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

作者： Mihai Postolache Gabriel Neamtu Sorin Dumitru Trofin “Gheorghe Asachi” Technical University of Iasi Faculty of Automatic Control and Computer Engineering Iasi Romania

This paper presents the design and practical implementation of a gateway interface between two networks, CAN and Ethernet. Data packets detected over a network will be routed to the other network, with the possibility of using various filters. Since there is no standard yet for this purpose, the paper also proposes a method to pack one or more CAN messages in an Ethernet frame. For testing purposes of the interface gateway and its implementation a series of graphical software tools running on a PC client have been developed. These tools are able to send and decode messages using the specified packaging. At the end of the paper a graphical application demonstrates the functionality of the gateway implementation and the benefits of the proposed CAN-Ethernet routing method.

关键词： Logic gates Protocols IP networks Ports (computers) Hardware Standards Operating systems

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Level Fuzzy control of Three-Tank System

Level Fuzzy Control of Three-Tank System

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International Conference on control Systems and computer Science (CSCS)

作者： Lucian Mastacan Constantin-Catalin Dosoftei Faculty of Automatic Control and Computer Engineering Gheorghe Asachi Technical University of Iasi Iasi Romania

ISBN: (纸本)9781467361408

Look-up decisions tables are favorites in fuzzy control when a complex algorithm of fuzzy rules inference is an impediment for a real time application. The control values of look-up tables are fuzzy singletons in finite number. It is difficult to obtain the best fuzzy control performance in these conditions. The look-up tables can be assimilated to sparse fuzzy rule bases. A linear interpolation method applied in a look-up decision table increase to a large number the fuzzy control values. In this way the fuzzy control performance can be improved. A level fuzzy control of three-tank system is implemented to validate the proposed method.

关键词： Fuzzy control Fuzzy logic Interpolation Process control Table lookup Tuning Pragmatics

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Shortening of the Automata Cycle of Industrial Communication System Nodes

Shortening of the Automata Cycle of Industrial Communication...

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2013 2nd International Conference on Advances in computer Science and engineering(CSE 2013)

作者： Marcin Sidzina Andrzej Kwiecień Jacek Stój Faculty of Mechanical Engineering and Computer Science University of Bielsko-Bia?a Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology

The distributed computer systems applied in industry are usually of the real-time type. In those systems the maximal system response time has to be always well known in order to ensure the functional as well as the safety parameters of the system. However, the system response time may be subject to change as a result of system development during its life cycle. As the given system grows, the response time lengthens. So it happens that in order to satisfy the real-time constraints, the response time T RES has to be reduced after the system development. One of the factors that have an influence on the T RES time, is the automata cycle of the communication system nodes. The shorter the automata cycle is, the more frequent is the data exchange between the CPU module and the communication module of the given system node, which improves the T RES value. However, having the node's application well implemented, shortening of the automata cycle may seldom be done by the application optimization. Then, the only solution would be to temporary shorten the automata cycle by execution of some of the most crucial parts of the user application. In this paper, a method for shortening the automata cycle is described.

关键词： automata cycle events avalanche events burst communication network distributed real-time system programmable logic controller PLC real-time temporal determinism

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Computationally efficient method of simulation of an electric drive impact on the power grid

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Archives of Electrical engineering 2013年第1期62卷 77-90页

作者： Beniak, Ryszard Gardecki, Arkadiusz Opole University of Technology Faculty of Electrical Engineering Automatic Control and Computer Science Sosnkowskiego 31 45-272 Opole Poland

This paper presents a computationally efficient method for modelling an impact of the converter drive on the power grid. The formalized variable structure method (FVSM) allows for comprehensive studies of the effect on the power grid and examining the relation between this effect and the number of drive and feeding line parameters. In order to obtain a comprehensive model along with the model of the power grid, the parameters that are applied originate from a drive of a coal-fired power station. These parameters have been determined based on assessment and estimation. The estimation process was conducted with the aid of a model that allows for the commutation of power electronic elements. The authors confirmed that the model was correct by comparing empirical and theoretical voltage and current waveforms. Harmonic content of the voltage and current in the power grid which feeds the drive are considered to be the measure of the converter drive impact on the power grid. The standard method for the reduction of a harmonic content in the voltage and current involves the application of line reactors and distribution or converter transformers. As an example, the authors determine the impact of the drive on the power grid with respect to the adopted parameters of the line reactor. This example presents FVSM abilities with regard to simulation of complex systems that contain power grid components and converter drives.

