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22nd International Conference on Computer Applications in Industry and engineering 2009, CAINE 2009

作者： Sheta, A. Öznergiz, E. Abdelrahman, M.A. Babuska, R. Giza Egypt Automatic Control Department Mechanical Engineering Faculty Istanbul Technical University Istanbul 34437 Turkey Electrical and Computer Engineering Department Tennessee Technological University Cookeville TN 38505 United States Delft Center for Systems and Control Delft University of Technology Netherlands

ISBN: (纸本)9781615676668

Steel making is known as a complex manufacturing industrial process. Automation of the process represents a challenge. Empirical mathematical modeling of the process was used to design mill equipment, ensure productivity and service quality. This modeling approach shows many problems associated to complexity and time consumption. Soft computing techniques show significant modeling capabilities on handling complex nonlinear systems modeling. In this paper, we explore the use of Takagi-Sugeno (TS) technique to develop fuzzy models for the Hot-Rolling industrial nonlinear process. We propose three models for the rolling force, torque and slab temperature. A set of rules and membership functions which represents the dynamical relationship between the input and output of these models shall be presented. The performance of the fuzzy models will be compared to the known empirical models for the hot rolling system. Experimental data measured from the Ere˜gli Iron and Steel Factory in Turkey shall be used for the verification of the model outstanding performance.

关键词： Hot rolling

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A market based approach for complex task allocation for wireless network based multi-robot system

A market based approach for complex task allocation for wire...

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XXII International Symposium on Information, Communication and Automation Technologies, ICAT

作者： Merid Ljesnjanin Jasmin Velagic Department of Automatic Control and Electronics Sarajevo Bosnia and Herzegovina Department of Automatic Control and Electronics Faculty of Electrical Engineering Sarajevo Bosnia and Herzegovina

Market based approach (MBA) provides communication and coordination for robots in a virtual economy in which they can exchange tasks and resources for payment. Furthermore, trades are enabled via market mechanisms such as auction protocols in which an auctioneer is able to determine the robots best capable of achieving the tasks being offered. In this paper we purpose a modification of MBA for task allocation. This approach consists of auction announcement, bid valuation and submission and winner determination. Several scenarios where robots need to visit particular locations with time and range of wireless network constraints are used for approach verification. Additionally, the results obtained by this approach are compared with results from approach in control and coordination of mobile motes (CCMM).

关键词： Wireless networks Multirobot systems Robot kinematics Protocols Contracts Consumer electronics Humans Robotics and automation Technological innovation Performance evaluation

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Polarity reversal in streaming electrification measurements

Polarity reversal in streaming electrification measurements

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Conference on electrical Insulation and Dielectric Phenomena, (CEIDP)

作者： D. Zmarzly P. Aksamit Faculty of Electrical Engineering Automatic Control and Computer Science Opole University of Technology Poland

In the paper measurements of streaming electrification current in the range of low velocities are presented. The measurements were conducted in spinning disk system that uses wireless rotating electrometer. Using this system it is possible to measure electrification current in the range of several picoamperes. In proposed configuration the electrometer is installed in measurement object on the disk axle. The digital output is transferred using Bluetooth radio-frequency transceiver. This solution minimizes external disturbances and allows for measurement with standard uncertainty at the level of 30 fA depending on averaging time. The uncertainty slightly depends on spinning velocity. Several dependencies of averaged electrification current on rotational speed were shown. A fresh and C 60 fullerene doped transformer oil were used as an electrification source. It was observed that the electrification current can change its sign for different C 60 concentrations. Doping mineral oil leads to charge reversal in the electric double layer. The system presented in paper extends the range of possible research in the field of electrification on low velocities and can be useful in development of streaming electrification phenomena.

关键词： Current measurement Spinning Velocity measurement Rotation measurement Axles Bluetooth Radio frequency Transceivers Measurement uncertainty Time measurement

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Robust tracking with H∞ performance for PWM systems

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automatica 2009年第8期45卷 1808-1818页

作者： Fujioka, Hisaya Kao, Chung-Yao Almér, Stefan Jönsson, Ulf Graduate School of Informatics Kyoto University Kyoto 606-8501 Japan Department of Electrical Engineering National Sun Yat-Sen University Kaohsiung 80424 Taiwan Automatic Control Laboratory Swiss Federal Institute of Technology Zurich Physikstrasse 3 8092 Zurich Switzerland Division of Optimization and Systems Theory Royal Institute of Technology 10044 Stockholm Sweden

control synthesis for robust tracking is considered for a class of pulse-width modulated systems that appear, for example, in power electronics applications. The control objective is to regulate a high frequency ripple signal to robustly track a constant reference signal in an average sense. To achieve this goal, a new H∞ control problem with integral action and average sampling is proposed. The solution of this problem involves a hybrid lifting framework which requires a careful elaboration in order to develop an algorithm that allows one to solve the design problem by the standard state space formulas for H∞ control. The design procedure is verified on a synchronous buck converter. © 2009 Elsevier Ltd. All rights reserved.

