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Tytuł:
The correct selection of diagnostic parameters of marine diesel engine and their minimization of as a necessary action in the formation of diagnostic algorithm
Autorzy:
Witkowski, K
Powiązania:
https://bibliotekanauki.pl/articles/247369.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
ship diesel engine
diagnostic parameters
diagnostics programs
experimental data
Fault Isolation System
Opis:
This article describes the methodology of creating algorithms and diagnostic programs. Still in the construction of such algorithms and diagnostic creating programs mostly is used classical approach, the methodological basis can be reduced to the several basic tasks. One of them is the proper selection and minimization of diagnostic parameters. The article shows the importance of proper selection and minimization of diagnostic parameters on the example of the diagnostics of the injection system of a marine diesel engine. It was indicated to practical usefulness for this purpose calculated the values sensitivity of a given parameter. The stronger the diagnostic parameter responds to a change in the structural parameter, the greater its diagnostic sensitivity is and thus the early development of a given fault can be detected based on deviation analysis of this parameter from its reference value. Based on experimental data, FIS (Fault Isolation System) matrix was built after selecting and minimizing diagnostic parameters. Triple-valued evaluation of residues (–1, 0, +1) was used. The research was carried out on a real object – a four-stroke, mediumspeed marine engine from Sulzer. The impact of selected fault in the injection system on the diagnostic parameters was researched and a FIS (Fault Isolation System) matrix was built on this basis.
Źródło:
Journal of KONES; 2017, 24, 2; 287-292
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fault isolability with different forms of the faults–symptoms relation
Autorzy:
Kościelny, J. M.
Syfert, M.
Rostek, K.
Sztyber, A.
Powiązania:
https://bibliotekanauki.pl/articles/330460.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fault diagnosis
fault isolation
symptom sequence
information system
diagnostyka uszkodzeń
lokalizacja uszkodzeń
sekwencja symptomów
system informacyjny
Opis:
The definitions and conditions for fault isolability of single faults for various forms of the diagnostic relation are reviewed. Fault isolability and unisolability on the basis of a binary diagnostic matrix are analyzed. Definitions for conditional and unconditional isolability and unisolability on the basis of a fault information system (FIS), symptom sequences and directional residuals are formulated. General definitions for conditional and unconditional isolability and unisolability in the cases of simultaneous evaluation of diagnostic signal values and a sequence of symptoms are provided. A comprehensive example is discussed.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2016, 26, 4; 815-826
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Input reconstruction by means of system inversion: A geometric approach to fault detection and isolation in nonlinear systems
Autorzy:
Edelmayer, A.
Bokor, J.
Szabo, Z.
Szigeti, F.
Powiązania:
https://bibliotekanauki.pl/articles/907385.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
detekcja uszkodzeń
lokalizacja uszkodzeń
układ liniowy
układ nieliniowy
inwersja systemu
fault detection
fault isolation
input reconstruction
linear system
nonlinear system
system inversion
Opis:
In this paper the classical detection filter design problem is considered as an input reconstruction problem. Input reconstruction is viewed as a dynamic inversion problem. This approach is based on the existence of the left inverse and arrives at detector architectures whose outputs are the fault signals while the inputs are the measured system inputs and outputs and possibly their time derivatives. The paper gives a brief summary of the properties and existence of the inverse for linear and nonlinear multivariable systems. A view of the inversion-based input reconstruction with special emphasis on the aspects of fault detection and isolation by using invariant subspaces and the results of classical geometrical systems theory is provided. The applicability of the idea to fault reconstruction is demonstrated through examples.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2004, 14, 2; 189-199
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parameter Estimation Based Fault Detection and Isolation in Wiener and Hammerstein Systems
Autorzy:
Janczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/908281.pdf
Data publikacji:
1999
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
wykrywanie błędu
wyodrębnienie błędu
estymacja parametryczna
sieć neuronowa
system nieliniowy
fault detection
fault isolation
parameter estimation
neural networks
nonlinear system
Opis:
Fault detection and isolation in Wiener and Hammerstein systems via generation and processing of residual sequences is considered. We assume that some models of the unfaulty Wiener and Hammerstein systems under consideration are known. For Wiener systems, we also assume that their static nonlinear subsystems are invertible. Then, based on a serial-parallel definition of the residual error, new fault detection and isolation methods are proposed.To detect and identify all the changes in both the Wiener and Hammerstein system parameters, the sequences of residuals are processed by using linear regression methods or a neural network approach.
