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Biomedical engineering education and research in Hungary

Biomedical engineering education and research in Hungary

引用

8th International Symposium of Hungarian Researchers on Computational Intelligence and Informatics, CINTI 2007

作者： Benyó, Zoltán Department of Control Engineering and Information Technology Faculty of Electrical Engineering and Informatics Budapest University of Technology and Economics Magyar tudósok krt. 2 H-1117 Budapest Hungary

Biomedical engineering is a relatively new interdisciplinary science. This paper presents the biomedical engineering activity, which is carried out at Budapest University of technology and Economics and its partner institutes. In the first part the main goals and the curriculum of the Biomedical engineering Education Program (BMEEP) is presented. The second part of the paper summarizes the most important biomedical engineering researches carried out mostly in the Biomedical engineering Laboratory of our university.

关键词： Physiological models

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New special system of polynomial equations for 3-phase multilevel voltage converter derived from the PWM problem for 1-phase inverters 9

New special system of polynomial equations for 3-phase multi...

引用

2007 9th European control Conference, ECC 2007

作者： Kujan, Petr Sebek, Michael Hromcik, Martin Department of Control Engineering Faculty of Electrical Engineering Czech Technical University in Prague Prague Czech Republic Institute of Information Theory and Automation Czech Academy of Sciences Prague Czech Republic Centre for Applied Cybernetics Faculty of Electrical Engineering Czech Technical University in Prague Prague Czech Republic

ISBN: (纸本)9783952417386

This paper presents a new construction method of a new set of polynomial equations leading to the optimal solution of switching angles which minimize the total harmonic distortion (THD) of a three-phase multilevel converter. The number of equations obtained by this method is lower compared to previous methods. It is possible to solve the problem more simply. This method is based on analytical solution of the PWM problem in single-phase connection which is very fast and efficient and gives the conjunction between both problems. © 2007 EUCA.

关键词： Pulse width modulation

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Nonlinear adjustment with parameter estimation via computer algebra

Nonlinear adjustment with parameter estimation via computer ...

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8th International Symposium of Hungarian Researchers on Computational Intelligence and Informatics, CINTI 2007

作者： Paláncz, Béla Kovács, Levente Department of Photogrammetry and Geoinformatics Faculty of Civil Engineering Budapest University of Technology and Economics Muegyetem rkp. 3 H-1111 Budapest Hungary Department of Control Engineering and Information Technology Faculty of Electrical Engineering and Informatics Budapest University of Technology and Economics Magyar tudósok krt. 2 H-1117 Budapest Hungary

Computer algebra has been used to solve nonlinear adjustment accompanied by simultaneous parameter estimation. The corresponding constrained minimization can be achieved by Groebner bases with lexicographic monomial order on the domain of rational numbers, employing Groebner Walk, when Buchberger algorithm failed. This method providing infinite precision is about minimum ten times faster than the traditional iterative numerical techniques with finite precision. In addition, computer algebra solution doesn't need initial approximation as the iterative methods do. The suggested technique is illustrated by a numerical example of solving the problem of 2D Helmert transformation. For the numeric and symbolic computations the Mathematica 6.01 system was employed.

关键词： Parameter estimation

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Improvement of slip energy recovery drives with voltage source inverter for a speed control of wound rotor induction motors

Improvement of slip energy recovery drives with voltage sour...

引用

3rd IASTED Asian Conference on Power and Energy Systems, AsiaPES 2007

作者： Tunyasrirut, Satean Ngamwiwit, Jongkol Kinnares, Vijit Furuya, Tadayoshi Yamamoto, Yoshiichi Faculty of Engineering and Research Center for Communications and Information Technology King Mongkut's Institute of Technology Ladkrabang Bangkok 10520 Thailand Department of Electrical Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok 10520 Thailand Department of Electronics and Control Engineering Kitakyushu National College of Technology Kitakyushu Fukuoka Japan Department of Electronic Control Kumamoto National College of Technology 2659-2 Suya Nishigoshi-machi Kikuchi-Gun Kumamoto Prefecture 861-1102 Japan

ISBN: (纸本)9780889866577

This paper introduces the improvement of slip energy recovery drives with voltage source inverter for a speed control of wound rotor induction motors in order to reduce harmonics of input line current waveforms and improve its power factor. A boost chopper is used to connect the diode rectifier to DC link voltage, which is composed of a capacitor and voltage source inverter type space vector pulse width modulation (SVPWM). This scheme leads to be able to adjust the speed of the motor by the duty cycle of the chopper. The PI cascade controller is also introduced to control a speed to be constant when the load varies. An overview of the experimental test bench that the results are presented is three-fold. The first is the harmonics of input line current waveforms are reduced, the second power factor of the drive with VSI are improved and the third presented for a design PI controller for control a speed, where step change loading and unloading transients.

