Temat: diesel engine diagnostic

Skocz do pozycji: 1.

Tytuł:: Stan diagnostyki technicznej okrętowych silników tłokowych
The status of the marine diesel engines technical diagnostic
Autorzy:: Witkowski, K.
Tematy:: diagnostyka eksploatacyjna
silniki okrętowe
diagnozowanie silników
operation diagnostic
marine diesel engine
diesel engine diagnostic; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Powiązania:: https://bibliotekanauki.pl/articles/328463.pdf Link otwiera się w nowym oknie
Opis:: W artykule przedstawiono okrętowy silnik tłokowy jako złożony obiekt diagnostyki. Podzielono go na układy funkcjonalne. Taka dekompozycja obiektu pozwala rozwiązywać zadania diagnostyczne w strukturach zdecentralizowanych. Omówiono możliwości diagnozowania silników okrętowych w warunkach eksploatacyjnych. Przedstawiono szereg przykładów wdrożonych do eksploatacji systemów diagnostycznych.
In his paper a marine diesel engine Has been described as a complex technical object. Divided into functional blocks. Such decomposition allows to solve diagnostic problems in decentralized structures. Also the possibilities of marine engine diagnostic have been described with a series of examples of systems already in use.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Multiresolution analysis of vibration signals acquired from locomotive Diesel engine for classification of engine states basing on signal statistical parameters
Autorzy:: Boguś, P.
Cieszyński, M.
Merkisz, J.
Tematy:: vibration signals
Diesel engine diagnostic
multiresolution analysis
classification
sygnały drganiowe
silnik spalinowy
analiza wielorozdzielcza
klasyfikacja; Pokaż więcej
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Powiązania:: https://bibliotekanauki.pl/articles/134120.pdf Link otwiera się w nowym oknie
Opis:: The paper presents a method of classification of locomotive Diesel engine states basing on vibration signals taken from an engine body and using chosen statistical parameters calculated for the original signal and it wavelet multiresolution components. The researches presented in the paper concern estimation of an engine states before and after a general repair. The target application of the presented researches is an on-line diagnostic system which can complement standard OBD systems. To this purpose the applied methods should not base on complex analysis of some spectral, time-frequency or scalogram plots but rather on choosing single diagnostic parameters which are suitable for the fast on-line diagnostic. The results have showed the significant difference in distinguishing of engine work before and after a general repair using some chosen statistical parameters applied to vibration signals.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Analysis of vibration signals using short-time analysis and clustering in parameter space for detection of combustion engine state
Autorzy:: Boguś, Piotr
Merkisz, Jerzy
Tematy:: vibration signals
Diesel engine diagnostic
short-time analysis
clustering
sygnały drganiowe
diagnostyka silników wysokoprężnych
analiza krótkoczasowa
klasteryzacja; Pokaż więcej
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Powiązania:: https://bibliotekanauki.pl/articles/134160.pdf Link otwiera się w nowym oknie
Opis:: The paper presents a short-time analysis of the vibration signals for the diagnosis of Diesel engine of combustion locomotive by recognition of different engine states using the clustering technique. The main aim of the researches was to distinguish between different engine states represent different wear extends. The proposed method of vibration signal analysis consists on sliding a time window along signal in time and observing the changes of some given statistical parameters. The set of this parameter values creates a multidimensional parameter space where the time evolution can be observed. For recognition and detection of different engine system states some clustering techniques in the parameter space were performed. The results show the possibility of distinguishing different cluster centers within the parameter space which can be assigning to different engine states represented the states before and after a general repair.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Ranking of toxic compound concentrations as diagnostic parameetrs of marine internal combustion engine
Autorzy:: Zadrąg, R.
Kniaziewicz, T.
