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    Wyświetlanie 1-7 z 7
    Tytuł:
    Gas turbine fault diagnostic system based on fuzzy logic
    System diagnostyki awarii turbiny gazowej oparty na logice rozmytej
    Autorzy:
    Shuvatov, T.
    Suleimenov, B.
    Komada, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/407986.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    turbina gazowa
    logika rozmyta
    diagnostyka
    gas turbine
    fuzzy logic
    diagnostic
    Opis:
    In the article a method of parametric diagnostics of a gas turbine, based on fuzzy logic is proposed. The diagnostic map of interconnection between some parts of turbine and changes of corresponding parameters has been developed. Also we have created model to define the efficiency of the compressor using fuzzy logic algorithms.
    W artykule zaproponowano metodę parametrycznej diagnostyki turbiny gazowej w oparciu o logikę rozmytą. Opracowana została diagnostyczna mapa połączeń między niektórymi zespołami turbiny gazowej oraz zmianami odpowiednich parametrów. Ponadto udało nam się stworzyć model do określania wydajności sprężarki przy użyciu algorytmów logiki rozmytej.
    Źródło:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2012, 3; 40-42
    2083-0157
    2391-6761
    Pojawia się w:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control system elaboration for phosphorite charge pelletizing process
    Projektowanie systemu sterowania procesem paletyzacji fosforytów
    Autorzy:
    Mukhanov, B.
    Suleimenov, A.
    Komada, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/408000.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    proces granulacji
    sterowanie optymalne
    logika rozmyta
    pelletizing process
    optimal control
    fuzzy logic
    Opis:
    Regular granulation of fine materials requires appropriate density and humidity fluctuations. The control system of pelletizing process that assures optimal modes was proposed. The combined control algorithm was realized with fuzzy model based disturbance-stimulated control at the upper level, and the deviation control at the lower level.
    Regularna granulacja drobnych materiałów wymaga odpowiedniej gęstości i wilgotności. W artykule zaproponowano system sterowania procesem peltyzacji, zapewniający optymalne tryby pracy. Złożony agorytm sterowania został zrealizowany z uwzględnieniem modelu rozmytego w ramach sterowania stymulowanych zaburzeń na górnym poziomie, natomiast na niższym poziomie (wykonawczym) funkcjonują układy automatycznej regulacji.
    Źródło:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2012, 3; 25-27
    2083-0157
    2391-6761
    Pojawia się w:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza widm emisyjnych procesów spalania jako zagadnienie odwrotne w pomiarach pośrednich
    Flame emission spectrum analysis as an inverse problem in indirect measurements
    Autorzy:
    Wójcik, W.
    Cięszczyk, S.
    Kisała, P.
    Komada, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/151671.pdf
    Data publikacji:
    2009
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    pomiary pośrednie
    zagadnienie odwrotne
    OP-FTIR
    procesy spalania
    indirect measurements
    inverse problem
    combustion processes
    Opis:
    Artykuł przedstawia problem pomiarów in situ zawartości gazów oraz temperatury w procesach spalania. Pomiary takie przeprowadzone być mogą z wykorzystaniem spektrometru FTIR o otwartej ścieżce pomiarowej. Analizę widm transmisyjnych oraz emisyjnych procesów o zmieniającej się temperaturze potraktować można jako rozwiązanie zagadnienia odwrotnego. Zagadnienie proste jest wtedy modelowaniem widm w zależności od temperatury oraz zawartości składników. Przedstawiono pomiary promieniowania procesu spalania oraz ich analizę ilościową z wykorzystaniem opisanej metody.
