cosmin, Popa Department of Automatic Control and Applied Informatics Bucharest Romania Department of Automatic Control and Systems Engineering Faculty of Automatic Control and Computers UPB Bucharest Romania

ISBN: (纸本)9786197408263

Fast increase of Earth population during the last decades raised a serious problem when it came to providing fresh and good quality food (mainly vegetables) in big quantity over a short period of time. Due to relatively long lifecycles of plants when growing in gardens or fields, the best solution consisted in using greenhouses. Greenhouses proved to be a very important solution since they are capable of operating regardless of local environments if minimum requirements (heating and water) are provided. By offering optimum growing conditions for the plants, the greenhouse environments not only stimulate a shorter lifecycle but also offer almost perfect protection against pests or plants diseases. An even better solution is represented by hydroponic greenhouses which exhibit several advantages over traditional greenhouses: they do not need earth for growing plants, the size and location are less restrictive, the plant cultures can be overlapped and the nutrients and other parameters can be controlled and personalized more efficiently. However, this comes with a higher cost for implementing and using automatic control architecture. In addition to specialized sensors, efficient solutions for data transmission, control and command must be used. In this paper a hydroponic system is presented. It aims to control not only a greenhouse but a set of greenhouses by aggregating them into a complex grid alike mechanism of monitoring and control. Intermediate results prove the solution is functional but the final architecture is not yet finalized. © SGEM2017.

关键词： Embedded systems

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Robotized application based on deep learning and Internet of Things

Robotized application based on deep learning and Internet of...

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International Conference on System Theory, control, and Computing (ICSTCC)

作者： Carlos Pascal Laura-Ofelia Raveica Doru Panescu Department of Automatic Control and Applied Informatics “Gheorghe Asachi” Technical University of Iaşi Iaşi Romania

This paper presents a way to integrate an industrial robot into Internet of Things and to use it with a deep learning application. Besides of manufacturer's restrictions, which usually exist in an industrial scenario, an easy method to extend and merge the sensorial and decisional systems for robots will be required as part of Industry 4.0. Related to this, the proposed method couples IBM Watson IoT cloud-based platform, a Node-RED cloud application, a deep learning mechanism with TensorFlow (this being applied for a computer vision case study), and an old generation industrial robot. Several conclusions highlight the tradeoff of using IoT and deep learning solutions for a real manufacturing environment.

关键词： Service robots Robot sensing systems Cloud computing Internet of Things Computer vision

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Positive Interval System Dynamics Explored via Vertex Representatives vs. Vertex Majorizations

Positive Interval System Dynamics Explored via Vertex Repres...

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International Conference on System Theory, control, and Computing (ICSTCC)

作者： Octavian Pastravanu Mihaela-Hanako Matcovschi Ovidiu Pauca Department of Automatic Control and Applied Informatics “Gheorghe Asachi” Technical University of Iasi Blvd. Mangeron 27 Romania

The paper explores the properties of positive interval dynamic systems in continuous-time, via two types of techniques, and develops a comparative study between the two approaches. The first type is based on the properties of the row and column representatives corresponding to the vertex set of the interval matrix A = [A - , A + ] ⊂ ℝ n×n . The second type employs the properties of the dominant vertex A + of the interval matrix. The results, separately derived for the two approaches, show the equivalence between the Hurwitz stability of matrix A + , the existence of several classes of Lyapunov functions, and the existence of several classes of exponentially decreasing sets that are positively invariant with respect to the interval system dynamics.

关键词： Linear matrix inequalities Lyapunov methods Trajectory Eigenvalues and eigenfunctions Switches Symmetric matrices System dynamics

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Enhancing the role of column representatives in testing the invariance properties of switching systems

Enhancing the role of column representatives in testing the ...

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International Conference on System Theory, control, and Computing (ICSTCC)

作者： Mihaela-Hanako Matcovschi Octavian Pastravanu Mihail Voicu Department of Automatic Control and Applied Informatics “Gheorghe Asachi” Technical University of Iasi Blvd. Mangeron 27 Romania

The role played by column representatives is expanded in the study of the properties exhibited by the trajectories of arbitrary switching linear systems. Previous contributions on the employment of column representatives focused on positive dynamics and linear co positive Lyapunov functions associated with exponentially contractive positive sets that are invariant with respect to such dynamics. Our approach refers to arbitrary dynamics and invariant sets with general form for time-dependence. We address both discrete and continuous-time cases. Our key finding is that the existence of such invariant sets is fully characterized (if and only if) by the Schur (Hurwitz respectively) stability of the column representatives corresponding to a matrix set adequately built from the original system matrices. Our mathematical developments are illustrated by a numerical example. These developments incorporate the previous contributions mentioned above as particular cases.

