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Tytuł:
Influence of control parameters on synchronization stability of virtual synchronous generator
Autorzy:
Zhang, Yanxia
Cheng, Yachao
Liu, Kaixiang
Han, Yue
Powiązania:
https://bibliotekanauki.pl/articles/2172794.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
control parameter
frequency modulation coefficient
phase plane method
synchronization stability
virtual synchronous generator
Opis:
Different from the synchronization mechanism of synchronous generators, the non-synchronous generators must be synchronized with the grid through a controller. Generally, the virtual synchronous generator (VSG) control strategy is adopted for this purpose. In view of the current situation, where the control loops are not comprehensively considered in the research of the synchronization stability of the VSG, this paper considers multiple control loops, such as active frequency loops, virtual governors, power filters and current constraint control, to establish the mathematical model of the VSG and infinite system. On this basis, the correlation formula between power angle difference and control parameters is deduced. Adopting the phase plane method, the influence of different control loops and their parameters on the transient synchronization stability is analyzed. Finally, a setting principle of the frequency modulation coefficient of virtual governors is proposed, which not only meets the response speed of control systems, but also has good control performance.
Źródło:
Archives of Electrical Engineering; 2022, 71, 4; 811--828
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inter-harmonic parameter identification method based on transform with local maximum spectrum
Autorzy:
Sun, Lin
Song, Jing
Jin, Yan
Powiązania:
https://bibliotekanauki.pl/articles/2042793.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
inter-harmonic
parameter identification
power system
synchrosqueezed transform
time-frequency analysis
Opis:
In order to improve the detection accuracy of harmonics/inter-harmonics in power systems, a new method of harmonic/inter-harmonic detection based on synchrosqueezed transform and the Hilbert operator based on local spectrum maximum is proposed. Firstly, the spectrum of inter-harmonic signals is obtained through short-time Fourier transform, and the local maximum value of the spectrum in the frequency direction is detected. Then, based on the maximum frequency of the spectrum, a new frequency redistribution operator and synchronous extraction operator are constructed. It combines the operators with ridge detection for the decomposition of harmonic/inter-harmonic signals, so as to obtain a series of intrinsic mode function (IMF) components. Finally, the instantaneous amplitude and frequency of the IMF components is obtained by using the Hilbert operator. Meanwhile, according to the instantaneous frequency mutation point in the spectrum, the starting and ending time of transient harmonics/inter-harmonics is located accurately. Based on a low signal-to-noise ratio (SNR), the wavelet packet method (WP), Hilbert Marginal Spectrum method (HMS), synchrosqueezing wavelet transform method (SST), the Hybrid SST method (HSST), enhanced empirical wavelet transform (EEWT) and the proposed method are used to identify the harmonic/inter-harmonic parameters, respectively. The experimental results show that the proposed LMSST method can effectively separate the steady-state and transient harmonic/inter-harmonic signals, and has higher detection accuracy and better noise robustness.
Źródło:
Archives of Electrical Engineering; 2022, 71, 1; 189-209
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modal characterization of sandwich skew plates
Autorzy:
Pavan-Kumar, Dhotre
Srinivasa, Chikkol V.
Powiązania:
https://bibliotekanauki.pl/articles/2114835.pdf
Data publikacji:
2021
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
natural frequency
non-dimensional frequency parameter
antisymmetric laminate
fiber orientation angle
skew angle
Opis:
The current work focuses on the experimental and finite element free vibration studies of laminated composite sandwich skew plates. The comparison was made between the experimental values obtained by the Fast Fourier transform (FFT) analyzer and a finite el-ement solution obtained from CQUAD8 finite element of The MacNeal-Schwendler Corporation (MSC) / NASA STRucture Analysis (NAS-TRAN) software. The influence of parameters such as aspect ratio (AR) (a/b), skew angle (α), edge condition, laminate stacking sequence, and fiber orientation angle (θ°) on the natural frequencies of sandwich skew plates was studied. The values obtained by both the finite el-ement and experiment approaches are in good agreement. The natural frequencies increase with an increase in the skew angle for all giv-en ARs.
