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International Conference on Harmonics and Quality of Power

作者： Krzysztof Górecki Faculty of Electrical Engineering Automatic Control and Informatics Opole University of Technology Opole Poland

This paper presents possible use of floating-point signal processor for the purpose of measuring harmonics and interharmonics and for detection of transient events in real-time. WPT and its characteristics to decompose signal into components were applied as calculation method. Also various wavelet-based and IIR filters were analysed. The main reason for that was to check the time used for the decomposition process in accordance with the WPT tree for 5 decomposition levels of the measurement window according to the quality standards of electricity.

关键词： Power harmonic filters IIR filters Finite impulse response filters Power measurement Harmonic analysis Power quality Transforms

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An artificial vision solution for reusing discarded parts resulted after a manufacturing process

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IOP Conference Series: Materials Science and Engineering 2016年第2期145卷

作者： V Cohal A Cohal Tehnical University 'Gh. Asachi' of Iaşi - Romania Faculty of Machine Manufacturing and Industrial Management Department of Machine Manufacturing Technology Blvd. Mangeron No. 59A 700050 Iasi Romania Tehnical University 'Gh. Asachi' of Iaşi - Romania Faculty of Automatic Control and Computer Engineering Department of Automatic Control and Applied Informatics Blvd. Mangeron No. 27 700050 Iasi Romania

The profit of a factory can be improved by reusing the discarded components produced. This paper is based on the case of a manufacturing process where rectangular metallic sheets of different sizes are produced. Using an artificial vision system, the shapes and the sizes of the produced parts can be determined. Those sheets which do not respect the requirements imposed are labeled as discarded. Instead of throwing these parts, a decision algorithm can analyze if another metallic sheet with smaller dimensions can be obtained from these. Two methods of decision are presented in this paper, considering the restriction that the sides of the new sheet has to be parallel with the axis of the coordinate system. The coordinates of each new part obtained from a discarded sheet are computed in order to be delivered to a milling machine. Details about implementing these algorithms (image processing and decision respectively) in the MATLAB environment using Image Processing Toolbox are given.

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Development of multi-null-hypotheses method for detection of selective forces at molecular level in evolution of human genes involved in DNA-repair mechanism impaired in cancer progression 19

Development of multi-null-hypotheses method for detection of...

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19th IFAC World Congress on International Federation of automatic control, IFAC 2014

作者： Cyran, Krzysztof A. Kimmel, Marek Institute of Informatics Silesian University of Technology Gliwice Poland Institute of Automatic Control Silesian University of Technology Gliwice Poland

ISBN: (纸本)9783902823625

We developed a multi-null-hypotheses (MNH) method for testing signatures of natural selection in Kimura's neutral model of human evolution with population growth and limited migration between dems. To evaluate the influence of such time changes and demography in population size, we employed different variants of the null hypothesis, corresponding to constancy, growth, or substructure and growth, respectively. We apply the model for searching in SNP haplotypes from four genes implicated in impairing DNA-repair mechanism in human familial cancers: ataxia telangiectasia (ATM), human helicase RECQL, Bloom's syndrome (BLM) and Werner's syndrome (WRN). The sample is composed of about 600 chromosomes, derived from residents of Houston, TX (USA), representing major ethnic backgrounds: Caucasian, African, Asian and Hispanic. The method is illustrated with Bloom's neutrality tests B and Q. Our study suggests that detected deviations from neutrality may be obscured by presence of recombination, substructure and changes of population size in the case of RECQL haplotypes, while in the ATM haplotypes the signal is rather strong. The BLM and especially WRN haplotypes do not register deviations from neutrality. © IFAC.

关键词： Population statistics

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Self-triggered Nonlinear Model Predictive control for Networked control Systems

Self-triggered Nonlinear Model Predictive Control for Networ...

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American control Conference

作者： Kazumune Hashimoto Shuichi Adachi Dimos V. Dimarogonas Automatic Control Laboratory Department of Electrical Engineering KTH Institute of Technology 10044 Stockholm Sweden Department of Applied Physics and Physico-Informatics Keio University Yokohama Japan ACCESS Linnaeus Center School of Electrical Engineering KTH Royal Institute of Technology 10044 Stockholm Sweden

ISBN: (纸本)9781479917730

In this paper, we propose a self-triggered formulation of Model Predictive control for continuous-time nonlinear networked control systems. Our control method derives not only when to execute control tasks but also provides the way to discretize the optimal control trajectory so as to alleviate the communication burden as much as possible. Stability analysis under the sample-and-hold implementation is also given in detail, which guarantees that the state converges to a terminal region where the local linear state feedback can stabilize the system. A simulation example verifies our proposed framework.

关键词： Networked control systems nonlinear model predictive control control systems control task State feedback Stability analysis control Methods control trajectory sample-and-hold

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Fast and scalable constrained reference tracking for discrete-time linear systems

Fast and scalable constrained reference tracking for discret...