Tematy:: diagnostic model
Diesel engine
exhaust components
ranking of parameters; Pokaż więcej
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:: https://bibliotekanauki.pl/articles/259107.pdf Link otwiera się w nowym oknie
Opis:: Changing selected engine structure parameters, especially fuel system parameters, affects the emission of harmful compounds in the exhaust gas. Changes in harmful compound emission are frequently ambiguous, as they highly depend on parameters controlling the combustion process. An additional problem is that simple interactions are frequently accompanied with mutual influence of these parameters. Therefore, we can say about different sensitivity of diagnostic parameters to the same excitations coming from the engine structure but executed at different loading states. When the set of diagnostic parameters is numerous and the values of these parameters are similar, there is a real problem with their correct classification, frequently based on subjective assessment by the analyst. In the article, the authors propose a methodology to classify the recorded diagnostic parameters. In earlier works by the authors [4,6,7], the information capacity index method (the Hellwig method) was proposed as the measure of diagnostic parameter sensitivity. Based on this method, a rankling of diagnostic parameters can be created which divides the set of diagnostic variables into stimulators and destimulators. Novel authors’ approach to the presented problem consists in including nominants, i.e. variables with the most favourable value for the analysed aspect of the research, in the set of diagnostic variables. This normalisation of the set is believed to be helpful for making a diagnostic decision free from analyst’s arbitrariness. The zero unitarization method can also be helpful in creating diagnostic tests.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Knowledge management system for marine diesel engine diagnosis
Autorzy:: Charchalis, A.
Pawletko, R.
Tematy:: knowledge management system
diagnostic expert system
marine diesel engine diagnosis; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/242163.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the conception of knowledge management system for a diagnostic expert system. Development of knowledge management system is necessary during the construction of the expert system. The most important reason is that knowledge in this system is not a static whole, but is subject to dynamic growth, is modified and updated. Advantages afforded by the creation of diagnostic systems based on knowledge, such as expert systems, compared to traditional diagnostic systems based on closed algorithms were characterized. The conception of knowledge management system established in the diagnostic work associated with the development of expert system for marine diesel engine diagnosis. The main elements of the developed management system are: dictionary editor, rule editor, knowledge assessment module and import and export module. Knowledge management system is also equipped with an electronic form that is used to obtain knowledge from experts, specialists in diesel engines operation. The article presents the tasks and the performance of individual components of the system. The knowledge management system enables integration within a single frame of both information collected from experts and automatically collected one. A doubtless advantage of expert system is the opportunity of updating and developing the content recorded in the database. Due to this feature, the effectiveness of the system may grow during engine operation and facilitate gaining new experience.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Wykorzystanie sieci neuronowej do diagnozowania wybranych niesprawności silnika okrętowego
The neural networks application in the marine diesel engine diagnostics
Autorzy:: Pawletko, R.
Tematy:: diagnostyka
silnik spalinowy
sieć neuronowa
diagnostic
diesel engine
neural networks; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Powiązania:: https://bibliotekanauki.pl/articles/328231.pdf Link otwiera się w nowym oknie
Opis:: Tematem publikacji jest próba określenia przydatności sieci neuronowych do diagnozowania wybranych niesprawności silnika okrętowego. Weryfikację doświadczalną zaproponowanego algorytmu diagnostycznego przeprowadzono na symulatorze Turbo Diesel 2.0, zainstalowanym w Katedrze Siłowni Okrętowych Akademii Morskiej w Gdyni.
The paper presents the new possibilities offered by neural networks when applied to the diesel engine diagnostics. The experience data has been collected during the test at the Turbo Diesel 2.0 diagnostic simulator, which has been installed in the Gdynia Maritime Academy. The proposed of the neural networks practical implementation has been include.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Diagnostic and measurement system dedicated for marine engines exploitatory attributes evaluation
Autorzy:: Charchalis, A.
Tematy:: diesel engines
marine engines
engine diagnostic
exploitatory attributes evaluation
pressure sensors; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/248147.pdf Link otwiera się w nowym oknie
Opis:: Modern way of machines' exploitation, due to their high level of constructional complication, requires certain level of supervising. That supervising is generally reduced to detection of pre-failure states and evaluation of machines’ single elements or components condition. In the frame of development of the research capacity of the Mechanical Faculty of Maritime Academy in Gdynia, has been developed the Exploitation Decision Aid System for marine engines exploitation, based on existing test bed with the marine diesel engine Sulzer AL 25/30. Modernization of the engine, significantly extended research and measurement capacity, what has resulted with improvement of quality, extension of the span, and acceleration of carried out research and development works in the domain of safety of exploitation and diagnostics of marine power plants. Above stated investments enables also an extension of the range of research and expertise related to engines' failures and exhaust gases emission pollution, in relation to broad spectrum of implemented fuels. The goal has been achieved in the way of the test equipment modernization including: effective pressure sensors, high pressure fuel sensors, monitoring and visualization of the engine systems' parameters, electronic indictors adopted to continuous operation at all cylinders in the same time, and high class decision aid computer equipment.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The increase of operational safety of ships by improving diagnostic methods for marine diesel engine
Autorzy:: Witkowski, K.