Źródło:
Acta Mechanica et Automatica; 2021, 15, 3; 143--153
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the characteristics of Klein–Cook parameter and diffraction efficiency of acousto-optic interaction for low-frequency ultrasonic in the liquid
Autorzy:
Gao, Jing
Han, Guang
Zhu, Jianzhuo
Powiązania:
https://bibliotekanauki.pl/articles/2033941.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
acousto-optic interaction
Klein-Cook parameter
Raman-Nath diffraction
diffraction efficiency
Opis:
We have investigated the characteristics of acousto-optic interaction for low-frequency ultrasonic wave in a liquid. Based on the coupling wave equation of acousto-optic interaction, the diffraction light characteristics for normal incidence at small parameter Q have been discussed. The parameter Q with respect to acousto-optic interaction length, ultrasonic frequency, water temperature, and the concentration of sucrose solution have been analyzed, which is an important physical quantity and reflects the degree of mismatch in the acousto-optic interaction. The diffraction efficiencies for different parameters Q, incident angles and phase shifts have been calculated. The results of our work provide theoretical basis for further study of the acousto-optic effect in the liquid.
Źródło:
Optica Applicata; 2021, 51, 3; 445-456
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new method to reduce electromagnetic interference using signal modeling
Autorzy:
Daneshvar, Milad
Parhizgar, Nasser
Oraizi, Homayoon
Powiązania:
https://bibliotekanauki.pl/articles/949874.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electromagnetic radiation
frequency response
interference
multi-component
signals
parameter modeling
transmission lines
Opis:
Controlling and reducing the radiation emitted by various systems helps the board designer improve systems’ performance. One proposed way to achieve these goals is to use an algorithm to control the radiation applied to systems. According to the executive structure of the algorithm and considering the nature of the existing signals in several components, the separation of the signal components is on the agenda of the algorithm. In fact, the goal is to create an intuitive view of the multi-component signals around the systems that enter the systems from different angles and have a detrimental effect on their performance. Using signal processing methods, we will be able to break down the signal into different components and simulate each component separately. To prevent high computational repetitions and increase simulation time in signal component analysis, by reducing the components, we reduce the number of mesh cells in the software and, using linear approximation, determine the exact position of the radiation signal applied to systems and thus the best linear relationship. The signal entry path is used to apply the rules required for prediction design.
Źródło:
Archives of Electrical Engineering; 2020, 69, 4; 829-840
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of temperature variation on vibration of rectangular plate of visco-elastic material
Autorzy:
Khanna, Anupam
Singhal, Ashish
Powiązania:
https://bibliotekanauki.pl/articles/1030670.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
clamped
frequency parameter
taper parameters
visco-elastic
Opis:
This paper deals with free vibration modes and natural frequencies of a thin visco-elastic, non-homogeneous rectangular plate with clamped ends. First two modes of frequency parameter of vibration are derived on the basis of Rayleigh-Ritz technique. Since the effect of temperature decreases the efficiency and durability of the structure, influence of bi-parabolic temperature variations on vibration of rectangular plate is analyzed. Tapering in rectangular plate is assumed bi-exponentially in x-and y-direction. Effect of non-homogeneity is discussed with exponential variation in density of the plate’s material i.e. visco-elastic material “Duralium” which is an alloy of aluminum. Vibration modes of clamped plate are calculated for various values of thermal gradient, taper parameters and non-homogeneity constant. Results are explained with the help of the graphs.
Źródło:
World Scientific News; 2020, 139, 2; 61-75
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel method for separability of signal components to estimate radiation from a high-frequency subsystem
Autorzy:
Daneshvar, Milad
Parhizgar, Naser
Oraizi, Homayoon
Powiązania:
https://bibliotekanauki.pl/articles/140523.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electromagnetic interference
electromagnetic radiation
parameter estimation
multi-component signals
frequency response
radio frequency
Opis:
Specific requirements are designed and implemented in electronic and telecommunication systems for received signals, especially high-frequency ones, to examine and control the signal radiation. However, as a serious drawback, no special requirements are considered for the transmitted signals from a subsystem. Different industries have always been struggling with electromagnetic interferences affecting their electronic and telecommunication systems and imposing significant costs. It is thus necessary to specifically investigate this problem as every device is continuously exposed to interferences. Signal processing allows for the decomposition of a signal to its different components to simulate each component. Radiation control has its specific complexities in systems, requiring necessary measures from the very beginning of the design. This study attempted to determine the highest radiation from a subsystem by estimating the radiation fields. The study goal was to investigate the level of radiations received and transmitted from the adjacent systems, respectively, and present methods for control and eliminate the existing radiations. The proposed approach employs an algorithm which is based on multi-component signals, defect, and the radiation shield used in the subsystem. The algorithm flowchart focuses on the separation and of signal components and electromagnetic interference reduction. In this algorithm, the detection process is carried out at the bounds of each component, after which the separation process is performed in the vicinity of the different bounds. The proposed method works based on the Fourier transform of impulse functions for signal components decomposition that was employed to develop an algorithm for separation of the components of the signals input to the subsystem.