Źródło:
International Journal of Applied Mathematics and Computer Science; 1999, 9, 3; 711-735
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Double fault distinguishability in linear systems
Autorzy:
Kościelny, J. M.
Łabęda-Grudziak, Z. M.
Powiązania:
https://bibliotekanauki.pl/articles/331134.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fault isolation
double fault
fault distinguishability
structured residuals
directional residuals
secondary residuals
linear system
lokalizacja uszkodzeń
rozróżnialność uszkodzeń
układ liniowy
Opis:
This paper develops a new approach to double fault isolation in linear systems with the aid of directional residuals. The method of residual generation for computational as well as internal forms is applied. Isolation of double faults is based on the investigation of the coplanarity of the residual vector with the planes defined by the individual pairs of directional fault vectors. Additionally, the method of designing secondary residuals, which are structured and directional, is proposed. These transformations allow achieving various isolation properties. It is shown that double fault distinguishability can be improved by decomposing the observed residual vector along the response directions. The described methods are illustrated with a simple computational example.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2013, 23, 2; 395-406
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A data driven fault isolation method based on reference faulty situations with application to a nonlinear chemical process
Autorzy:
Ragot, José
Mourot, Gilles
Kallas, Maya
Powiązania:
https://bibliotekanauki.pl/articles/2172122.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fault detection
fault isolation
nonlinear system
data modelling
kernel
wykrywanie uszkodzeń
izolacja uszkodzeń
układ nieliniowy
modelowanie danych
Opis:
The diagnosis of systems is one of the major steps in their control and its purpose is to determine the possible presence of dysfunctions, which affect the sensors and actuators associated with a system but also the internal components of the system itself. On the one hand, the diagnosis must therefore focus on the detection of a dysfunction and, on the other hand, on the physical localization of the dysfunction by specifying the component in a faulty situation, and then on its temporal localization. In this contribution, the emphasis is on the use of software redundancy applied to the detection of anomalies within the measurements collected in the system. The systems considered here are characterized by non-linear behaviours whose model is not known a priori. The proposed strategy therefore focuses on processing the data acquired on the system for which it is assumed that a healthy operating regime is known. Diagnostic procedures usually use this data corresponding to good operating regimes by comparing them with new situations that may contain faults. Our approach is fundamentally different in that the good functioning data allow us, by means of a non-linear prediction technique, to generate a lot of data that reflect all the faults under different excitation situations of the system. The database thus created characterizes the dysfunctions and then serves as a reference to be compared with real situations. This comparison, which then makes it possible to recognize the faulty situation, is based on a technique for evaluating the main angle between subspaces of system dysfunction situations. An important point of the discussion concerns the robustness and sensitivity of fault indicators. In particular, it is shown how, by non-linear combinations, it is possible to increase the size of these indicators in such a way as to facilitate the location of faults.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2022, 32, 4; 635--655
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Generalized reasoning about faults based on the diagnostic matrix
Autorzy:
Bartyś, M.
