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Tytuł:
Quick-response protection system against electric shock in distributed generation systems
Autorzy:
Shkrabets, Fedir
Plaksin, Sergej
Ostapchuk, Oleksandr
Kuznetsov, Valeriy
Tymchenko, Irina
Muntian, Antonina
Powiązania:
https://bibliotekanauki.pl/articles/1840853.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
electric networks
protection
reliability
ground fault current
electrical safety
protection against electric shock
signal processing system
analog filtering
sieci elektryczne
ochrona
niezawodność
bezpieczeństwo elektryczne
ochrona przeciwporażeniowa
system przetwarzania sygnału
filtracja analogowa
Opis:
The peculiarities of the operation of distributed generation systems lead to a change in the requirements for the reliability and safety of the power distribution systems in which they are integrated. To meet the increased requirements, continuous monitoring of the insulation parameters (active resistance and capacitance to ground) is often used with operating artificial non-industrial frequency operational signals introduced into the network. In the case of a sudden touch, such a system is not effective, since the response time of the protection device, which consists of the signal processing time and the operating of the actuator, is crucially important. For the used operational signals with a frequency of 100 and 200 Hz, the processing time using the Fourier transform is 10 ms for 100 Hz and 5 ms for 200 Hz. Considering that the response time of the fastest actuators (based on vacuum switches) is from 3 to 7 ms, this is a rather significant period of time. To develop an effective resolver system, the capabilities of the Matlab environment were used to determine the most successful design of an analog prototype (Butterworth, Bessel, Chebyshev and Cauer of 6th order) for an operational signal with a frequency of 200 Hz. As a result, the processing time was established, which varies widely from 3.5 to 19 ms. Taking into account the known indicators, namely the frequency and number of operational signals, a signal processing system was developed using the vector-matrix analysis method. As a result of modeling the processing characteristics of functional signals (at a sampling rate of 1 kHz), the system quick-response was 3 ms, with the possibility of its further decrease as its productiveness increases.
Źródło:
Diagnostyka; 2021, 22, 3; 59-65
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quick-response protection system against electric shock in distributed generation systems
Autorzy:
Shkrabets, Fedir
Plaksin, Sergej
Ostapchuk, Oleksandr
Kuznetsov, Valeriy
Tymchenko, Irina
Muntian, Antonina
Powiązania:
https://bibliotekanauki.pl/articles/1840876.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
electric networks
protection
reliability
ground fault current
electrical safety
protection against electric shock
signal processing system
analog filtering
sieci elektryczne
ochrona
niezawodność
bezpieczeństwo elektryczne
ochrona przeciwporażeniowa
system przetwarzania sygnału
filtracja analogowa
Opis:
The peculiarities of the operation of distributed generation systems lead to a change in the requirements for the reliability and safety of the power distribution systems in which they are integrated. To meet the increased requirements, continuous monitoring of the insulation parameters (active resistance and capacitance to ground) is often used with operating artificial non-industrial frequency operational signals introduced into the network. In the case of a sudden touch, such a system is not effective, since the response time of the protection device, which consists of the signal processing time and the operating of the actuator, is crucially important. For the used operational signals with a frequency of 100 and 200 Hz, the processing time using the Fourier transform is 10 ms for 100 Hz and 5 ms for 200 Hz. Considering that the response time of the fastest actuators (based on vacuum switches) is from 3 to 7 ms, this is a rather significant period of time. To develop an effective resolver system, the capabilities of the Matlab environment were used to determine the most successful design of an analog prototype (Butterworth, Bessel, Chebyshev and Cauer of 6th order) for an operational signal with a frequency of 200 Hz. As a result, the processing time was established, which varies widely from 3.5 to 19 ms. Taking into account the known indicators, namely the frequency and number of operational signals, a signal processing system was developed using the vector-matrix analysis method. As a result of modeling the processing characteristics of functional signals (at a sampling rate of 1 kHz), the system quick-response was 3 ms, with the possibility of its further decrease as its productiveness increases.
Źródło:
Diagnostyka; 2021, 22, 3; 59-65
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustic signal processing in passive sonar system with towed array
Autorzy:
Raganowicz, A.
Rudnicki, M.
Schmidt, J.