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European control Conference

作者： Sabin - Constantin Carpiuc Mircea Lazar Veaceslav Spinu Department of Automatic Control and Applied Informatics Technical University "Gheorghe Asachi" of Iasi Department of Electrical Engineering Eindhoven University of Technology

ISBN: (纸本)9781467371605

This paper considers the synthesis of tracking control laws for discrete-time linear systems. A two-step approach that results in a sequence of quadratic contractive sets is proposed. Firstly, the quadratic sets are obtained by maximizing the size of the sets. Then, secondly, a conic partition is employed to construct continuous conewise linear control laws for each quadratic set while optimizing performance. Furthermore, a set-theoretic method is employed to extend the stabilizing law for the tracking control problem. As a result it yields scalable off-line computation of the control law. Moreover, this approach provides stability guarantees and constraints satisfaction. The effectiveness of the approach is demonstrated using an illustrative example.

关键词： control law Scalability tracking control constraint satisfaction problems line computation Fasting Linear system discrete-time Quadratic discrete time systems SETTING off-line computation

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Adaptive filtering approach to dynamic weighing: A checkweigher case study 19

Adaptive filtering approach to dynamic weighing: A checkweig...

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19th IFAC World Congress on International Federation of automatic control, IFAC 2014

作者： Meller, Michal Niedźwiecki, Maciej Pietrzak, Przemyslaw Faculty of Electronics Telecommunications and Informatics Department of Automatic Control Gdańsk University of Technology Narutowicza 11/12 Gdańsk80-233 Poland Department of Control and Measurement West Pomeranian University of Technology Sikorskiego 37 Szczecin70-313 Poland

ISBN: (纸本)9783902823625

Dynamic weighing, i.e., weighing of objects in motion, without stopping them on the weighing platform, allows one to increase the rate of operation of automatic weighing systems used in industrial production processes without compromising their accuracy. The paper extends and compares two approaches to dynamic weighing, based on system identification and variable-bandwidth filtering, respectively. Experiments, carried on a conveyor belt type checkweigher, show that when appropriately tuned, both approaches yield satisfactory results that meet stringent metrological accuracy specifications. © IFAC.

关键词： Adaptive filters

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Reiteration of Hankel singular value decomposition for modeling of complex-valued signal

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AIP Conference Proceedings 2016年第1期1738卷

作者： Michał Staniszewski Agnieszka Skorupa Łukasz Boguszewicz Magdalena Wicher Marek Konopka Maria Sokół Andrzej Polański aSilesian University of Technology Faculty of Automatic Control Electronics and Computer Science Institute of Informatics Akademicka 16 Gliwice Poland bMaria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology Gliwice Branch Department of Medical Physics ul. Wybrzeze Armii Krajowej Gliwice Poland cScanx Medical Imaging Sp. z o.o. ul. PCK 10 Katowice Poland

Modeling signal which forms complex values is a common scientific problem, which is present in many applications, i.e. in medical signals, computer graphics and vision. One of the possible solution is utilization of Hankel Singular Value Decomposition. In the first step complex-valued signal is arranged in a special form called Hankel matrix, which is in the next step decomposed in operation of Singular Value Decomposition. Obtained matrices can be then reformulated in order to get parameters describing system. Basic method can be applied for fitting whole signal but it fails in modeling each particular component of signal. Modification of basic HSVD method, which relies on reiteration and is used for main components, and application of prior knowledge solves presented problem.

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Innovative approach in analysis of EEG and EMG signals — Comparision of the two novel methods

Innovative approach in analysis of EEG and EMG signals — Co...

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International Conference on Methods and Models in Automation and Robotics (MMAR)

作者： Aleksandra Kawala-Janik Michal Podpora Jerzy Baranowski Waldemar Bauer Mariusz Pelc Faculty of Electrical Engineering Automatic Control and Informatics Opole University of Technology Opole Poland Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering AGH University of Science and Technology Krakow Poland Old Royal Naval College University of Greenwich London U.K.

In this paper comparison of the two innovative signal processing methods for analysis of both EEG and EMG biomedical signals is in short presented. The reason for that is caused by the fact, that nowadays the broad analysis of various biomedical signals is extremely popular. The first method presented in this paper relies on kernel density estimators application. Implementation of such method enables construction of densitograms for the examined bio-signals. One of the biggest advantages of this method is that it allows to obtain statistically filtered signals, which results in making the whole signal processing task significantly quicker. The second method described in this paper is based on basic mathematical operations only. Despite its simplicity the whole process can be implemented on almost any hardware platform, including those with very limited computational capabilities. Also it makes the task quick. In accordance with the conducted experiments - the method is also efficient and as it can also be implemented on embedded platform and the algorithm can be rewritten in any programming language, the potential application of this method is wide.

关键词： Electroencephalography Electromyography Electrodes Signal processing Educational institutions Headphones Hardware

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Development of Multi-Null-Hypotheses Method for Detection of Selective Forces at Molecular Level in Evolution of Human Genes involved in DNA-Repair Mechanism Impaired in Cancer Progression

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IFAC Proceedings Volumes 2014年第3期47卷 11547-11552页

作者： Krzysztof A. Cyran Marek Kimmel Institute of Informatics Silesian University of Technology Gliwice Poland (Tel: +48-32-2372500 Institute of Automatic Control Silesian University of Technology Gliwice Poland (Tel. +48-32-2371051

关键词： Bioinformatics modeling and identification data mining tools cancer genes evolution searching natural selection DNA-repair mechanism in cancer progression

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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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