Źródło:
Archives of Electrical Engineering; 2019, 68, 3; 497-510
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An identification procedure of electromagnetic parameters for an induction motor equivalent circuit including rotor deep bar effect
Autorzy:
Rolek, J.
Utrata, G.
Powiązania:
https://bibliotekanauki.pl/articles/141612.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
induction motors
equivalent circuits
parameter identification
frequency-domain analysis
genetic algorithms
Opis:
The paper presents an identification procedure of electromagnetic parameters for an induction motor equivalent circuit including rotor deep bar effect. The presented procedure employs information obtained from measurement realised under the load curve test, described in the standard PN-EN 60034-28: 2013. In the article, the selected impedance frequency characteristics of the tested induction machines derived from measurement have been compared with the corresponding characteristics calculated with the use of the adopted equivalent circuit with electromagnetic parameters determined according to the presented procedure. Furthermore, the characteristics computed on the basis of the classical machine T-type equivalent circuit, whose electromagnetic parameters had been identified in line with the chosen methodologies reported in the standards PN-EN 60034-28: 2013 and IEEE Std 112TM-2004, have been included in the comparative analysis as well. Additional verification of correctness of identified electromagnetic parameters has been realised through comparison of the steady-state power factor-slip and torque-slip characteristics determined experimentally and through the machine operation simulations carried out with the use of the considered equivalent circuits. The studies concerning induction motors with two types of rotor construction – a conventional single cage rotor and a solid rotor manufactured from magnetic material – have been presented in the paper.
Źródło:
Archives of Electrical Engineering; 2018, 67, 2; 279--291
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Free Vibration Analysis of Mindlin Plates Resting on Pasternak Foundation Using Coupled Displacement Method
Autorzy:
Rajesh, K.
Saheb, K. M.
Powiązania:
https://bibliotekanauki.pl/articles/139827.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fundamental frequency parameter
Mindlin plate
linear free vibrations
computational fluid dynamics
CFD
Pasternak foundation
parametr częstotliwości podstawowej
płyta Mindlina
liniowe drgania swobodne
obliczeniowa mechanika płynów
podłoże Pasternaka
Opis:
The authors developed a simple and efficient method, called the Coupled Displacement method, to study the linear free vibration behavior of the moderately thick rectangular plates in which a single-term trigonometric/algebraic admissible displacement, such as total rotations, are assumed for one of the variables (in both X,Y directions), and the other displacement field, such as transverse displacement, is derived by making use of the coupling equations. The coupled displacement method makes the energy formulation to contain half the number of unknown independent coefficients in the case of a moderately thick plate, contrary to the conventional Rayleigh-Ritz method. The smaller number of undetermined coefficients significantly simplifies the vibration problem. The closed form expression in the form of fundamental frequency parameter is derived for all edges of simply supported moderately thick rectangular plate resting on Pasternak foundation. The results obtained by the present coupled displacement method are compared with existing open literature values wherever possible for various plate boundary conditions such as all edges simply supported, clamped and two opposite edges simply supported and clamped and the agreement found is good.
Źródło:
Archive of Mechanical Engineering; 2018, LXV, 1; 107-128
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uogólniony model matematyczny przetworników jednoczesnych zmian dwóch parametrów dwójników RC / GC o wyjściu częstotliwościowym
Generalized model of simultaneous two parameter changes of two-port RC / GC network converter with frequency output
Autorzy:
Topór-Kamiński, L.
Guzik, J.
Pilśniak, A.
Powiązania:
https://bibliotekanauki.pl/articles/267861.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
dwójnik typu RC/GC
przetwornik zmian parametrów impedancji
częstotliwość
oscylator kwadraturowy rzędu trzeciego
transkonduktancyjny wzmacniacz operacyjny
OTA
impedance component changes-to-frequency converter
quadrature oscillator
transconductance amplifier
Opis:
W pracy przedstawiono uogólniony model matematyczny nowej klasy przetworników parametrów {(R;C), (C; tgδ=ωRC), (G;C); (C; tgδ=G/ωC)} (dwójników RC postaci Z = R+1/jωC lub dwójników GC postaci Y = G+jωC) , pozwalających w oparciu o układ oscylatora kwadraturowego rzędu trzeciego (por. rysunek 1a,b) na jednoczesny pomiar tych dwóch parametrów, przy czym zmianom jednego z parametrów (C) odpowiadają zmiany wartości pulsacji ω sygnału wyjściowego przetwornika, natomiast zmianom wartości drugiego z parametrów (R, G, tgδ) – odpowiednio – wzrost lub spadek wartości amplitudy U1 i U2 generowanych sygnałów. Wskazano przy tym na optymalne układy analizowanej klasy przetworników.