Powiązania:
https://bibliotekanauki.pl/articles/331645.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
sonar system
acoustic signal processing
towed array
Opis:
The aim of this document is to introduce acoustic signal processing in passive sonar system with towed array. The concept of the "acoustic signals processing" includes all possible operations on analogue signals such as amplifying, filtering, sampling and most importantly - operations on digital signals obtained in the sampling process. Digital operations executed in the system include: synchronizing, conversion, sorting, creating deflected beams sets, plotting the power density spectrum received signals and imaging the results. Apart from digital signals processing, we focus on reciprocal connections between microcontrollers and processors in which processing is performed. At the end of this document some exemplary imagings of the output are presented, obtained at the marine testing of this system.
Źródło:
Hydroacoustics; 2008, 11; 329-338
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An integrated dynamic weighing system based on SCADA
Autorzy:
Bazydło, P.
Szewczyk, R.
Urbański, M.
Powiązania:
https://bibliotekanauki.pl/articles/406629.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
SCADA
industrial signal processing
system integration
dynamic weighing
Opis:
A prototyped dynamic weighing system has been presented which integrates together three advanced software environments: MATLAB, LabVIEW and iFIX SCADA. They were used for advanced signal processing, data acquisition, as well as visualization and process control. Dynamic weighing is a constantly developing field of metrology. Because of the highly complicated structure of any electronic weighing module, it is vulnerable to many sources of environmental disturbances. For this reason, there is a lot of research concerned with weighing signal processing, mechanical matters and functionality of the system. In the paper, some issues connected with dynamic weighing have been presented, and the necessity of implementing signal processing methods has been discussed. Implementation of this feature is impossible in the majority of SCADA systems. The integration of the three environments mentioned above is an attempt to create an industrial system with capabilities to deal with major dynamic weighing problems. It is innovative because it connects the industrial SCADA, laboratory/industrial product LabVIEW and MATLAB. In addition, the algorithms responsible for process control and data exchange are presented. The paper includes a description of the capabilities, performance tests, as well as benefits and drawbacks, of the system. The outcome of the research is a prototyped system and evaluation of its usefulness.
Źródło:
Operations Research and Decisions; 2015, 25, 2; 5-18
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of the Acoustic Emission Signals Generated by Partial Discharges in Mineral Oil
Autorzy:
Kunicki, Michał
Powiązania:
https://bibliotekanauki.pl/articles/177772.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
acoustic emission
partial discharge
insulation system
measurements
signal processing
Opis:
The main purpose of the presented research is to investigate the partial discharge (PD) phenomenon variability under long-term AC voltage with particular consideration of the selected physical quantities changes while measured and registered by the acoustic emission method (AE). During the research a PD model source generating surface discharges is immersed in the brand new insulation mineral oil. Acoustic signals generated by the continuously occurred PDs within 168 hours are registered. Several qualitative and quantitative indicators are assigned to describe the PD variability in time. Furthermore, some longterm characteristics of the applied PD model source in mineral oil, are also presented according to acoustic signals emitted by the PD. Finally, various statistical tools are applied for the results analysis and presentation. Despite there are numerous contemporary research papers dealing with long-term PD analysis, such complementary and multiparametric approach has not been presented so far, regarding the presented research. According to the presented research from among all assigned indicators there are discriminated descriptors that could depend on PD long-term duration. On the grounds of the regression models analysis there are discovered trends that potentially allow to apply the results for modeling of the PD variability in time using the acoustic emission method. Subsequently such an approach may potentially support the development and extend the abilities of the diagnostic tools and maintenance policy in electrical power industry.
Źródło:
Archives of Acoustics; 2019, 44, 2; 339-348
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
System Concept of WIFI Based Passive Radar
Autorzy:
Rzewuski, S.
Kulpa, K.
Powiązania:
https://bibliotekanauki.pl/articles/227053.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
passive radar system
WIFI signal decoding
frame detection
processing signal from wireless networks
Opis:
In this paper idea of passive radar system based on popular wireless networks commonly named WIFI is presented. In such an networks many transmitters operates in the same channel using multiple access. Wireless networks operating on frequencies 2.4GHz and 5GHz are very common today (IEEE 802.11 a/b/g/n). Classic passive radar determines bistatic distance and velocity by using cross-ambiguity function. To seek target position in XYZ space at least illumination of 3 different transmitters is required. In that paper it was assumed, that all transmitters operate on the same band frequency and the passive radar receiver has to couple each transmission burst with transmitter position by decoding the physical address of transmitter from captured data stream. Having most of the signal sources in our passive radar environment it is possible to detect and to localize objects of interest.
