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13th WSEAS International Conference on automatic control, Modelling and Simulation, ACMOS'11

作者： Janáčová, Dagmar Charvátová, Hana Kolomazník, Karel Vašek, Vladimír Mokrejš, Pavel Drga, Rudolf Department of Automatic Control Faculty of Applied Informatics Tomas Bata University in Zlin Nám. T. G. Masaryka 5555 760 01 Zlín Czech Republic Protein and Leather Department Faculty of Technology Tomas Bata University in Zlin Nám. T. G. Masaryka 5555 760 01 Zlín Czech Republic

ISBN: (纸本)9781618040046

The paper contents the optimization of the washing processes which are characterized by large consumption of water and electrical energy mainly. For this reason is very important deal with them. For the optimization process of washing it is possible to set up an access of the indirect modeling that is based on make-up of mathematical models coming out of study of the physical operation mechanism. The process is diffusion character it is characterized by the value of diffusion effective coefficient and so called structure power of the removing item to the solid phase. The mentioned parameters belong to input data that are important for the automatic control of washing process.

关键词： Washing

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Coupling electromagnetic (FE) models to multidomain simulator to analyse eletrical drives and complex control systems

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Archives of Electrical Engineering 2010年第3-4期59卷 189-201页

作者： Jagiela, Mariusz Garbiec, Tomasz Faculty of Electrical Engineering Automatic Control and Computer Science Opole University of Technology Ul. Luboszycka 7 45-036 Opole Poland

This work presents the co-simulation approach to the analysis of control systems containing detailed models of electromagnetic and electromechanical converters. In this method of analysis the attention is paid to the whole system and not only to its electromagnetic part. The latter is described by equations resulted from the two-dimensional finite element discretisation of the Maxwell equations, and is coupled weakly with the remaining part of the system. The simulation is carried out in Matlab/Simulink environment wherein the coupling is realised through the S-function. Example results regarding simulation of the operation of the control system of an electrical machine and the operation of a power electronic converter are presented and compared with available reference data.

关键词： Finite element method

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A probabilistic abstraction approach for planning and controlling mobile robots

A probabilistic abstraction approach for planning and contro...

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Marius Kloetzer Cristian Mahulea Octavian Pastravanu Department of Automatic Control and Applied Informatics Technical University Gh. Asachi Iasi Romania Aragón Institute of Engineering Research (I3A) University of Zaragoza Spain Department of Aut. Control and Applied Information Technology University Gh. Asachi of Iasi Romania

The paper presents a procedure for creating a probabilistic finite-state model for a mobile robot and for finding a sequence of controllers ensuring the highest probability for reaching a desired region. The approach starts by using results for controlling affine systems in simpliceal partitions, and then it creates a finite representation with history-based probabilities on transition. This representation is embedded into a Petri Net model with probabilistic costs on transitions, and a highest probability path to reach a target region is found. This probabilistic framework is suitable for controlling mobile robots based on more complex specifications.

关键词： Trajectory Mobile robots Computational modeling Probabilistic logic Feedback control Planning

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Hierarchical control scheme for voltage Harmonics Compensation in an islanded droop-controlled microgrid

Hierarchical control scheme for voltage Harmonics Compensati...

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International Conference on Power Electronics and Drive Systems (PEDS)

作者： Mehdi Savaghebi Josep M. Guerrero Alireza Jalilian Juan C. Vasquez Tzung-Lin Lee Center of Excellence for Power System Automation and Operation Iran University of Science and Technology Iran Department of Automatic Control and Industrial Informatics Technical University of Catalonia Spain Institute of Energy Technology University of Aalborg Denmark Department of Electrical Engineering National Sun Yat-sen University Taiwan

In this paper, a microgrid hierarchical control scheme is proposed which includes primary and secondary control levels. The primary level comprises distributed generators (DGs) local controllers. The local controller mainly consists of active and reactive power controllers, voltage and current controllers, and virtual impedance loop. A novel virtual impedance structure is proposed to achieve proper sharing of non-fundamental power among the microgrid DGs. The secondary level is designed to manage compensation of voltage harmonics at the microgrid load bus (LB) to which the sensitive loads may be connected. Also, restoration of LB voltage amplitude and microgrid frequency to the rated values is directed by the secondary level. These functions are achieved by sending proper control signals to the local controllers. The simulation results show the effectiveness of the proposed control scheme.

关键词： Harmonic analysis Voltage control Power harmonic filters Impedance Frequency control Resistance

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A novel approach for protein spots quantification in two-dimensional gel images

International Journal of Signal Processing, Image Processing...