Tematy:: diagnostic methods
marine diesel engine
main engine
ship propulsion
operational safety
injection system
damage
fuel oil; Pokaż więcej
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Powiązania:: https://bibliotekanauki.pl/articles/117520.pdf Link otwiera się w nowym oknie
Opis:: This article shows the importance of the diagnostic improvement methods of marine engines to boost the economy and safety of operation of marine cargo ships. The need to implement effective diagnostic methods is justified by presenting statistical data of marine diesel engines failure and the cost of their operation. Based on the own research has been proven, for the chosen example, that indicator diagrams and analysis of indicated parameters have limited utility in the diagnosis of damages of marine engine, although this is a method commonly used in operational practice. To achieve greater diagnostic effectiveness, when, based on indicator diagrams, are calculated and then the characteristics of heat release is analyzed - net of heat release characteristics and the intensity of the heat release, it was demonstrated. This procedure is particularly effective in the diagnosis of damage of injection system components marine diesel engine.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Possibility of obtaining diagnostic information about the ships engine fuel injection system condition based on the analysis of characteristics of heat release
Autorzy:: Witkowski, Kazimierz
Tematy:: marine diesel engine
indicated parameters
indicator diagram
heat release characteristics
injection system
diagnostic; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/248068.pdf Link otwiera się w nowym oknie
Opis:: Marine engines are very complex technical objects, having many important functional systems, which include, inter alia, injection system, characterized by high unreliability. In this system, there may be different types of defects (damage) that affect the engine parameters, including specific fuel consumption, as well as failures endanger the safety of the ship. The indicator diagrams and analysis of indicated parameters have limited utility in the diagnosis of damages of marine engine, although this is a method commonly used in operational practice. To achieve greater diagnostic effectiveness, when, based on indicator diagrams, are calculated and then the characteristics of heat release is analysed - net of heat release characteristics and the intensity of the heat release, it was demonstrated. This procedure is particularly effective in the diagnosis of damages of marine diesel engine injection system components. It has been shown that the characteristics of heat release contain information about the condition of the injection systems, which enable to diagnose their failures. This is shown on the example of a clogged nozzle holes (their carbonizations). The obtained results allowed selecting the diagnosis symptoms, useful in detecting these faults in the injection system, from the characteristics of heat release: net heat release (Q) and intensity of heat release (q). The object of the research was typical marine medium speed engine Sulzer A25/30.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: The identification of toxic compound emission sensitivity as a diagnostic parameter during dynamic processes of the marine engine
Autorzy:: Zadrąg, R.
Kniaziewicz, T.
Tematy:: diagnostic
theory of experiments
marine diesel engine
exhaust gas toxicity
multi-equation models; Pokaż więcej
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:: https://bibliotekanauki.pl/articles/2073657.pdf Link otwiera się w nowym oknie
Opis:: Changing some parameters of the engine structure alters the emission of harmful components in the exhaust gas. This applies in particular to the damage of charge exchange system as well as fuel system and engine supercharger. These changes are much greater during the dynamic states and their accompanying transitional processes. The different sensitivity of diagnostic parameters to the same force, coming from the engine structure, but realized in other loading conditions can be discussed. Presented in the paper is a model of the engine diagnostic, in which symptoms are indicators of diagnostic and emission characteristics of gaseous exhaust components. For the purpose of the paper the parameters were taken as the dominant structure in the change of fuel injection timing. The diagnostic engine model, based on the theory of multi-equation models, was supplemented by the results of the tests on the single-cylinder research engine ZS. Also proposed is a measure of the sensitivity of the diagnostic parameter during dynamic processes. The following paper is building on the problem previously published by the authors in [X].
Dostawca treści:: Biblioteka Nauki

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