Źródło:
International Journal of Electronics and Telecommunications; 2011, 57, 4; 447-450
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The 8AE-PD computer measurement system for registration and analysis of acoustic emission signals generated by partial discharges in oil power transformers
Autorzy:
Witos, Franciszek
Opilski, Zbigniew
Szerszeń, Grzegorz
Setkiewicz, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/220623.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
acoustic emission
partial discharge
multichannel system
acoustic signal detection
acoustic signal processing
signal analysis
voltage preamplifier
Opis:
A computer measurement system, designed and built by authors, dedicated to location and description of partial discharges (PD) in oil power transformers examined by means of the acoustic emission (AE) method is presented. The measurement system is equipped with 8 measurement channels and ensures: monitoring of signals, registration of data in real time within a band of 25-1000 kHz in laboratory and real conditions, basic and advanced analysis of recorded signals. The basic analysis carried out in the time, frequency and time-frequency domains deals with general properties of the AE signals coming from PDs. The advanced analysis, performed in the discrimination threshold domain, results in identification of signals coming from different acoustic sources as well as location of these sources in the examined transformers in terms of defined by authors descriptors and maps of these descriptors on the side walls of the tested transformer tank. Examples of typical results of laboratory tests carried out with the use of the built-in measurement system are presented.
Źródło:
Metrology and Measurement Systems; 2019, 26, 2; 403-418
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnostics of the drive shaft bearing based on vibrations in the high-frequency range as a part of the vehicles self-diagnostic system
Autorzy:
Nowakowski, Tomasz
Komorski, Pawel
Powiązania:
https://bibliotekanauki.pl/articles/2057986.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
self-diagnostic system
vibration
vehicles
signal processing methods
decision trees
Opis:
Currently, one of the trends in the automotive industry is to make vehicles as autonomous as possible. In particular, this concerns the implementation of complex and innovative selfdiagnostic systems for cars. This paper proposes a new diagnostic algorithm that evaluates the performance of the drive shaft bearings of a road vehicle during use. The diagnostic parameter was selected based on vibration measurements and machine learning analysis results. The analyses included the use of more than a dozen time domain features of vibration signal in different frequency ranges. Upper limit values and down limit values of the diagnostic parameter were determined, based on which the vehicle user will receive information about impending wear and total bearing damage. Additionally, statistical verification of the developed model and validation of the results were performed.
Źródło:
Eksploatacja i Niezawodność; 2022, 24, 1; 70--79
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Large Data Stream Processing : Embedded Systems Design Challenges
Autorzy:
Handzlik, A.
Jabłonski, A.
Powiązania:
https://bibliotekanauki.pl/articles/226898.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
reconfigurable hardware
system on chip
digital signal processing
embedded systems
Opis:
The following paper describes an application of reconfigurable hardware architectures for processing of huge data streams. Radar, sonar and high speed internet networks are typical sources of data that require extreme computing power and resources to enable real time acquisition, processing and management. An approach to monitoring of real time multi-gigabit internet network has been described as a practical application of FPGA based board, designed for fast data processing.
Źródło:
International Journal of Electronics and Telecommunications; 2010, 56, 2; 107-110
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of A/D quantization in an interpolated DFT based system of power control with a small delay
Autorzy:
Borkowski, J.
Kania, D.
Mroczka, J.
Powiązania:
https://bibliotekanauki.pl/articles/221386.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
photovoltaic system
frequency estimation
signal processing
A/D converter
control of power system
Opis:
Fast and accurate grid signal frequency estimation is a very important issue in the control of renewable energy systems. Important factors that influence the estimation accuracy include the A/D converter parameters in the inverter control system. This paper presents the influence of the number of A/D converter bits b, the phase shift of the grid signal relative to the time window, the width of the time window relative to the grid signal period (expressed as a cycle in range (CiR) parameter) and the number of N samples obtained in this window with the A/D converter on the developed estimation method results. An increase in the number b by 8 decreases the estimation error by approximately 256 times. The largest estimation error occurs when the signal module maximum is in the time window center (for small values of CiR) or when the signal value is zero in the time window center (for large values of CiR). In practical applications, the dominant component of the frequency estimation error is the error caused by the quantization noise, and its range is from approximately 8×10-10 to 6×10-4.