关键词： Switching systems Trajectory Linear matrix inequalities Switches Eigenvalues and eigenfunctions Linear systems Lyapunov methods

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Performance Analysis of a Cloud Computing System using Queuing Model with Correlated Task Reneging

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Journal of Physics: Conference Series 2021年第1期2091卷

作者： Rakesh Kumar Bhavneet Singh Soodan Godlove Suila Kuaban Piotr Czekalski Sapana Sharma School of Mathematics Shri Mata Vaishno Devi University Katra Jammu and Kashmir 182320 India Department of Mathematics and Statistics Namibia University of Science and Technology Private Bag 13388 Windhoek Namibia 13 Jackson Kaujeua Street Windhoek Namibia Institute of Theoretical and Applied Informatics Polish Academy of Sciences Baltycka 5 44-100 Gliwice Poland Department of Computer Graphics Vision and Digital Systems Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Department of Mathematics Cluster University of Jammu Jammu and Kashmir

Queuing theory has been extensively used in the modelling and performance analysis of cloud computing systems. The phenomenon of the task (or request) reneging, that is, the dropping of requests from the request queue often occur in cloud computing systems, and it is important to consider it when developing performance evaluations models for cloud computing infrastructures. Majority of studies in the performance evaluation of cloud computing data centres with the use of queuing theory do not consider the fact that the tasks could be removed from queue without being serviced. The removal of tasks from the queue could be due to the user impatience, execution deadline expiration, security reasons, or as an active queue management strategy. The reneging could be correlated in nature, that is, if a request is dropped (or reneged) at any time epoch, and then there is a probability that a request may or may not be dropped at the next time epoch. This kind of dropping (or reneging) of requests is referred to as correlated request reneging. In this paper we have modelled a cloud computing infrastructure with correlated request reneging using queuing theory. An M/M/1/N queuing model with correlated reneging has been used to study the performance analysis of the load balancing server of a cloud computing system. The steady-state as well as the transient performance analyses have been carried out. Important measures of performance like average queue size, average delay, probability of task blocking, and the probability of no waiting in the queue are studied. Finally, some comparisons are performed which describe the effect of correlated task reneging over simple exponential reneging.

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An Early Stage Researcher's Primer on Systems Medicine Terminology

Network and Systems Medicine

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Network and Systems Medicine 2021年第1期4卷 2-50页

作者： Zanin, Massimiliano Aitya, Nadim A.A. Basilio, José Baumbach, Jan Benis, Arriel Behera, Chandan K. Bucholc, Magda Castiglione, Filippo Chouvarda, Ioanna Comte, Blandine Dao, Tien-Tuan Ding, Xuemei Pujos-Guillot, Estelle Filipovic, Nenad Finn, David P. Glass, David H. Harel, Nissim Iesmantas, Tomas Ivanoska, Ilinka Joshi, Alok Boudjeltia, Karim Zouaoui Kaoui, Badr Kaur, Daman Maguire, Liam P. McClean, Paula L. McCombe, Niamh De Miranda, João Luís Moisescu, Mihnea Alexandru Pappalardo, Francesco Polster, Annikka Prasad, Girijesh Rozman, Damjana Sacala, Ioan Sanchez-Bornot, Jose M. Schmid, Johannes A. Sharp, Trevor Solé-Casals, Jordi Spiwok, Vojtěch Spyrou, George M. Stalidzans, Egils Stres, Blaa Sustersic, Tijana Symeonidis, Ioannis Tieri, Paolo Todd, Stephen Van Steen, Kristel Veneva, Milena Wang, Da-Hui Wang, Haiying Wang, Hui Watterson, Steven Wong-Lin, Kongfatt Yang, Su Zou, Xin Schmidt, Harald H.H.W. Centro de Tecnología Biomédica Universidad Politécnica de Madrid Madrid Spain Intelligent Systems Research Centre School of Computing Engineering and Intelligent Systems Ulster University Ulster United Kingdom Center for Physiology and Pharmacology Institute of Vascular Biology and Thrombosis Research Medical University of Vienna Vienna Austria TUM School of Life Sciences Weihenstephan Technical University of Munich Freising Germany Holon Israel CNR National Research Council IAC Institute for Applied Computing Rome Italy Lab of Computing Medical Informatics and Biomedical Imaging Technologies School of Medicine Aristotle University of Thessaloniki Thessaloniki Greece Université Clermont Auvergne INRAE UNH Plateforme d'Exploration du Métabolisme MetaboHUB Clermont Clermont-Ferrand France Université de Technologie de Compiègne Compiègne France Labex MS2T Control of Technological Systems-of-Systems CNRS and Université de Technologie de Compiègne Compiègne France Faculty of Engineering University of Kragujevac Kragujevac Serbia Kragujevac Serbia Steinbeis Advanced Risk Technologies Institute Doo Kragujevac Kragujevac Serbia Pharmacology and Therapeutics School of Medicine Galway Neuroscience Centre National University of Ireland Galway Ireland School of Computing Ulster University Ulster United Kingdom Holon Israel Department of Mathematics and Natural Sciences Kaunas University of Technology Kaunas Lithuania Faculty of Computer Science and Engineering Ss. Cyril and Methodius University Skopje Macedonia Medicine Faculty Université Libre de Bruxelles CHU de Charleroi Charleroi Belgium Northern Ireland Centre for Stratified Medicine Biomedical Sciences Research Institute Ulster University Ulster United Kingdom Escola Superior de Tecnologia e Gestão Instituto Politécnico de Portalegre Portalegre Portugal Instituto Superior Técnico Universidade de Lisboa Lisboa Portugal Faculty of Automatic Control and Computers University Politehnica of B