关键词： Electric drives

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Linear Quadratic Regulator for the Three-Phase Grid Connected Power Converter

Linear Quadratic Regulator for the Three-Phase Grid Connecte...

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The Second International Conference on Micro Nano Devices,Structure and Computing Systems(MNDSCS 2013)

作者： Marian Gaiceanu Dunarea de Jos University of Galati Faculty of Automatic Control Computer Science Electrical and Electronics Engineering

This paper proposes a combined power quality-optimal control of the three-phase grid connected power converter. By using the technique of decoupling control, the mathematical model of the three-phase power converter is developed in the dq rotating reference frame and it is linearized around the operating point. The optimal control problem is with free-end point, infinite time horizon, and without constraints. The proposed optimal control is obtained as a solution of the Algebraic Riccati Equation. The numerical simulations based on the Matlab/Simulink software show the validity of the proposed solution.

关键词： optimal control grid connected power inverter power quality Matlab/Simulink

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Neural Network Approximations of Solution Concepts for Multiagent Coalitions

Neural Network Approximations of Solution Concepts for Multi...

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International Symposium on Parallel and Distributed Computing

作者： Florin Leon Andrei Marius Burlacu Faculty of Automatic Control and Computer Engineering “Gheorghe Asachi” Technical University of Iaşi Iaşi Romania

ISBN: (纸本)9781479907342

Coalition formation is an important aspect of multiagent systems because it enables agents to achieve goals more efficiently or goals they cannot accomplish individually. In this paper we consider an approximate method based on neural networks to estimate two important values used for dividing the payoff of a coalition, namely the Shapley value and the nucleolus. We try several neural network topologies and different training algorithms and evaluate the behavior of an especially designed multiagent system when the payoff values are computed by exact and approximate methods.

关键词： Distributed computing

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Constrained State-Feedback control of an Externally Excited Synchronous Machine

Constrained State-Feedback Control of an Externally Excited ...

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Mediterranean Conference on control & Automation

作者： Sabin - Constantin Carpiuc Mircea Lazar Faculty of Automatic Control and Computer Engineering Technical University "Gheorghe Asachi" of Iasi Department of Electrical Engineering Eindhoven University of Technology

ISBN: (纸本)9781479909964

State-feedback control of externally excited synchronous machines employed in applications such as hybrid electric vehicles and full electric vehicles is a challenging problem. Indeed, these applications are characterized by fast dynamics that are subject to hard physical and control constraints. The goal of this paper is to provide a controller synthesis method that can answer these challenges effectively. To this end, firstly, a linear control law is obtained for the unconstrained dynamics via a standard control Lyapunov function (CLF), along with an admissible basin of attraction. Then, a piecewise affine control law defined on a cubic partition of the state-space is obtained for the constrained dynamics via a flexible CLF. An a posteriori test for checking stability and invariance of a set of initial conditions for the resulting closed-loop dynamics is also proposed. The effectiveness of the developed synthesis method is demonstrated in a realistic simulation scenario.

关键词： state feedback control synchronous machines feedback control region of attraction chlorofibre Hybrid electric vehicles Peptide Synthesis Technique Organic Synthesis Techniques Inorganic Synthesis Techniques control law invariance dynamics INITIAL CONDITIONS all-electric

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Selecting sensor for on load tap changer contacts degree of wear diagnostics

Selecting sensor for on load tap changer contacts degree of ...