关键词： Pulse width modulation

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Inclined ergometer to enhance fes-assisted indoor rowing exercise performance

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International Journal of Simulation: Systems, Science and Technology 2009年第7期10卷 16-25页

作者： Hussain, Z. Tokhi, M.O. Gharooni, S. Jailani, R. Kader Ibrahim, B.S.K. Faculty of Electrical Engineering Universiti Teknologi MARA Malaysia Department of Automatic Control and System Engineering The University of Sheffield United Kingdom

Improving the FES-assisted indoor rowing exercise (FES-rowing) performance enables the spinal cord injury (SCI) people to perform hybrid FES-exercise in a higher level of intensity. High level of exercise volume and intensity can play a big role in prevention of cardiovascular disease, type 2 diabetes and obesity which is a significant threat to the health of people with chronic SCI. FES-rowing can be enhanced to achieved the high level exercise through the arrangement of the rowing ergometer. In this paper, the performance of FES-rowing using an adjustable inclined rowing ergometer is investigated. Two different methods to enhance the FES-rowing performance using inclined ergometer are implemented. A model of the adjustable inclined ergometer and humanoid are developed using the Visual Nastran (vN4D) software environment and validated by the experimental work. Fuzzy logic control is implemented to control the knee and elbow trajectories for smooth rowing manoeuvre. The generated level of electrical stimulations for activation of quadriceps and hamstrings muscles are recorded and analysed. The FES-rowing efficiency for both methods have been defined and illustrated. The results show the inclined ergometer with upper body effort is the best performance in enhancing the FES-rowing.

关键词： Fuzzy logic

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Measurements of acoustic emission induced by partial discharges in foil-based capacitors for their quality assessment

Measurements of acoustic emission induced by partial dischar...

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19th IMEKO World Congress 2009

作者： Józwiak, Kazimierz Olesz, Marek Smulko, Janusz ZPR Miflex S.A. Kutno Poland Faculty of Electrical and Control Engineering Gdańsk University of Technology Gdańsk Poland Faculty of Electronics Telecommunications and Informatics Gdańsk University of Technology Gdańsk Poland

ISBN: (纸本)9781615675937

There is a continuous pressure to increase quality of the passive elements at reduction of their production costs. Therefore, present methods of their quality assessment have to be reconsidered to avoid usage of the elements that could break down and lead to serious economical losses. This paper compares results of capacitor tests introduced by the obligatory technical standards and measurements of acoustic emission induced by partial discharges within voids in foil-based capacitors. We suppose that presence of voids within dielectric and foil structures can lead to capacitor damage and can not be detected by measurements of dielectric loss or capacitance only.

关键词： Partial discharges

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Robust fuzzy fault detection for non-linear stochastic dynamic systems

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Open Automation and control Systems Journal 2009年第1期2卷 45-53页

作者： El-Ghatwary, Magdy G. Ding, Steven X. Industrial Electronic and Automatic Control Department Faculty of Electrical Engineering Menoufia University Menouf 32952 Menofia Egypt Institute for Automatic Control and Complex System University of Duisburg-Essen Germany

One of the difficults for fault detection techniques for non-linear stochastic systems via model-based methods is the design of residual generation. In this paper, a new fault detection (FD) approche for non-linear stochastic systems is proposed. The non-linear system is represented by a discrite Takagi-Sugeno (TS) fuzzy model. The use of (TS) theory allows to represent non-linear systems as a set of linear systems, which represent the local system behavior around different operating points. The global system behaviour is described by a fuzzy fusion of all systems. The FD system for each local sub system is designed by solving the corresponding Discrite Algebra Recati Equation (DARE). Optimization algorithm based on minimizing the residual covariance matrix is used to obtain a robust FD for global system behavior. The observer gain matrices are solved using a set of Linear matrix Inequalities (LMIs). © El-ghatwary and Ding;Licensee Bentham Open.

关键词： Fault detection

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Methodology of calculating electric energy losses in distribution networks for the needs of assessment of operation effectiveness of distribution companies

Methodology of calculating electric energy losses in distrib...

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International Conference on electrical Power Quality and Utilisation (EPQU)

作者： Barbara Kaszowska Andrzej Wloczyk Faculty of Electrical Engineering Automatic Control and Computer Science Opole University of Technology Opole Poland

Calculation of the energy losses is a very important problem for the distribution networks exploitation. The paper presents the linear model of the LV distribution network for the energy losses calculation. The comparison of calculation results for different ways of agregation of energy losses magnitudes are presented in the paper.

关键词： Energy loss Dielectric losses Batteries automatic control Computer science Energy measurement Fluid flow measurement Loss measurement Tin Information resources

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Adjusting stiffness of air spring and damping of oil damper using fuzzy controller for vehicle seat vibration isolation

Adjusting stiffness of air spring and damping of oil damper ...

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Siberian Conference on control and Communications (SIBCON)

作者： Senad Huseinbegovic Omer Tanovic Faculty of Electrical Engineering Department of Automatic Control and Electronics University of Sarajevo Sarajevo Bosnia and Herzegovina

In this paper we present one of the concepts of vehicle seat vibration damping, using a fuzzy controller. We used a fuzzy controller as a part of a semi-active vehicle suspension system, which consists of semi-active air spring and semi-active damper. System is implemented between the cabin floor and vehicle seat. Fuzzy controller is designed to adjust the stiffness of the air spring and damping of the oil damper, in order to isolate the vertical vibrations that are being caused by rough road surfaces. Input data for fuzzy controller are cabin floor acceleration, vehicle seat deflection and velocity of the vehicle seat deflection. Measure of the quality of suspension is the SEAT value, which is calculated as a quotient of effective seat vertical acceleration and effective cabin vertical acceleration (ISO 2631-1 standard).

关键词： Damping Springs Petroleum Shock absorbers Fuzzy control Vehicles Vibration control Acceleration Accelerometers ISO standards

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Machine Vision for Robot-Soccer Application

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IFAC Proceedings Volumes 2009年第1期42卷 161-166页

作者： Petr Wágner Department of Measurement and Control Faculty of Electrical Engineering and Informatics VŜB-Technical University of Ostrava Ostrava Czech Republic

This paper presents the computer image processing system for robot-soccer application. It presents and explains the main parts of robot-soccer image processing: image format conversion, pitch filtering, recognition of ball, recognition of color segments, and matching groups of segments with the robots. It also explains the main principles of image processing optimization: image data reduction, code optimization, and multi-core processors utilization.

关键词： image recognition robot-soccer debayering image segment recognition

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