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12th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing, CCGrid 2012

作者： Dragoicea, Monica Bucur, Laurentiu Tsai, Wei-Tek Sarjoughian, Hessam Faculty of Automatic Control and Computers POLITEHNICA University Spl. Independentei nr. 313 Bucharest Romania School of Computing Informatics and Decision Systems Engineering Arizona State University Tempe AZ 85287 United States

ISBN: (纸本)9780769546919

The High-Level Architecture (HLA) is the de-facto standard in simulation interoperability. This paper presents a possible way for HLA to integrate with a service-oriented architecture (SOA) in the context of a smart building project. The paper discusses the design of an HLA federate for the inclusion of a service oriented smart building controller in the simulation loop. © 2012 IEEE.

关键词： Intelligent buildings

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Spatio-temporal error concealment algorithms for encoded video streams for real-time applications

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International Journal of computers and Applications 2012年第2期34卷 105-118页

作者： Sarhan, Amany Mahmoud, Rasha O. Faheem, Mohamed T. Computers and Automatic Control Engineering Department Faculty of Engineering Tanta University Egypt Computer Science Department Nile Institute of Commerce and Computer Technology Mansoura Egypt Computers and Automatic Control Engineering Department Faculty of Engineering Taief University Saudi Arabia

Multimedia is one of the most important aspects of the information era. With the advent of the multimedia age and the spread of Internet, video storage and streaming has been gaining a lot of popularity. When transmitting compressed video over a data network channel errors affect the decoding process. Video transmission puts constraints on data rate, computational complexity and delay. Unreliable channels add more challenges to this task as compressed video is extremely vulnerable to transmission errors. Problems arising from imperfect transmission of block coded video frame sequence result in lost blocks. This paper presents and implements a set of decoder side spatio-temporal algorithms that aim to enhance the speed and quality of the error concealment process. The results obtained by these algorithms are much faster and achieve better performance compared to the existing algorithms, which make them more suitable for real-time applications.

关键词： Image communication systems

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Transformer's automatic local voltage control in electrical power systems

UPB Scientific Bulletin, Series C: Electrical Engineering

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UPB Scientific Bulletin, Series C: Electrical engineering 2012年第4期74卷 67-78页

作者： Constantin, Iulia Cristina Constantin, Costel Iliescu, Sergiu Stelian Automatic Control and Computers Faculty University Politehnica of Bucharest Romania Power Engineering Faculty University Politehnica of Bucharest Romania

In order to maintain in tolerable ranges the voltages of a power system the centralized and the local regulation are combined. The paper is proposing to relieve the importance of the local regulation/control, maintaining in tolerable ranges the voltages in a specified bus of a power system using the power transformers/autotransformers equipped with an automatic voltage control device. The paper also proposes a solution for implementing and setting an automatic voltage control device for a substation of the national power system, in which is not implemented for the moment this kind of regulating solution, and analyze the its behavior for different operating conditions. The study was made in a very important 400/220/110 kV substation of the transmission network of the Romanian National Power System on a 400/220 kV and 400 MVA autotransformer. Copyright © 2009 Universitatea Politehnica Bucuresti.

关键词： Power transformers

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Supervised multi-agent control of leather manufacturing processes by using the fuzzy logic

Leather and Footwear Journal

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Leather and Footwear Journal 2012年第2期12卷 101-112页

作者： Hanchevici, Arian-Bogdan Guta, Sergiu-Adrian Faculty of Automatic Control and Computers Department of Automatic Control and System Engineering Politehnica University of Bucharest Romania INCDTP Division: Leather and Footwear Research Institute 93 Ion Minulescu Bucharest Romania

In this paper we propose a supervised multi-agent control strategy for leather manufacturing processes. In a tannery numerous processes are performed and in order to control them we use an agent for each process. Due to the control from distance, the systems are affected by varying communication delays which can affect the quality of the final product. The supervisor is used to adjust, by using the fuzzy logic, the command provided by each agent. Simulation results are presented. The results show performance improvement when our control strategy is used.

关键词： Fuzzy logic

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Comparative Study of Three Phase 3-Leg Active Power Filters Connected to 4-Wire Electrical systems

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Journal of Energy and Power engineering 2012年第9期6卷 1527-1535页

作者： Ciprian Balanuta Gelu Gurguiatu Toader Munteanu Grigore Fetecau Olimpia Grozavu Department of A utomatic Control and Electrical Engineering Faculty of Automatic Control Computers Electrical and ElectronicsEngineering "Dun(trea de los" University Gala l~" 800008 Romania

This paper presented the simulation results of the three phase electrical systems supplied by four wires with power quality problems, to which the parallel 3-leg APF （active power filters） are connected. The purpose of this study is to analyze the results obtained in these conditions in order to observe the limits of the 3-leg active power filters and to form a foundation for the future studies of the 4-leg active power filters. For a complete analysis, the APF will be controlled by four control methods： synchronous reference system control, indirect control, instantaneous p-q theory control, and positive sequence control. The analysis will watch the power quality indicators： THD （total harmonic distortion factor）, PF （power factor）, Iunb （unbalance factor）.

关键词： Power quality active power filter control method.

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Least-squares design of 2-D sparse nonseparable filter banks using transformation of variables: A greedy approach

Least-squares design of 2-D sparse nonseparable filter banks...