    The paper presents a problem of in-situ measurements of gas concentration and temperature of combustion processes. Such measurements can be carried out by using an open path FTIR. The analysis of transmission and emission spectra of changeable temperature processes can be treated as an inverse problem. Modelling of the spectrum as a function of temperature and species concentration is then a direct problem. In this paper there are presented combustion process measurements and the quantitative analysis as an inverse problem is performed. In the introduction the need for investigations of the combustion process is discussed. Recently biomass gasification and combustion have been playing a significant role due to the environmental protection. What is important, the process should be analysed by an in-situ method. The access to some processes can be so difficult that only remote measurements are possible. In those cases an OP-FTIR spectrometer (Open Path Fourier Transform Infrared Spectrometer) can be used. The analysis of the classical FTIR spectrum is shown in Section 2. This method consists in using a set of calibration samples for preparing the calibration curve. Unknown concentration of species is determined with this curve. Calibration and measurements have to be carried out in the same temperature. Section 3 describes the problem of simultaneous analysis of concentration and temperature of gases based on infrared spectrum measurements. The inverse problem method is one of the solutions of this problem. The direct problem consists in modeling the spectrum modeling of known temperature and concentration. There are two kinds of methods for modeling the synthetic spectrum of gases - physical (line by line) and statistical one. The spectra in Fig. 3 are calculated for the temperature profiles of Fig. 2. The misfit minimisation between the synthetic and measurement spectrum by means of an optimization method is called the inverse problem. Section 4 describes the measurements of the process infrared spectrum. The spectrum measurements based on the spectral gas models and the inverse problem are analysed. The FTIR spectra measured are shown in Figs. 7 and 9, whereas the adequate analyses are depicted in Figs. 6 and 8. The paper is summarised with some conclusions.
    Źródło:
    Pomiary Automatyka Kontrola; 2009, R. 55, nr 2, 2; 121-125
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optyczna metoda diagnostyki gazu syntezowego z biomasy
    Optical Method for Biomass Syngas Monitoring
    Autorzy:
    Komada, P.
    Cięszczyk, S.
    Zhirnova, O.
    Askarova, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818001.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    spektroskopia
    gaz syntezowy
    diagnostyka
    spectroscopy
    synthesis gas
    diagnostics
    Opis:
    One of the methods of increasing the overall biomass share in the electricity and heat production is its gasification and subsequent co-combustion of the obtained syngas in conventional power boilers. The process of biomass gasification is relatively well controlled and understood. It does not change the fact that the syngas composition depends on many process factors, as well as the composition of the charge batch. Unfortunately, it means that the obtained product is not homogeneous in time. Consequently, the use of such fuel for electricity production may present a number of problems from the control point of view. Therefore, both during the syngas production and the co-firing process, it is advisable to use information on the composition of produced syngas, or at least its main components. It is possible to use optical methods, which are an interesting alternative to classical methods, even despite unfavorable measurement conditions. The article presents selected optical method for the synthesis gas monitoring. The results of simulation studies are presented, confirming the possibility of determining the concentration of interesting components in the syngas mixture.
    Źródło:
    Rocznik Ochrona Środowiska; 2016, Tom 18, cz. 2; 271-283
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metoda analizy widm mierzonych z wykorzystaniem spektrometrów OP-FTIR w monitorowaniu powietrza atmosferycznego oraz gazów w procesach przemysłowych
    Open Path FT-IR Spectra Analysis Method for Monitoring of Environment and Processes with Varying Conditions
    Autorzy:
    Cięszczyk, S.
    Komada, P.
    Akhmetova, A.
    Mussabekova, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1817978.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    otwarta ścieżka
    FTIR
    analiza widm
    wpływ temperatury
    open path
    spectrum analysis
    temperature influence
    Opis:
    Open-Path Fourier Transform Infrared (OP-FTIR) can be used for monitoring of atmospheric environment. The open path technique is based on the measurement of the absorption along the atmosphere path between radiation source and spectrometer. Measurement paths used in this method have a considerable length – from tens of meters to several kilometers. The main advantage of OP-FTIR spectrometry is the possibility of continuously and simultaneously measuring concentrations of multiple compounds. Unfortunately, quantitative analysis of the spectra of such measurements is a difficult issue due to the changing atmospheric conditions and overlapping of the absorption spectra of various components. Numerous algorithms used for the interpretation of the measured spectra have been proposed. They can be classified into methods using classical chemometric calibration and iterative algorithms. Classical Least Square CLS and Partial Least Square PLS are the most commonly used methods of OP-FTIR spectrometry. Iterative methods are based on comparing measured data with synthetic spectra, that is computational models of investigated optical path transmission. For this purpose, databases such as HITRAN are used. Transmission model must take into account not only the spectral characteristics of gases, but also the measuring