Powiązania:
https://bibliotekanauki.pl/articles/330190.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fault isolation
binary diagnostic matrix
fault information system
alternative fault signature
dominant fault signature
matrix of alternative fault signatures
fuzzy diagnosis
lokalizacja uszkodzeń
binarna macierz diagnostyczna
sygnatura alternatywna
Opis:
This paper introduces a set of comprehensive general reasoning rules about single faults based on a diagnostic matrix. The reasoning scheme unifies inference about faults based on a conventional binary diagnostic matrix, a two- and three-valued fault isolation system as well as on their fuzzy counterparts. There are introduced and defined notions of alternative and dominant fault signatures, fuzzy fault signatures as well as a matrix of alternative signatures. This matrix is supposed to be used instead of the classic diagnostic one. It is also shown that dominant fault signatures are transformable into alternative ones. Finally, three variants of concise general reasoning rules of faults are given. Three examples illustrate key point issues of the paper. The first example refers to a medical diagnostic case. It shows an instance of dominant fault signatures and, in fact, proposes a rational approach for planning diagnostic tests. The other examples describe the fuzzy reasoning approach employing a matrix of fuzzy alternative signatures applicable for use with multi-valued fuzzy diagnostic signals. Future works are outlined in the summary section.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2013, 23, 2; 407-417
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Expert System Coupled With a Hierarchical Structure of Fuzzy Neural Networks for Fault Diagnosis
Autorzy:
Calado, J. M. F.
Costa, I. S.
Powiązania:
https://bibliotekanauki.pl/articles/908283.pdf
Data publikacji:
1999
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
rozpoznanie błędu
wykrywanie błędu
system ekspertowy
sieć neuronowa rozmyta
fault diagnosis
fault detection
fault isolation
shallow knowledge
deep knowledge
expert system
fuzzy neural network
abrupt faults
incipient faults
Opis:
An on-line fault diagnosis system, designed to be robust to the normal transient behaviour of the process, is described. The overall system consists of an expert system cascade with a hierarchical structure of fuzzy neural networks, corresponding to a multi-stage fault detection and isolation system. The fault detection is performed through the expert system by means of fault detection heuristic rules, generated from deep and shallow knowledge of the process under consideration. If a fault is detected, the hierarchical structure of fuzzy neural networks starts and it performs the fault isolation task. The structure of this diagnosis system was designed to allow for the diagnosis of single and multiple simultaneous abrupt and incipient faults from only single abrupt fault symptoms. Also, it combines the advantages of both fuzzy reasoning and neural networks learning capacity. A continuous binary distillation column has been used as a test bed of the current approach. Single, double and triple simultaneous abrupt faults, as well as incipient faults, have been considered. The preliminary results obtained show a good accuracy, even in the case of multiple faults.
Źródło:
International Journal of Applied Mathematics and Computer Science; 1999, 9, 3; 667-687
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Switching time estimation and active mode recognition using a data projection method
Autorzy:
Hakem, A.
Cocquempot, V.
Pekpe, K. M.
Powiązania:
https://bibliotekanauki.pl/articles/330702.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
switching system
mode recognition
fault detection
fault isolation
data driven method
mode discernability
switching detectability
fault identifiability
system przełączania
tryb rozpoznawania
detekcja uszkodzeń
lokalizacja uszkodzeń
tryb rozróżnialności
identyfikowalność uszkodzeń
Opis:
This paper proposes a data projection method (DPM) to detect a mode switching and recognize the current mode in a switching system. The main feature of this method is that the precise knowledge of the system model, i.e., the parameter values, is not needed. One direct application of this technique is fault detection and identification (FDI) when a fault produces a change in the system dynamics. Mode detection and recognition correspond to fault detection and identification, and switching time estimation to fault occurrence time estimation. The general principle of the DPM is to generate mode indicators, namely, residuals, using matrix projection techniques, where matrices are composed of input and output measured data. The DPM is presented in detail, and properties of switching detectability (fault detectability) and discernability between modes (fault identifiability) are characterized and discussed. The great advantage of this method, compared with other techniques in the literature, is that it does not need the model parameter values and thus can be applied to systems of the same type without identifying their parameters. This is particularly interesting in the design of generic embedded fault diagnosis algorithms.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2016, 26, 4; 827-840
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design station for fault tolerant control systems
Stanowisko projektowania systemów sterowania tolerujących uszkodzenia
Autorzy:
Wasiewicz, P.
Leszczyński, M.