Źródło:
Metrology and Measurement Systems; 2014, 21, 3; 423-432
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On-line process identification using the Modulating Functions Method and non-asymptotic state estimation
Autorzy:
Byrski, Witold
Drapała, Michał
Powiązania:
https://bibliotekanauki.pl/articles/2175109.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
system identification
modulating functions method
state observers
signal processing
adaptive algorithms
Opis:
The paper presents an iterative identification method dedicated for industrial processes. The method consists of two steps. In the first step, a MISO system is identified with the Modulating Functions Method to obtain sub-models with a common denominator. In the second step, the obtained subsystems are re-identified. This procedure enables to obtain the set of models with different denominators of the transfer functions. The algorithm was used for on-line identification of a glass conditioning process. Identification window is divided into intervals, in which the models can be updated based on recent process data, with the use of the integral state observer. Results of the performed simulations for the identified models are compared with the historical process data.
Źródło:
Archives of Control Sciences; 2022, 32, 3; 535--555
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
LMS Algorithm Step Size Adjustment for Fast Convergence
Autorzy:
Bismor, D.
Powiązania:
https://bibliotekanauki.pl/articles/177252.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
signal processing
adaptive algorithms
least mean squares
active noise control
system identification
Opis:
In the areas of acoustic research or applications that deal with not-precisely-known or variable condi- tions, a method of adaptation to the uncertainness or changes is usually necessary. When searching for an adaptation algorithm, it is hard to overlook the least mean squares (LMS) algorithm. Its simplicity, speed of computation, and robustness has won it a wide area of applications: from telecommunication, through acoustics and vibration, to seismology. The algorithm, however, still lacks a full theoretical analysis. This is probabely the cause of its main drawback: the need of a careful choice of the step size – which is the reason why so many variable step size flavors of the LMS algorithm has been developed. This paper contributes to both the above mentioned characteristics of the LMS algorithm. First, it shows a derivation of a new necessary condition for the LMS algorithm convergence. The condition, although weak, proved useful in developing a new variable step size LMS algorithm which appeared to be quite different from the algorithms known from the literature. Moreover, the algorithm proved to be effective in both simulations and laboratory experiments, covering two possible applications: adaptive line enhancement and active noise control.
Źródło:
Archives of Acoustics; 2012, 37, 1; 31-40
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selekcja cech osobniczych sygnału mowy z wykorzystaniem algorytmów genetycznych
Autorzy:
Kamiński, Kamil
Dobrowolski, Andrzej P.
Majda, Ewelina
Powiązania:
https://bibliotekanauki.pl/articles/111176.pdf
Data publikacji:
2019
Wydawca:
Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
Tematy:
mowa
głos
system automatycznego rozpoznawania mowy
przetwarzanie sygnałów
speech
voice
speech recognition system
signal processing
Opis:
W referacie przedstawiono system automatycznego rozpoznawania mówcy zaimplementowany w środowisku Matlab oraz pokazano sposoby realizacji i optymalizacji poszczególnych elementów tego systemu. Główny nacisk położono na wyselekcjonowanie cech dystynktywnych głosu mówcy z wykorzystaniem algorytmu genetycznego, który pozwala na uwzględnienie synergii cech podczas selekcji. Pokazano również wyniki optymalizacji wybranych elementów klasyfikatora, m.in. liczby rozkładów Gaussa użytych do zamodelowania każdego z głosów. Ponadto, podczas tworzenia modeli głosów zastosowano model głosu uniwersalnego.
The paper presents automatic speaker recognition system, implemented in the Matlab environment, and demonstrates how to achieve and optimize various elements of the system. The main emphasis was put on features selection of speech signal using a genetic algorithm, which takes into account synergy of features. The results of the selected elements of optimizing classifier have been also shown, including the number of Gaussian distributions used to model each of the voices. In addition during creating voice models, the universal voice model have been used.