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作者： Cichoń, A. Boruckia, S. Bergerb, P. Faculty of Electrical Engineering Automatic Control and Computer Science Opole University of Technology Prószkowska 76 45-758 Opole Poland TurboCare Poland S.A. Powstańców slĄskich 85 42-701 Lubliniec Poland

Results of scientific research works considering selection of measuring transducer applied for registration of acoustic emission signals generated by on load tap changers are presented in the paper. During the coupling process acoustic emission signals are generated by: the mechanical setup of tap changer, contacts operation, and other phenomena. For most on load tap changers types, the working medium is insulation oil in which the acoustic wave being formed propagates to the steal tank. There exists a possibility to register acoustic emission signals with a piezoelectric transducer attached to the outer tank surface or with a hydrophone immersed in the oil. Acoustic emission signal obtained in such manner contains information which describes operation of the power tap changer and the selector. A comparative analysis of acoustic emission signals generated by on load tap changers working under laboratory conditions, with applied measuring transducers with different transmittances, is presented in the paper. The comparative analysis was performed in order to determine their suitability for on load tap changers technical condition diagnosis. Based on the results achieved, one transducer which allows the registration of acoustic events generated during on load tap changers operation was selected.

关键词： Tanks (containers)

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Hardware Acceleration in Ceph Distributed File System

Hardware Acceleration in Ceph Distributed File System

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International Symposium on Parallel and Distributed Computing

作者： Pistirica Sorin Andrei Moldoveanu Florica Moldoveanu Alin Asavei Victor Caraman Mihai Claudiu Faculty of Automatic Control and Computer Science University Politehnica of Bucharest Bucharest Romania Faculty of Electrical Engineering and Computer Science Transylvania University of Brasov Brasov Romania

ISBN: (纸本)9781479907342

Cloud computing becomes more and more popular providing the means to organize and deliver almost any kind of data and software services. Since it is inherently scalable to support rapid economic growth and productivity, its distributed data storage layer needs to be capable to address these requirements. A distributed file system contains a large number of cluster nodes and a large number of clients interacting with it. In this article, we propose two acceleration mechanisms based on multi-core network SoC to maximize each cluster node performance. First, the requests to the cluster node are balanced evenly on the platform cores, and second the requests are classified to decrease latency of sensitive operations and improve the overall cluster responsiveness and availability. For implementation, tests and measurements we have used a novel open source distributed file system: Ceph. Among many advantages over the competitors of Ceph we mention preservation of POSIX API, completely decoupled data and metadata and usage of object storage devices instead of block devices.

关键词： Hardware System-on-chip Engines Monitoring File systems Multicore processing

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The influence of ultrasound signal parameters on sonoluminescence light intensity

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Archives of Electrical engineering 2013年第4期62卷 605-612页

作者： Szmechta, Marek Boczar, Tomasz Zmarzly, Dariusz Faculty of Electrical Engineering Automatic Control and Computer Science Institute of Electric Power Engineering Opole University of Technology Prószkowska 76 45-758 Opole Poland

Topics of this article concern the study of the fundamental nature of the sonoluminescence phenomenon occurring in liquids. At the Institute of Electrical Power engineering at Opole University of Technology the interest in that phenomenon known as secondary phenomenon of cavitation caused by ultrasound became the genesis of a research project concerning acoustic cavitation in mineral insulation oils in which a number of additional experiments performed in the laboratory aimed to determine the influence of a number of acoustic parameters on the process of the studied phenomenona. The main purpose of scientific research subject undertaken was to determine the relationship between the generation of partial discharges in high-voltage power transformer insulation systems, the issue of gas bubbles in transformer oils and the generated acoustic emission signals. It should be noted that currently in the standard approach, the phenomenon of generation of acoustic waves accompanying the occurrence of partial discharges is generally treated as a secondary phenomenon, but it can also be a source of many other related phenomena. Based on our review of the literature data on those referred subjects taken, it must be noted, that this problem has not been clearly resolved, and the description of the relationship between these phenomena is still an open question. This study doesn't prove all in line with the objective of the study, but can be an inspiration for new research project in the future in this topic. Solution of this problem could be a step forward in the diagnostics of insulation systems for electrical power devices based on non-invasive acoustic emission method.

关键词： Sonoluminescence

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