In the paper the generalized model of simultaneous new two parameter {(R;C), (C; tgδ=ωRC), (G;C); (C; tgδ=G/ωC)} changes (of two-port RC given in form Z = R+1/jωC or GC network given in form Y = G+jωC) converter with frequency output is presented. The converter is based on third order quadrature oscillator (see Fig.1a,b) where one of the measuring two-port parameter (C) is converted into frequency ω , however second parameter changes (R, G, tgδ) – suitably converted – to the growth or the fall of amplitude value U1 or U2 of generated signals. The advantages of proposed optimal converter realization variant circuits were indicated
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2018, 59; 199-202
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktury przetworników jednoczesnych zmian dwóch parametrów dwójników RC o wyjściu częstotliwościowym
Structures of simultaneous two parameter changes of two-port RC network converter with frequency output
Autorzy:
Topór-Kamiński, L.
Guzik, J.
Pilśniak, A.
Powiązania:
https://bibliotekanauki.pl/articles/266867.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
przetwornik zmian składowych impedancji
częstotliwość
oscylator kwadraturowy rzędu trzeciego
transkonduktancyjny wzmacniacz operacyjny
impedance component changes-to-frequency converter
quadrature oscillator
transconductance amplifier
Opis:
W pracy przedstawiono opis struktur nowej klasy przetworników parametrów dwójników RC, np. (R,C) lub (C,tg δ), pozwalających w oparciu o układ oscylatora kwadraturowego rzędu trzeciego na jednoczesny pomiar tych dwóch parametrów, przy czym zmianom jednego z parametrów odpowiadają zmiany wartości pulsacji sygnału wyjściowego przetwornika, natomiast zmianom wartości drugiego z parametrów – odpowiednio – wzrost lub spadek wartości amplitudy generowanych sygnałów. Opisano wybrane warianty realizacji układowych, a także zalety i wady analizowanej klasy przetworników.
In the paper the proposal of new structures of simultaneous two parameter changes of two-port RC network converter with frequency output is presented. The converter is based on third order quadrature oscillator (see Fig.1) where one of the measuring two-port parameters is converted into frequency (see Eq. (1b)), however second parameter changes – suitably converted – to the growth or the fall of amplitude value U1 or U2 of generated signals (see Eqs. (2a) – (2c)). The detailed processing converter variants depended on choice of component impedance parameters (for parameter description - see Fig.1) from the set: {(R0,C0),(R1, C1), (R2,C2), (C0,tgδ0 ), (C1,tg δ1), (C2,tg δ2)}. Recapitulating, the proposed converter solution according to Fig.2 is suitable to processing of (C0, tgδ0) RC two-port component changes. In peculiarity, for case tg δ= tgδ1=tg δ2=ω0RC, the conversion equations are simplifying to the form described by Eqs. (3a) and (4b). The A and B analyzed converter realization variants using the "star - triangle” transformation are presented on Fig.2a,b and Fig.3a,b too. Both variants A and B are characterized however by systematic error δ described by Eq. (5). The advantage of proposed optimal converter realization variant B is the smaller value of error δ in comparison with variant A (see Eq.(6) and Fig.4).
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2017, 54; 225-228
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wyznaczenie parametrów modelu matematycznego transformatora średniej częstotliwości
Parameter determination of medium frequency transformer mathematical model
Autorzy:
Michna, M.
Wilk, A.
Kolincio, M.
Powiązania:
https://bibliotekanauki.pl/articles/267962.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
transformator średniej częstotliwości
rdzeń ferrytowy
pętla histerezy magnetycznej
uzwojenie Litza
medium frequency transformer
ferrite cores
magnetic hysteresis loop
Litz wire
Opis:
W artykule przedstawiono wyniki badań eksperymentalnych transformatora średniej częstotliwości. Obiektem badań był prototyp transformator jednofazowego z rdzeniem wykonanym z prostopadłościennych elementów ferrytowych i uzwojeniami wykonanymi z przewodów Litz’a. Badania przeprowadzono w celu wyznaczenia parametrów modelu matematycznego transformatora. Zakres badań obejmował wyznaczenie pętli histerezy magnetycznej oraz pomiar impedancji uzwojenia. Pętlę histerezy odwzorowano za pomocą statycznego modelu Preisacha ze sprzężeniem zwrotnym.