Źródło:
Inżynieria Bezpieczeństwa Obiektów Antropogenicznych; 2019, 1-2; 8-16
2450-1859
2450-8721
Pojawia się w:
Inżynieria Bezpieczeństwa Obiektów Antropogenicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza dokładności przetwarzania sygnału w torze pomiarowym cyfrowego terminalu automatyki elektroenergetycznej - wybrane wyniki badań
Accuracy analysis of signal processing in the measuring chain of a digital power system protection unit - selected investigation results
Autorzy:
Halinka, A.
Topór-Kamiński, L.
Szewczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/154921.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
cyfrowe przetwarzanie sygnałów
elektroenergetyczna automatyka zabezpieczeniowa
digital signal processing
power system protection automation
Opis:
W artykule zostaną przedstawione wyniki badań układów wejściowych wybranego zabezpieczenia cyfrowego. Przeprowadzona zostanie wstępna analiza poprawności ich pracy w przypadku sygnałów wejściowych w postaci mono- i poliharmonicznych sygnałów napięciowych i prądowych o zmiennej amplitudzie i częstotliwości. Badany układ toru przetwarzania analogowo-cyfrowego zabezpieczenia elektroenergetycznego wykazuje dobre właściwości pomiarowe zarówno dla sygnałów prądowych jak i napięciowych.
Today's digital technology makes it possible to construct power system protection devices characterized by the so-called open architecture. It assumes that such devices can easily adapt their hardware and software functions to the automation tasks of different power system objects. Additionally, these units, owing to strong teleinformatic interconnections, enable using the common databases (knowledge bases) about the object and its environment (Fig. 2). As far as the decision-making is concerned, there has been observed the rapid growth in development of adaptive techniques (both configurational and frequencional adaptation) as well as multicticriterial decision-making lately. Increase in the processing power of protection system elementary units and availability of access to the data and information about the object and its environment lead to the possibility of using unconventional decision-making structures, i.e. artificial neural networks, fuzzy logic and dispersed algorithms. Therefore, it seems that a major factor influencing the "quality" of decisions made by protection devices is the reliable measurement data and input information obtained mainly from the so-called digital signal processing chain of the elementary unit in a protection system which, additionally, have to be achieved under strict time limitations. The paper presents investigation results concerning input units of a selected digital power protection device verifying the accuracy of the mentioned units in the case of monoharmonic and poliharmonic current and voltage signals of varying amplitudes and frequencies. The tests performed show that the measurement input chain of the digital protection device has good measurement properties for both current and voltage signals. Some results of the voltage input properties for high voltage (above the rated one) restrict the possible application of such devices to the protections that make decisions on the basis of undervoltage and overcurrent criteria or their combinations.
Źródło:
Pomiary Automatyka Kontrola; 2009, R. 55, nr 9, 9; 769-773
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research and Medical Transcranial Doppler System
Autorzy:
Lewandowski, M.
Walczak, M.
Karwat, P.
Witek, B.
Karłowicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/177389.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Doppler system
digital signal processing
hardware-software partitioning
field programmable gate array (FPGA)
Opis:
A new ultrasound digital transcranial Doppler system (digiTDS) is introduced. The digiTDS enables diagnosis of intracranial vessels which are rather difficult to penetrate for standard systems. The device can display a color map of flow velocities (in time-depth domain) and a spectrogram of a Doppler signal obtained at particular depth. The system offers a multigate processing which allows to display a numer of spectrograms simultaneously and to reconstruct a flow velocity profile. The digital signal processing in digiTDS is partitioned between hardware and software parts. The hardware part (based on FPGA) executes a signal demodulation and reduces data stream. The software part (PC) performs the Doppler processing and display tasks. The hardware-software partitioning allowed to build a flexible Doppler platform at a relatively low cost. The digiTDS design fulfills all necessary medical standards being a new useful tool in the transcranial field as well as in heart velocimetry research.
Źródło:
Archives of Acoustics; 2016, 41, 4; 773-781
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MULTI-EDIP - an intelligent software package for computer-aided multivariate signal and system identification
Autorzy:
Kasprzyk, J.
Figwer, J.