instrument influence on the measured spectrum. As an example of modeling the spectra of NH3 and HCl gas are used. Modeling of gas spectra with different resolution is shown. Classical methods of building a chemometric calibration model require appropriate reference samples. This is usually associated with considerable cost and time-consuming calibration process. In addition, correct calibration requires maintaining the same conditions during the calibration, as in practical measurements. This is possible only in the case of laboratory measurements. In particular, it is necessary to maintain a constant temperature and pressure of examined substances. It is connected with changes in width and intensity of gas rotational lines. In classical spectroscopy, changing environmental conditions require new calibration measurements. In the open path spectroscopy, changes in conditions occur naturally along with the changes in the examined environment (object, process). If the measurement conditions in the environment differ from those in calibration measurements, significant errors in determining the content of the ingredients may appear. Greater changes in conditions may occur in a variety of chemical or physical processes. Sometimes it is not possible to perform measurements in conditions similar to those occurring in a particular industrial facility. In such cases, synthetic spectra may be used in two ways: in an iterative process to compare with measured spectra or to form a chemometric calibration models. In the latter case, the problem of changing conditions can be solved in several ways. The simplest method is to build separate calibration models for all conditions that can occur during the measurement. However, in order to use this method, it is necessary to measure the existing conditions and choose an appropriate local model. Another method is to correct the measured spectra and to adapt them to the standard conditions. The third option is to build global models. The spectra of all the conditions that may occur during the measurement are then used for building a calibration model. Then, the effect of temperature on the determination of gas content for local calibration models is investigated. Finally, a global calibration model insensitive to temperature changes in 10-40°C range is built.
    Źródło:
    Rocznik Ochrona Środowiska; 2016, Tom 18, cz. 2; 218-234
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Method and means of measuring small quantities of electrical resistance
    Metoda i sposób pomiaru małych wartości rezystancji elektrycznej
    Autorzy:
    Pukach, A.
    Teslyuk, V.
    Ivantsiv, R.A.
    Komada, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/408106.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    MEMS
    rezystancja elektryczna
    mostek elektryczny
    electric resistance
    electric bridge circuit
    Opis:
    The paper presents the results of developing simulation of a system for measuring small quantities of electrical resistance using technology of microelectromechanical systems (MEMS). It also offers the analysis and evaluation of the results. The authors established the dependence of residual voltage (as the output parameter of measuring system) on controlled resistance (as input parameter of measuring system core) during the process of balancing the electric bridge circuit.
    Artykuł przedstawia wyniki symulacji opracowanego systemu do pomiaru małych wartości rezystancji elektrycznej wykorzystującego układy MEMS. Przedstawiono takie analizy oraz ocenę wyników. Opisano zależność napięcia szczątkowego (jako parametr wyjściowy systemu pomiarowego) od rezystancji mierzonej (jako parametr wejściowy systemu pomiarowego) podczas procesu równoważenia mostka.
    Źródło:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2012, 4b; 14-16
    2083-0157
    2391-6761
    Pojawia się w:
    Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficiency Evaluation Method for the Devices with Infrasound Impact on Functioning of Computer Equipment
    Autorzy:
    Korchenko, A.
    Tereykovsky, I.
    Aytkhozhaevа, E.
    Seilova, N.
    Kosyuk, Y.
    Wójcik, W.
    Komada, P.
    Sikora, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/963897.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    information security
    computer hardware protection
    infrasound
    infrasound damage
    efficiency evaluation method
    Opis:
    A significant threat to critical infrastructure of computer systems has a destructive impact caused by infrasound waves. It is shown that the known infrasound generations are based on using the following devices: a Helmholtz Resonator, Generation by using a Pulsating Sphere such as Monopolies, Rotor-type Radiator, Resonating Cylinder, VLF Speaker, Method of Paired Ultrasound Radiator, and airscrew. Research of these devices was made in this paper by revealing their characteristics, main advantages and disadvantages. A directional pattern of infrasound radiation and a graph of dependence of infrasound radiation from the consumed power was constructed. Also, during the analysis of these devices, there was proven a set of basic parameters, the values of which make it possible to characterize their structural and operational characteristics. Then approximate values of the proposed parameters of each those considered devices, were calculated. A new method was developed for evaluating the effectiveness of infrasound generation devices based on the definition of the integral efficiency index, which is calculated using the designed parameters. An example of practical application of the derived method, was shown. The use of the method makes it possible, taking into account the conditions and requirements of the infrasound generation devices construction, to choose from them the most efficient one.
    Źródło:
    International Journal of Electronics and Telecommunications; 2018, 64, 2; 189-196
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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