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European Signal Processing Conference (EUSIPCO)

作者： Bogdan C. Şicleru Bogdan Dumitrescu Department of Automatic Control and Systems Engineering Faculty of Automatic Control and Computers Politehnica University of Bucharest Bucharest Romania Tampere Int. Center for Signal Processing Tampere University of Technology Tampere Finland

We present in this paper a design method for two-dimensional two-channel sparse nonseparable FIR filter banks using transformation of variables. In a first phase the transformation function is designed in a least-squares fashion. The second stage of the algorithm introduces the sparseness in a greedy manner by removing at each step the minimum coefficient of the filter in absolute value. The obtained results show that the sparse filter banks offer the possibility of choosing the complexity of the filters and have also better stopband energy.

关键词： Finite impulse response filter Optimization Algorithm design and analysis Greedy algorithms Polynomials Nickel Passband

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Improving micro-grid power quality using three-phase four-wire active power conditioners

Improving micro-grid power quality using three-phase four-wi...

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

作者： C. Balanuta I. Vechiu G. Gurguiatu Faculty of Automatic Control Computers Electrical and Electronics Engineering Department of Automatic Control and Electrical Engineering Dunãrea de Jos Galati University Romania ESTIA-Recherche Bidart France

In this paper is presented a comparative analysis between two power conditioners connected to a four-wire micro-grid. The first one was developed on a two levels voltage structure and the second one on a three-level voltage NPC structure (Neutral Point Clamped), both controlled by the same strategy. The main objective of the proposed strategy is to limit the disturbance produced by different loads. Another goal is to act as an interface between renewable energy sources and the micro-grid. In this study, about 25% of the power requested by the load comes from the renewable energy sources. The investigated systems have been implemented in Matlab / Simulink, in order to analyze the micro-grid harmonic level, the power factor and the voltage unbalance at the point of common coupling.

关键词： Active filters Power quality Harmonic analysis Switches automatic voltage control

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Hardware and software solutions for a conventional electric-powered wheelchair

Hardware and software solutions for a conventional electric-...

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

作者： Ciprian Marian Chipaila Daniel Grigore Gheorghita Marin Razvan Solea Daniela Cristina Cernega Faculty of Automatic Control Computers Electric and Electronic Engineering “Dunarea de Jos” University of Galati Romania

In this paper is presented a hardware and software solution for controlling an electric-powered wheelchair for persons with disabilities. It was implemented an odometric system using two encoders and the programmable environment Matlab/Simulink, also it has been design an PI controller for the DC motors. It is also presented an obstacle avoidance system using an laser sensor. To verify the effectiveness of proposed solution, experiments were carried out. The wheelchair platform considered in this paper is a differential drive platform with two passive front caster wheels and two active rear wheels.

关键词： Wheelchairs DC motors MATLAB Wheels Mathematical model Collision avoidance Robots

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control system simulation for endoscopie surgical manipulator based on virtual chain approach

Control system simulation for endoscopie surgical manipulato...

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2012 1st International Conference on Innovative engineering systems, ICIES 2012

作者： Ibrahim, Khalil Ramadan, Ahmed Farmi, Mohamed Kobayashi, Yo Abo-Ismail, Ahmed Fujie, Masakatus G. Mechatronics and Robotics Engineering Egypt-Japan University of Science and Technology Alexandria Egypt Computers and Automatic Control Engineering Dep. Tanta University Tanta Egypt Mechanical Department Mansoura University Mansoura Egypt Faculty of Science and Engineering Waseda University Tokyo Japan

ISBN: (纸本)9781467344388

This paper deals with the design process and the dynamic control simulation of a new type of 4-DOFs parallel mechanism that can be used as an endoscopie surgical manipulator. The proposed mechanism, 2-PUU 2PUS, is designed based on the screw theory and the parallel virtual chain type synthesis method. Based on the structure analysis of the 4-DOF parallel mechanism, the inverse position equation is studied using the inverse analysis theory of kinematics. The design and the stress analysis of the mechanism are investigated using SolidWorks software. The virtual prototype of the parallel mechanism is constructed, and the dynamic simulation is performed using ADAMS™ software. The system model utilizing PID and PI controllers has been built using MATLAB software. A more realistic simulation in accordance with a given bending angle and point to point control is implemented by the use of both ADAMS/MATLAB software. The simulation results showed that this control method has solved the coordinate control for the 4-DOF parallel manipulator so that each output is feedback to the four driving rods. From the results, the tracking performance is achieved. Other control techniques, such as intelligent ones, are recommended to improve the tracking performance and reduce the numerical truncation error. © 2012 IEEE.

关键词： MATLAB

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Ant Colony Based Model Prediction of a Twin Rotor System

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Procedia engineering 2012年 41卷 1135-1144页

作者： S.F. Toha S. Julai M.O. Tokhi Department of Mechatronics Faculty of Engineering International Islamic University Malaysia Malaysia Department of Mechanical Faculty of Engineering University Malaya Malaysia Department of Automatic Control Systems and Engineering University of Sheffield UK

Interest in biologically-inspired optimization techniques has increased due to its accurate results, fast performance and ease of use. In this paper, an ant colony optimization (ACO) technique is deployed and used for modelling a twin rotor system. The system is perceived as a challenging engineering problem due to its strong cross coupling between horizontal and vertical axes and inaccessibility of some of its states and outputs for measurements. Accurate modelling of the system is thus required so as to achieve satisfactory control objectives. It is demonstrated that ACO can be effectively used for modelling the system with highly accurate results. The accuracy of the modelling results is demonstrated through validation tests including training and test validation and correlation tests.

关键词： Ant colony optimisation Parametric modelling Twin rotor system Auto Regressive model

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