Powiązania:
https://bibliotekanauki.pl/articles/229907.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
computer-aided system identification
parametric model identification
nonparametric model identification
digital signal processing
Opis:
In the paper an intelligent software package MULTI-EDIP for computer-aided identification of multivariate signals and systems is presented. Purposes and main requirements for computer-aided identification are discussed. A summary of the most important MULTI-EDIP services with a focus on expert advice is described. An example of using the package in electroacoustic plant identification for active noise control system development is presented.
Źródło:
Archives of Control Sciences; 2013, 23, 4; 427-446
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of a complex multiplier based on the convolution with the use of the polynomial residue number system
Projektowanie mnożnika zespolonego oparte na splocie z użyciem wielomianowego systemu resztowego
Autorzy:
Smyk, R.
Czyżak, M.
Ulman, Z.
Powiązania:
https://bibliotekanauki.pl/articles/154071.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
cyfrowe przetwarzanie sygnałów
mnożenie zespolone
wielomianowy system resztowy
digital signal processing
complex multiplication
polynomial residue number system
Opis:
The complex multiplication is one of the basic operations in digital signal processing. In this work the design procedure of the complex multiplier based on the well-known decomposition algorithm of Skavantzos and Stouraitis is presented. The algorithm makes use of encoding n-bit numbers as polynomials of degree 7 in the ring of polynomials modulo with -bit coefficients. The complex multiplication is carried out as an eight point cyclic convolution. The design procedure is illustrated by the computational example and design of a small multiplier.
Mnożenie zespolone jest jedną z podstawowych operacji w cyfrowym przetwarzaniu sygnałów. W niniejszej pracy przestawiono metodę projektowania mnożników zespolonych opartą na znanym algorytmie dekompozycji Skavantzosa and Stouraitisa. W algorytmie tym stosuje się kodowanie liczb n-bitowych jako wielomianów stopnia 7 w pierścieniu wielomianów modulo ze współczynnikami -bitowymi. Mnożenie zespolone jest następnie realizowane jako 8-punktowy splot cykliczny. Proponowaną metodę projektowania zilustrowano przykładem obliczeniowym oraz przykładowym projektem mnożnika.
Źródło:
Pomiary Automatyka Kontrola; 2007, R. 53, nr 4, 4; 68-71
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Obrabotka parametrov chastic vodnykh rastvorov pri intensifikacii raboty oborotnykh sistem vodosnabzhenija
Autorzy:
Movchan, S.
Powiązania:
https://bibliotekanauki.pl/articles/77013.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
processing
aqueous solution
water supply system
mechanical parameter
hydraulic parameter
optical method
Doppler signal amplitude
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 6
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A mixed signal ASIC for detection of acoustic emergency signals in road traffic
Autorzy:
Mielke, M.
Schäfer, A.
Brück, R.
Powiązania:
https://bibliotekanauki.pl/articles/398059.pdf
Data publikacji:
2010
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
automatyczne wykrywanie syren
cyfrowe przetwarzanie sygnałów
system wspomagania kierownicy
zmiksowany sygnał układu scalonego
automatic siren detection
digital signal processing
driver assistance system
mixed signal integrated circuit
Opis:
In larger cities, emergency vehicles of fire services, emergency services, and police are often impeded by other road users. Although the emergency vehicles use visual and acoustic warning signals to become noticeable, they are not always perceived soon by other road users. This can lead to dangerous traffic situations, unacceptable delay for the emergency vehicle, and even accidents with other road users. To address this issue, and raise the awareness, and lower the reaction time of the driver, a driver assistance system was developed which monitors the ambient noise behind the car and informs the driver when an acoustic emergency signal is detected. Special attention was paid to simplicity of the algorithm for easy implementation in an integrated circuit. The circuit is not only applicable in road traffic. It can also form a basis for environmental sound interpretation for the use in assistive listening devices.