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International Journal of Signal Processing, Image Processing and Pattern Recognition 2011年第1期4卷 1-14页

作者： Rashwan, Heshmat A. Sarhan, Amany M. Faheem, Muhammed Talaat Youssef, Bayumy A. Knowledge-Based Systems Department Informatics Research Institute Mubarak City for Science and Technology Borg ElArab Alexandria Egypt Computers and Automatic Control Engineering Department Faculty of Engineering University of Tanta Tanta Egypt Computer-Based Applications Department Informatics Research Institute Mubarak City for Science and Technology Borg ElArab Alexandria Egypt

Two-dimensional polyacrylamide gel electrophoresis of proteins is a robust and reproducible technique. It is the most widely used separation tool in proteomics. Current efforts in the field are directed at development of tools for expanding the range of proteins accessible with two-dimensional gels. Proteomics was built around the two-dimensional gel. The idea that multiple proteins can be analyzed in parallel grew from two-dimensional gel maps. Proteomics researchers needed to identify interested protein spots by examining the gel. This is time consuming, labor extensive and error prone. It is desired that the computer can analyze the proteins automatically by first detecting then quantifying the protein spots in the 2-D gel images. In our previous work, we presented a new technique for segmentation of 2-D gel images using the fuzzy c-means algorithm using the notion of fuzzy relations. In this paper, we will describe the new relational fuzzy c-means algorithm (RFCM) and use it for automatic protein spots quantification. We will also use two methods to evaluate its performance: the unsupervised evaluation method and comparison with the expert spots quantification.

关键词： Proteins

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Development of FE-based computer-assisted design system for induction machines

Development of FE-based computer-assisted design system for ...

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International Conference on Electrical Machines

作者： Jagiela, Mariusz Macek-Kaminska, Krystyna Opole University of Technology Department of Electircal Engineering Automatic Control and Computer Science ul. Luboszycka 7 45-371 Opole Poland

ISBN: (纸本)9781424441754

This paper describes the software environment for computer assisted design of three-phase squirrel cage induction machines. The finite element method is used as a computational technique to account for detailed geometrical properties, skew, material nonlinearity and deep-bar effect. The system enables determination of all electromagnetic quantities that are usually of interest of the designers of electrical machines. Besides of that it enables the design optimization. The design of experiment is used as a principal method. Sample results of calculations compared with measurements and sample design optimization are presented. ©2010 IEEE.

关键词： Finite element method

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Aging properties of fullerene doped transformer oils

Aging properties of fullerene doped transformer oils

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International Symposium on Electrical Insulation

作者： P. Aksamit D. Zmarzly T. Boczar M. Szmechta Faculty of Electrical Engineering Automatic Control and Informatics Opole University of Technology Opole Poland

In paper the influence of thermal oxidation on nano-modified transformer oil is analyzed. The probes of mineral transformer were doped with different content of C 60 fullerenes from 0 mg/l to 512 mg/l. One set of probes were then aged for 64 hours in the temperature of 110°C with the presence of copper inhibitor. Oil parameters such us: resistivity, dielectric loss tangent and permittivity were measured for each probe set. The influence of C 60 additive on individual characteristics of fresh and aged oil was analyzed.

关键词： Aging Oil insulation Probes Dielectric loss measurement Petroleum Oxidation Minerals Temperature Copper Inhibitors

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Acoustic emission measurements of ultrasound induced cavitation bubbles in aged insulating oils

Acoustic emission measurements of ultrasound induced cavitat...

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International Symposium on Electrical Insulation

作者： Marek Szmechta Tomasz Boczar Dariusz Zmarzły Paweł Aksamit Department of Electrical Engineering Automatic Control and Informatics Opole University of Technology Opole Poland

The paper presents the behavior of ultrasound induced cavitation voids and bubbles in mineral insulating oils with different aging properties. At suitable values of signal amplitude and frequency many of cavitation bubbles were observed. Collapsing bubbles were responsible for broadband noise included in acoustic emission signal spectra. To represent the cavitation intensity a cavitation indicator based on power spectral densities of acoustic emission signal was proposed.

关键词： Acoustic emission Acoustic measurements Ultrasonic variables measurement Ultrasonic imaging Aging Oil insulation Minerals Petroleum Frequency Power transformer insulation

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Investigation of end-winding proximity losses in electromagnetic devices

Investigation of end-winding proximity losses in electromagn...

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International Conference on Electrical Machines

作者： Wrobel, Rafal Mlot, A. Mellor, P.H. Department of Electrical and Electronic Engineering University of Bristol Bristol BS8 1TR United Kingdom Department of Electrical Engineering Automatic Control and Informatics Technical University of Opole Opole 45-036 Poland

ISBN: (纸本)9781424441754

This paper presents an investigation into proximity losses in end-windings informed from the 3D finite element analysis of an ac power inductor. The proximity effect in winding conductors is a result of circulating ac currents caused by magnetic fields generated by nearby conductors. The calculated results confirm that the effects within the end-winding whist significant are lower compared to those with the active length of the conductors. The common approach of predicting proximity losses usind 2D field analyses accounts for active length of the conductors only, and therefore an endwinding correction factor is needed to obtain a more accurate estimate of loss. The theoretical prediction of losses within the inductor has been validated experimentally on a prototype inductor. The effect of winding temperature on proximity loss is also discussed. ©2010 IEEE.

关键词： Electric inductors

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Development of FE-based computer-assisted design system for induction machines

Development of FE-based computer-assisted design system for ...

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International Conference on Electrical Machines, ICEM

作者： Mariusz Jagiela Krystyna Macek-Kaminska Department of Electrical Engineering Automatic Control and Computer Science Opole University of Technology Opole Poland

关键词： Rotors Windings Induction motors Mathematical model Stator windings Optimization Finite element methods

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