The paper presents results of experimental research of a single phase medium frequency transformer. The research object was a prototype of a single-phase transformer with a core made of cuboids' ferrite elements and windings made of Litz round wire. The study was conducted to determine the parameters of the transformer mathematical model. The scope of the study included determination of magnetic hysteresis loop and measurement of winding impedance. The hysteresis loop was implemented in MDF model using a static Preisach model with feedback.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2017, 55; 41-44
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
СТИЛИСТИЧЕСКИЙ ПАРАМЕТР В СОВРЕМЕННЫХ РУССКИХ АВТОРСКИХ СЛОВАРЯХ
Stylistic parameter in modern Russian author dictionaries
Autorzy:
Larisa, Shestakova
Powiązania:
https://bibliotekanauki.pl/articles/615366.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Opolski
Tematy:
author lexicography
stylistic label
structural stylistics
explanatory author dictionary
concordance
frequency dictionary
Opis:
The aim of this article is to analyze the practice of using of stylistic labels in modern Russian author (writer) dictionaries. It is shown that labels of this type as the main kind of markers of stylistic information characterize, first of all, the explanatory author dictionaries, which have a full corpus. In these dictionaries the set of the stylistic labels represents the selection from the available nomenclature of labels, which is supplemented by new labels. From the functional point of view, such labels are dual – on the one hand, they stylistically structure the author’s lexicon, on the other hand – they are the markers of certain features of his individual style. Among differential authorexplanatory dictionaries, such ones are separated, in which the stylistically painted specific massifs of lexicon are presented. The stylistic unity of such words defines redundancy of labels and therefore the application of special receptions in relation to them (for example, their transfer in a reference part of the dictionary entry) is used. Special attention is given to author registrative dictionaries (to concordances, frequency dictionaries), in which the structure complication is connected with using of stylistic labels. The research is based on the material of Russian author dictionaries published mainly at the beginning of the year 2000.
Źródło:
Stylistyka; 2017, 26; 7-25
1230-2287
2545-1669
Pojawia się w:
Stylistyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of material non-homogeneity and two parameter elastic foundation on fundamental frequency parameters of Timoshenko beams
Autorzy:
Avcar, M.
Powiązania:
https://bibliotekanauki.pl/articles/1070359.pdf
Data publikacji:
2016-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Bn
62.20.-x
62.25.Jk
89.20.Kk
Opis:
In the present study, effects of material non-homogeneity and two-parameter elastic foundation on the fundamental frequency parameters of the simply supported beams are examined. Material non-homogeneity is characterized taking into account the parabolic variations of Young's modulus and density along the thickness direction of the beam while the value of Poisson's ratio is assumed to remain constant. The foundation medium is assumed to be linear, homogeneous and isotropic, and it is modeled by the Pasternak model with two parameters for describing the reaction of the elastic foundation on the beam. At first, the equation of the motion including the effects of the material non-homogeneity and two-parameter elastic foundation is provided. Then, the solutions including fundamental frequency parameters versus various non-homogeneity, density and foundation parameters, and length to depth ratio adopting the Timoshenko beam theory as well as the Euler-Bernoulli beam theory are presented. To show the accuracy of the present results, a comparison is carried out and a good agreement is found.
Źródło:
Acta Physica Polonica A; 2016, 130, 1; 375-378
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The parameter correlation of acoustic emission and high-frequency vibrations in the assessment process of the operating state of the technical system
Autorzy:
Baron, P.
Dobránsky, J
Pollák, M.
Kočiško, M.
Cmorej, T.
Powiązania:
https://bibliotekanauki.pl/articles/970574.pdf
Data publikacji:
2016
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
technical diagnostics
vibrodiagnostics
analysis of dynamic signal
diagnostyka techniczna
diagnostyka wibracyjna
analiza sygnału
częstotliwość drgań
emisja akustyczna
Opis:
The article describes application of selected methods of technical diagnostics for assessing the operating status of precision gearboxes. Within the confines of experimental measurements in the field of physical metallurgy materials of diagnosed system were being examined while taking into account the process of degradation of material properties during operation of monitored gearboxes. Measurements and collecting of dynamic data were realized on 4 selected gearboxes where a high-frequency vibrations and acoustic emission (noise) measurements were carried out. Retrieved values were subsequently used for mutual correlation and verification of applied methods. Results of both selected methods underlined unsatisfactory operation status with 3 inspected gearboxes. Measured values were identified as being above suggested caution limit of Alarm 2, representing a level of danger.
Źródło:
Acta Mechanica et Automatica; 2016, 10, 2; 112-116
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł

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