Źródło:
International Journal of Microelectronics and Computer Science; 2010, 1, 2; 105-111
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibroacoustic condition monitoring of the complex rotation system based on multilevel signal processing
Autorzy:
Pazdrii, Olha
Bouraou, Nadiia
Powiązania:
https://bibliotekanauki.pl/articles/2146575.pdf
Data publikacji:
2020
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
rotation system
signal processing
bispectrum analysis
fractal box-counting dimension
system rotacyjny
przetwarzanie sygnałów
analiza bispektralna
fraktalny wymiar pudełkowy
Opis:
This work is devoted to further research and improvement of the vibroacoustic condition monitoring of complex rotation system during operation. The low-frequency vibration and acoustic noise in the range 0-10 kHz is used as diagnostic information. We propose to use Bispectrum (BS) Analysis at the first level of signal processing, and Fractal Analysis of BS contour images at the second level of signal processing for the diagnosis of small imbalance of rotation system. The experimental studies of forced vibrations of the physical model (PM) of the rotation system are carried out under steady-state and non-steady-state rotation excitations. The results of the BS Analysis of vibroacoustical signals, which are emitted by a rotating PM during different excitation modes, are processed in order to determine fractal box-counting dimension (Minkowski dimension). The research shows that a small imbalance can be efficiently detected by the proposed multilevel signal processing in all modes of PM operation.
Źródło:
Vibrations in Physical Systems; 2020, 31, 2; art. no. 2020224
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza wydajności obliczeniowej systemu pomiarowego jakości energii elektrycznej opartego na urządzeniu embedded BeagleBoard z systemem operacyjnym Linux
An efficiency analysis of the power quality monitoring system based on BeagleBoard embedded with Linux operating system
Autorzy:
Zygarlicki, J.
Mroczka, J.
Powiązania:
https://bibliotekanauki.pl/articles/274929.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
analiza sygnałów
jakość energii elektrycznej
metoda Prony’ego
urządzenie wbudowane
przetwarzanie sygnałów
signal analysis
power quality
Prony's method
embedded system
signal processing
Opis:
W artykule przedstawiono możliwości zastosowania niskobudżetowego modułu embedded BeagleBoard na bazie procesora OMAP firmy Texas Instruments, działającego pod kontrolą systemu Linux, do budowy zaawansowanego urządzenia pomiarowego parametrów jakości energii elektrycznej. W artykule przeanalizowano czasy obliczeń złożonych algorytmów przetwarzania sygnałów na przykładzie metody Prony'ego, mogących mieć zastosowanie przy wyznaczaniu parametrów jakości energii elektrycznej. Czasy te będą porównane z czasami obliczeń dla typowych urządzeń klasy PC o architekturze 8086. Dodatkowo zostaną pokazane możliwości dołączenia do systemu urządzeń peryferyjnych oraz sond pomiarowych.
The article show the possibilities of use of the low cost BeagleBoard embedded system based on Texas Instruments OMAP processor with Linux operating system used for advanced power quality monitoring system. The authors show analysis results of the required time computation for presented advanced signal analysis methods like Prony's method, which can be used for power quality parameters estimation. The results were compared with computations made for PC standard computers, with x86 architecture. Additional, the article show possibility of peripheral devices connections to the presented system.
Źródło:
Pomiary Automatyka Robotyka; 2010, 14, 12; 50-52
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Basic solutions for a program system for dynamic systems simulation
Autorzy:
Timofeev, A. O.
Powiązania:
https://bibliotekanauki.pl/articles/92971.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
dynamic system simulation
creating interactive applications
Amethyst program system
calculating the component state
decentralized processing the signal delays
filtering
analog objects simulating
Opis:
The article presents basic solutions of the Amethyst program system. The system generates interactive applications for simulating complex dynamic systems. The method of presenting the information about the state of the simulated objects and method of calculating the component state are proposed. Method of decentralized processing the signal delays and filtering is discussed. Method of analog objects simulating is proposed. The article presents examples of projects produced for C++ Builder, Visual C++ and Visual Basic 2005 environment projects. The executable times of simulation are compared for the above mentioned environment applications.
Źródło:
Studia Informatica : systems and information technology; 2006, 1(7); 255-263
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tabular minimal redundant modular structures for fast and high-precision computations using general-purpose computers
Autorzy:
Selianinau, M.
Powiązania:
https://bibliotekanauki.pl/articles/122002.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
arytmetyka modularna
system modułowy
procesory wielordzeniowe
zastosowanie komputerów
cyfrowe przetwarzanie sygnału
modular arithmetic
modular system
multicore processors
computer applications
digital signal processing
Opis:
The present paper is a continuation of research in parallel information processing based on the tabular modular computing structures. We deal with the methodology of using a minimal redundant modular number system for high-speed and high-precision computation by means of modern universal multicore processors. Advantages of formal computing mode on the base of modular arithmetic are demonstrated by the example of implementation of digital signal processing procedures. The additive and additive multiplicative formal computing schemes with the obtained estimations of the cardinality of working ranges for the realization of calculations are presented in the article.