Background: Systems Medicine is a novel approach to medicine, that is, an interdisciplinary field that considers the human body as a system, composed of multiple parts and of complex relationships at multiple levels, and further integrated into an environment. Exploring Systems Medicine implies understanding and combining concepts coming from diametral different fields, including medicine, biology, statistics, modeling and simulation, and data science. Such heterogeneity leads to semantic issues, which may slow down implementation and fruitful interaction between these highly diverse fields. Methods: In this review, we collect and explain more than100 terms related to Systems Medicine. These include both modeling and data science terms and basic systems medicine terms, along with some synthetic definitions, examples of applications, and lists of relevant references. Results: This glossary aims at being a first aid kit for the Systems Medicine researcher facing an unfamiliar term, where he/she can get a first understanding of them, and, more importantly, examples and references for digging into the topic. © Massimiliano Zanin et al., 2021;Published by Mary Ann Liebert, Inc. 2021.

关键词： Semantics

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The scheme of vertical handover procedure with care-of-address function 1

The scheme of vertical handover procedure with care-of-addre...

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1st Workshop (Summer Session) at the Conference on Information and Telecommunication Technologies and Mathematical Modeling of High-Tech Systems, ITTMM-WSS 2018

作者： Zaripova, Elvira R. Yu. Grebeshkov, Alexander Orlov, Yurii N. Shorgin, Vsevolod S. 6 Miklukho-Maklaya st. Moscow117198 Russia Department of Automatic Telecommunication Povolzhskiy State University of Telecommunications and Informatics 23 Leo Tolstoy str. Samara443010 Russia Department of Kinetic Equations Keldysh Institute of Applied Mathematics Russian Academy of Sciences 4 Miusskaya Sq. Moscow125047 Russia Institute of Informatics Problems Federal Research Center "Computer Science and Control" Russian Academy of Sciences 44-2 Vavilova st. Moscow119333 Russia

We analyze the possibilities of using the cognitive radio standard IEEE 802.22. Temporarily unoccupied channels can be used for transferring information where 3GPP LTE service becomes impossible. The technology is very actual in sparsely populated areas. The current paper offers a complete vertical handover procedure from 3GPP LTE to the cognitive radio network IEEE 802.22 with the IP address preserved for easy user recognition. The procedure includes the authorization phase, registration, authentication and connection. The proposed procedure includes Care-of-Address Function for saving an IP address, which will be useful for mobile users. The main idea of proposed vertical handover procedure is saving of a temporary IP address. The vertical handover procedure based on entities from 3GPP LTE network and target IEEE 802.22 WRAN network. This procedure consist from 45 signaling messages (requests and responses) between mobile terminal, ANDSF function, Service Gateway and Packet Data Network Gateway, Base Station IEEE 802.22 and some other entities. Copyright © 2018 for the individual papers by the papers’ authors.

关键词： Cognitive radio

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Robust coalitional distributed model predictive control algorithm with stability via terminal constraint

Robust coalitional distributed model predictive control algo...

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IEEE Conference on control Technology and Applications

作者： A. Maxim J. M. Maestre C. F. Caruntu C. Lazar Department of Electrical energy Metals Mechanical Constructions and Systems Ghent University Ghent Belgium Department of Systems and Automation Engineering University of Seville Spain Department of Automatic Control and Applied Informatics ‘Gheorghe Asachi’ Technical University of Iasi Iasi Romania

This paper proposes a robust coalitional distributed model predictive control algorithm suitable for input coupled sub-systems. The core idea is based on a distributed iterative implementation with minimum information exchange, in which the coupling information is regarded as bounded additive uncertainty. If the disturbance received from the neighbours is too large for the local optimization problem, then a coalitional strategy is adopted. The closed-loop stability is guaranteed via terminal constraint. The performance of the coalitional strategy is compared with an iterative min-max distributed model predictive controller and a centralized model predictive controller.

关键词： performance coalitional strategy compared

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