Powiązania:
https://bibliotekanauki.pl/articles/258270.pdf
Data publikacji:
2006
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
sterowanie tolerujące uszkodzenia
FTC
zabezpieczenia systemu
rekonfiguracja systemu
detekcja i lokalizacja uszkodzeń
FDI
fault tolerant control
system protection
system reconfiguration
fault detection and isolation
Opis:
The presented station prepared for the design of fault tolerant control (FTC) systems has been created in the Institute of Automatic Control and Robotics at Warsaw University of Technology. It consists of the hydraulic installation equipped with Emerson's instrumentation, DeltaV-control system and AMandD-advanced monitoring and diagnostic system. The fault tolerance of certain sensors, controllers, actuators, and process components can be achieved by the use of functional redundancy, which consists in the performance of appropriate changes in the operation manner of the faulty system. The various industrial FTC applications and new diagnostic-protection algorithms can be developed on the basis of considered station.
Zaprezentowano stanowisko do projektowania systemów sterowania tolerujących uszkodzenia (FTC) opracowane i zrealizowane w Instytucie Automatyki i Robotyki Politechniki Warszawskiej. Składa się ono z instalacji hydraulicznej wyposażonej w oprzyrządowanie firmy Emerson, system sterowania Delta V oraz zaawansowany system monitorowania i diagnostyki procesów AMandD. Tolerowanie uszkodzeń urządzeń pomiarowych i wykonawczych oraz elementów instalacji technologicznej jest osiągane poprzez zastosowanie redundancji funkcjonalnej polegającej na dokonywaniu odpowiednich zmian w sposobie działania uszkodzonego systemu. Stanowisko umożliwia przygotowywanie przemysłowych aplikacji systemów FTC oraz opracowywanie nowych algorytmów diagnostyczno-zabezpieczających.
Źródło:
Problemy Eksploatacji; 2006, 2; 99-111
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SMAC-FDI: A single model active fault detection and isolation system for unmanned aircraft
Autorzy:
Ducard, G. J. J.
Powiązania:
https://bibliotekanauki.pl/articles/331366.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fault detection
fault isolation
unmanned aerial vehicle
Kalman filtering
computationally efficient diagnosis system
active fault diagnosis
artificial excitation system
detekcja uszkodzeń
lokalizacja uszkodzeń
bezzałogowiec
filtracja Kalmana
diagnostyka uszkodzeń
układ wzbudzenia
Opis:
This article presents a single model active fault detection and isolation system (SMAC-FDI) which is designed to efficiently detect and isolate a faulty actuator in a system, such as a small (unmanned) aircraft. This FDI system is based on a single and simple aerodynamic model of an aircraft in order to generate some residuals, as soon as an actuator fault occurs. These residuals are used to trigger an active strategy based on artificial exciting signals that searches within the residuals for the signature of an actuator fault. Fault isolation is carried out through an innovative mechanism that does not use the previous residuals but the actuator control signals directly. In addition, the paper presents a complete parameter-tuning strategy for this FDI system. The novel concepts are backed-up by simulations of a small unmanned aircraft experiencing successive actuator failures. The robustness of the SMAC-FDI method is tested in the presence of model uncertainties, realistic sensor noise and wind gusts. Finally, the paper concludes with a discussion on the computational efficiency of the method and its ability to run on small microcontrollers.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2015, 25, 1; 189-201
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuzzy-Logic Fault Isolation in Large-Scale Systems
Autorzy:
Kościelny, J. M.
Sędziak, D.
Zakroczymski, K.
Powiązania:
https://bibliotekanauki.pl/articles/908284.pdf
Data publikacji:
1999
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
logika rozmyta
wyodrębnianie uszkodzeń
system na wielką skalę
diagnostics
fuzzy logic
fault isolation
large-scale systems
Opis:
Application of fuzzy logic in fault isolation is proposed. The introduced methods assume the industrial requirements such as integration of different detection algorithms, system complexity, data and knowledge uncertainties. Algorithms of decreasing the calculation expenditures for diagnosing large-scale systems are also introduced. An example of the application is also shown. The proposed technique is a development of the Dynamic State Tables method.