Źródło:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics; 2017, 22; 129-139
2450-9302
Pojawia się w:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effective residue-to-binary converter with the Chinese Remainder Theorem
Efektywna konwersja liczb z systemu resztowego do systemu wagowego z uzyciem chińskiego twierdzenia o resztach
Autorzy:
Ulman, Z.
Czyżak, M.
Powiązania:
https://bibliotekanauki.pl/articles/152042.pdf
Data publikacji:
2003
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
cyfrowe przetwarzanie sygnałów
szybka arytmetyka komputerowa
resztowy system liczbowy
digital signal processing
fast computer arithmetic
residue number system
residue-to-binary converter
Opis:
The residue-to-binary conversion is the key operation in all digital signal processing applications that use the Residue Number System (RNS). In this work a new conversion technique based on the Chinese Remainder Theorem (CRT) for 5- and 6-bit moduli is proposed. It is especially suited for the realization with the use of binary arithmetic. the specific property of the realization with the use of binary arithmetic. The specific property of the technique is a way of calculation of the excess factor r in the CRT formula that makes possible, under certain conditions, the reduction of processed numbers from the range [0,nM) to [0,2M) where "M" is the product of moduli. This is done by replacing the calculation of "r" by the computation of the result of division of the sum of projections by a power of 2 close to M. Such approach allows for very effective hardware realization of the converter. Only small ROM`s and standard binary adders are required. Moreover, the pipelining on the Full-Adder (FA) level possible.
Konwersja liczb z systemu resztowego do systemu binarnego jest podstawową operacją we wszystkich układach cyfrowego przetwarzania sygnałów, które wykorzystują system resztowy. W niniejszej pracy zaproponowano nowa metodę konwersji opartą o chinskie twierdzenie o resztach dla modułów 5- i 6-bitowych. Specyficzną cechą nowej metody jest sposób obliczania tzw. współczynnika pomiaru "r" w formule chińskiego twierdzenia o resztach, co umożliwia pod pewnymi warunkami, redukcję przetwarzanych liczb z zakresu [0,nM) do [0,2M). Jest to realizowane poprzez zastąpienie obliczania "r" obliczaniem rB, gdzie M jest potęgą liczby 2 bliska M. Takie podejście pozwala na bardzo efektywną sprzętową realizację konwertora. Konieczne są tylko małe pamięci typu ROM i standardowe sumatory binarne. ponadto możliwa jest realizacja potokowa z częstotliwością ograniczoną opóźnieniem sumatora 1-bitowego.
Źródło:
Pomiary Automatyka Kontrola; 2003, R. 49, nr 12, 12; 34-38
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnosis support method of pletysmographical records with the use of framework tenets
Autorzy:
Penhaker, M.
Powiązania:
https://bibliotekanauki.pl/articles/333197.pdf
Data publikacji:
2003
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
przetwarzanie sygnałów
pletyzmografia
transformata falkowa
system ekspercki
rozszerzenie jądra
signal processing
plethysmography
wavelet transform
expert systems
framework
kernel extension
Opis:
The aim of this study is the processing and evaluating of plethysmographical records giving important information about the blood vessel function. Result of this study is to present the methodology for classifying the records by means of mathematical methods that would contribute to systematic evaluation of what has been found by finger plethysmography. Thereafter the experimental expert system based on framework systems serves to determine the diagnosis on the basis of previous mathematical processing is introduced. The goal of the project was also creation of application by the form of the extension of kernel for the use of framework that is determined for support of control and information systems development in the area of signal processing, elaborate and describe the methodology of extension hereof setting in the nature of specific applications. Beyond above-mentioned outputs the solution of the project should give the specific knowledge about the usage effectiveness of evolutional frameworks. Fundamental implementation idea is based on the usage of MATLAB as the basis for extension of common kernel.
Źródło:
Journal of Medical Informatics & Technologies; 2003, 5; MI121-127
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
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