关键词： Speed

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Electric Power Quality in Isolated Systems - Requirements and Examples of Analysis

Electric Power Quality in Isolated Systems - Requirements an...

引用

Compatibility in Power Electronics (CPE)

作者： Daniel Czarkowski Janusz Mindykowski Marek Olesz Edward Szmit Mariusz Szweda Cork Institute of Technology Ireland Department of Marine Electrical Power Engineering Gdynia Maritime Academy Poland Faculty of Electrical and Control Engineering Gdansk University of Technology Poland Electrical and Automation Department PRS

The paper analyses power quality requirements for isolated systems. Standards used within this framework are taken from widely used classification societies rules, international standards applied to shore and off-shore units. The norms can be also divided into merchant and navy ships, both are analyzed. The requirements themselves are just a simple indication tool of the electric power quality. Hence, four real time examples are presented: 1) a navy ship with regular propeller, 2) an all electric ship with power network exceeded 1 MVA, 3) a passenger ship with 6.6 kV network and 4) equipment installed on shore, i.e. 120 kVA uninterruptible power supply system. For some of the presented examples standards are not fulfilled, which is discussed and some remarks are given.

关键词： Marine vehicles Electromagnetic compatibility Power quality Uninterruptible power systems Marine technology Power system measurements Voltage IEC standards Power system harmonics Frequency

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An Initial Rotor Position Estimation Method for Switched Reluctance Motor without Using Machine Parameter

An Initial Rotor Position Estimation Method for Switched Rel...

引用

International Conference on electrical Machines and Systems 2007(ICEMS2007)(第十届国际电机与系统会议)

作者： K. Tungpimolrut S. Kachapornkul P.Somsiri P. Jitkreeyarn Tadashi Fukao Akira Chiba Industrial Control and Automation Laboratory Section National Electronics and Computer Technology C Department of Electrical Engineering Faculty of Science and Technology Tokyo University of Science

In this paper a method to estimate the initial rotor position of the switched reluctance motor (SRM) at the stand still condition is proposed. The proposed method can be implemented by the simple microcontroller based system, and it is not necessary to know the magnetization curves. The impulse gate drive signal is applied and the winding current is detected and its approximate value is used for calculating the rotor position. The compensation method to reduce the estimation error thorough one cycle is also mentioned. The proposed method is implemented with the 6-stator-pole and 4- rotor-pole, 1.5 kW 3-phase switched reluctance motor.

关键词： Switched reluctance motor initial rotor position estimation

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Hybrid Model Predictive control Based on Wireless Sensor Feedback: An Experimental Study

Hybrid Model Predictive Control Based on Wireless Sensor Fee...

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Proceedings of the 46th IEEE Conference on Decision and control, Pages 5511-5970

作者： Alberto Bemporad Stefano Di Cairano Erik Henriksson Karl Henrik Johansson Department of Information Engineering Faculty of Engineering University of Sienna Siena Italy The Automatic Control Laboratory School of Electrical Engineering Royal Institute of Technology Stockholm Sweden

ISBN: (纸本)9781424414970;1424414970

This paper presents the design and the experimental validation of model predictive control (MPC) of a hybrid dynamical process based on measurements collected by a wireless sensor network. The proposed setup is the prototype of an industrial application in which a remote station controls the process via wireless network links. The experimental platform is a laboratory process consisting of four infrared lamps, controlled in pairs by two on/off switches, and of a transport belt, where moving parts equipped with wireless sensors are heated by the lamps. By approximating the stationary heat spatial distribution as a piecewise affine function of the position along the belt, the resulting plant model is a hybrid dynamical system. The control architecture is based on the reference governor approach: the process is actuated by a local controller, while a hybrid MPC algorithm running on a remote base station sends optimal belt velocity set-points and lamp on/off commands over a network link exploiting the information received through the wireless network. A discrete-time hybrid model of the process is used for the hybrid MPC algorithm and for the state estimator.