Źródło:
International Journal of Applied Mathematics and Computer Science; 1999, 9, 3; 637-652
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonlinear diagnostic filter design: Algebraic and geometric points of view
Autorzy:
Shumsky, A.
Zhirabok, A.
Powiązania:
https://bibliotekanauki.pl/articles/908458.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
filtr diagnostyczny
system nieliniowy
podejście geometryczne
detekcja uszkodzeń
lokalizacja uszkodzeń
diagnostic filter
nonlinear systems
geometric approach
algebraic approach
fault detection
fault isolation
Opis:
The problem of diagnostic filter design is studied. Algebraic and geometric approaches to solving this problem are investigated. Some relations between these approaches are established. New definitions of fault detectability and isolability are formulated. On the basis of these definitions, a procedure for diagnostic filter design is given in both algebraic and geometric terms.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2006, 16, 1; 115-127
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A graph theory-based approach to the description of the process and the diagnostic system
Autorzy:
Kościelny, Jan Maciej
Bartyś, Michał
Syfert, Michał
Sztyber, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2124778.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
graph of the process
graph of the diagnostic system
fault detection
fault isolation
qualitative model
limitations of diagnostic approaches
wykres procesu
system diagnostyczny
wykrywanie uszkodzeń
izolacja uszkodzeń
model jakościowy
Opis:
The paper proposes an original, comprehensive, and methodically consistent graph theory-based approach to the description of the diagnosed process and the diagnosing system. The main baseline of the presented approach is in the dichotomous approach to diagnosing. It involves a separate description of both the process and the diagnostic system. This approach reflects the practice of designing implementable diagnostic systems. Thus, it can be seen as a proposal of a new, alternative, and, at the same time, flexible design procedure with great potential for applications. The primary motivation behind it was an attempt to circumvent the numerous limitations of well-known and well-established diagnosis approaches proposed by the communities working on fault detection and isolation (FDI) and artificial intelligence theories for diagnosis (DX). Accordingly, the paper identifies and provides an extensive discussion and a critical analysis of the existing limitations. Numerous examples and references to practical applications of the approach are indicated.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2022, 32, 2; 213--227
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method for Multiple Fault Isolation and Identification
Metoda lokalizacji i identyfikacji uszkodzeń wielokrotnych
Autorzy:
Kościelny, J. M.
Gozdek, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/154444.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
lokalizacja i identyfikacja uszkodzeń
trójwartościowa ocena residuów
system diagnostyczny
fault detection and isolation
three-value evaluation of the residuals
diagnostic system
Opis:
The paper presents a new method for the multiple fault identification in complex installations. Current state of investigations and the necessity for the multiple fault isolation in the diagnostics of industrial processes were shortly characterised. A simple isolation algorithm was given that assumes the three-value evaluation of residuals. Fault identification is conducted on the grounds of equations of residuals that take effects of faults into account. It was shown that if the number of possible faults indicated during the isolation does not exceed the number of primary residuals, values of which do not stray from zero then the identification is possible. Two fault identification examples in a tank set are presented.
Przedstawiono nowa metodę identyfikacji uszkodzeń wielokrotnych w obiektach złożonych. Krótko scharakteryzowano stan badań i potrzebę rozpoznawania uszkodzeń wielokrotnych w diagnostyce procesów przemysłowych. Podano prosty algorytm lokalizacji uszkodzeń, zakładający trójwartościową ocenę residuów. Identyfikacja uszkodzeń prowadzona jest na podstawie równań residuów uwzględniających wpływ uszkodzeń. Pokazano, że jeśli liczba wskazanych przy lokalizacji możliwych uszkodzeń jest nie większa niż liczba residuów pierwotnych, których wartości odbiegają od zera, to identyfikacja jest możliwa. Przedstawiono dwa przykłady identyfikacji uszkodzeń w zespole zbiorników.
Źródło:
Pomiary Automatyka Kontrola; 2009, R. 55, nr 3, 3; 144-148
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
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