关键词： Hybrid modes Wireless networks network links Predictive control Maximum Allowable Concentration Model predictive control State estimation remote base station Model checking Infrared lamps Lamps directional function distant station local controller distributed model predictive control

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H∞ filtering for a class of 2D systems

H∞ filtering for a class of 2D systems

引用

15th European Signal Processing Conference, EUSIPCO 2007

作者： Wu, Ligang Lam, James Paszke, Wojciech Galkowski, Krzysztof Rogers, Eric Kummert, Anton Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin 150001 China Department of Mechanical Engineering University of Hong Kong Pokfulam Road Hong Kong Hong Kong Institute of Control and Computation Engineering University of Zielona Góra 65-246 Zielona Góra Poland Department of Electronics and Computer Science University of Southampton Southampton SO17 1BJ United Kingdom University of Wuppertal Faculty of Electrical Information and Media Engineering Communication Theory Germany

ISBN: (纸本)9788392134022

The unique characteristic of a repetitive process is a series of sweeps or passes through a set of dynamics defined over a finite duration known as the pass length. At the end of each pass, the process is reset and the next time through the output, or pass profile, produced on the previous pass acts as a forcing function on, an hence contributes to, the dynamics of the new pass profile. They are hence a class of systems with information propagation in two independent directions where here the dynamics over the finite pass length are described by a matrix linear differential equation and that from pass to pass has a discrete updating structure. This means that filtering/estimation theory/algorithms for, in particular, 2D discrete linear systems is not applicable. In this paper we solve a general filtering problem with a view toward use in the many applications where such action will be required. © 2007 EURASIP.

关键词： Dynamics

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Filtering of discrete linear repetitive processes with ∞ and 2-∞ performance

Filtering of discrete linear repetitive processes with ∞ an...

引用

2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007

作者： Ligang, Wu Lam, James Paszke, Wojciech Galkowski, Krzysztof Rogers, Eric Kummert, Anton Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin 150001 China Department of Mechanical Engineering University of Hong Kong Pokfulam Road Hong Kong Hong Kong Institute of Control and Computation Engineering University of Zielona Góra 65-246 Zielona Góra Poland School of Electronics and Computer Science University of Southampton Southampton SO17 IBJ United Kingdom University of Wuppertal Faculty of Electrical Information and Media Engineering Communication Theory

This paper considers the general filtering problem for a distinct class of two-dimensional (2-D) discrete linear systems, i.e. information propagation in two independent directions, known as discrete linear repetitive processes which are of both system-theoretic and applications interest. In particular, new results on the design of filters with guaranteed levels of performance are developed. These take the form of algorithms for the design of an ∞ and 2-∞ dynamic output feedback filter which guarantees that the resulting filtering error process is stable and has prescribed disturbance attenuation performance as measured by ∞ and 2- ∞ norms. © 2007 IEEE.

关键词： Signal filtering and prediction

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A Simplified Variable Speed Switched Reluctance Motor Drive without Using Encoder

A Simplified Variable Speed Switched Reluctance Motor Drive ...

引用

International Conference on electrical Machines and Systems 2007(ICEMS2007)(第十届国际电机与系统会议)

作者： P. Jitkreeyarn K. Tungpimolrut P. Somsiri S. Kachapornkul Akira Chiba Norimasa Tanabe Tadashi Fukao Industrial Control and Automation Laboratory National Electronics and Computer Technology Center Department of Electrical Engineering Faculty of Science and Technology Tokyo University of Science

The switched reluctance motor (SRM) and drive system is a candidate in various applications including the home appliance. The simple and low cost system with an adequate performance is also one topic to be developed. A speed sensor directly increases the cost and it directly influences the reliability of the system. This paper proposes a simplified variable speed control system for the SRM without using an encoder. The method is not based on the exact rotor position estimation, only the turn off angle is determined from the simple relation between measured terminal voltage and current. The effectiveness of the proposed method is verified by the experimental result on the 3 kW 3-phase 6-stator-pole and 4-rotor-pole SRM.

关键词： Switched reluctance motor variable speed drive system turn off angle rotor position estimation

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