Temat: markov model - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Method for assessment of risks connected with technical object functioning on the basis of Markov model of operation process
Autorzy:: Woropay, M.
Migawa, K.
Bojar, P.
Szubartowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/247063.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport system
operation process
Markov model
risk
Opis:: In the article, a method for assessment of risks connected with a technical object functioning has been studied, in a selected operating system. An urban system of bus transportation, in a selected urban complex, has been chosen as the research object. Functioning of each technical object operating system, including transportation systems, is dependent on its possibility to perform properly the assigned transport task. One of the methods for assessment of the transportation system ability to accomplish the assigned transport task in a proper way is determination of the transport means operation risk. The presented approach involves determination of indexes defining the risks connected with functioning of one technical object (transport means) in an executive subsystem. Indexes of the risk connected with functioning of a single technical object have been determined on the basis of a mathematical model of the operation process, in the studied transportation system. On the basis of the identification of the authentic transport system and the means of transport operation process carried out in it, crucial operational states were designed as well as the possibilities of transferring between the particular states. Based on that, an event-centered model of the use of the means of transport was built, followed by a mathematical model of that process. A Mathematical model of the operation process has been developed with acceptance of an assumption that the process model is to be represented by a homogeneous Markov model X(t). In this paper, the transport means operation risk is determined as a product of probability (or sum of probabilities) of its being in an undesirable state (states) of the Markov model of transport means operation process and the size of the damage in effect of being in the state (states). The size of the suffered damage is measured by a product of time and unit cost whose quantities are connected with being in the operation process undesirable state or states. Assessment of risk connected with technical objects operation and maintenance can be the point of reference to formulate design requirements concerning durability and reliability of the operated objects (transport means) as well as assumptions concerning design or modernization of the technical means necessary for assurance of the vehicle availability in a given transport system.
Źródło:: Journal of KONES; 2011, 18, 4; 563-569
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Initial model of transport means availability of real city transport system
Autorzy:: Woropay, M.
Migawa, K.
Bojar, P.
Powiązania:: https://bibliotekanauki.pl/articles/242151.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: city transport system
Markov's model
technical object
Opis:: The article presents a determination method of transport means service ability in a real city transport system. The considerations have been demonstrated on the basis of a real city bus transport system in a chosen agglomeration. The executive subsystem consisting of elementary subsystems of the type human - technical object (operator - transport means) whose service ability and reliability have a direct influence on capability to perform the transport task is directly responsible for accomplishment of the city transport system tasks. In order to develop a model of means of transport serviceability there were determined significant states of the operational use process and there was made a division and reduction of the number of states in terms of the availability criterion. On this basis, an event model of the process of transport means operational use, and then a mathematical model of this process, were built with the assumption that its model is a homogenous Markov 's process X(t). Next, boundary values of availability coefficient for the distinguished availability levels of transport means used in the city transport system were determined for operational data obtained from a real city bus transport system. The discussed model for determination of transport means availability is an initial one, developed on the basis of a nine-state model of operational use. In further part of the paper, there will be developed a resultant model of transport means availability determination (semi-Markov 's sixteen-state model), being a component of a wider, decision model for creation and assessment of transport means availability.
Źródło:: Journal of KONES; 2009, 16, 2; 495-502
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Method for assessment of transport means failures repairs
Autorzy:: Muślewski, Ł.
Woropay, M.
Neubauer, A.
Szubartowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/246101.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport system
operation process
semi-Markov model
efficiency
Opis:: An analysis of experimental tests and a literature survey of the issue revealed that the problems connected with assessment of costs and effectiveness of transport means repairs has a significant influence on their operation efficiency. Operating factors affecting the elements of technical objects cause negative changes in their features resulting in failures. The failures are referred to as events which significantly impair the vehicle operation efficiency, safety and reliability. On the basis of experimental tests concerning times of failures occurrence, it was found that the set of failures can be divided into subsets of primary and secondary failures. The tests results revealed that the most frequent cause of secondary failures occurrence was improperly performed primary repairs. Primary failures are not related to each other and they appear randomly. However, secondary failures are related to each other as their occurrence is conditioned by the primary failure and results from an inappropriate performance of the successive secondary failure. Basing on an analysis of the author 's own tests results, it was established that failures of transport means used in real transport systems are the effect of impact of various forcing factors. Some failures result from the natural wear of machine elements, whereas, other failures can be caused by inappropriate repair of the previous damage. Thus, there occur the so called secondary failures in a short period of time. In connection with this, high efficiency of the repair performance is of primary importance as it largely affects efficiency of transport tasks accomplishment. In this article, there has been discussed a method developed for assessment of repair costs connected with elimination of secondary failures and its influence on the studied transport system operation efficiency. Familiarity with available technologies for repairs of primary failures as well as with costs of work and costs connected with technical equipment of the repair stations enables specification of the lowest costs necessary for reduction of the number of secondary failures and the average time of their repairs.
Źródło:: Journal of KONES; 2011, 18, 3; 299-307
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Availability of a technical object determined in a finite time interval
Autorzy:: Woropay, M.
Migawa, K.
Bojar, P.
Szubartowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/247070.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport system
operation process
semi-Markov model
availability
Opis:: In the article, a method for determination of the technical object availability, GO (r) in a finite time interval x, defined by the time of the transport task duration, has been discussed. All of the study has been presented on the example of a selected system of technical object operation - a system of transport means operation, in a big urban complex (more than 400 thousand inhabitants). Direct performance of the transport tasks in the analyzed system is the responsibility of an executive system consisting of elementary subsystems of the type operator- transport means. Availability of transport means elementary subsystems is crucial for efficient accomplishment of transport tasks. The presented method involves determination of the technical object availability, on the basis of a mathematical model of the operation process which takes place in the studied system, taking into consideration the technical object reliability characteristics. For this purpose, significant states of the transport means operation have been determined and they have been classified in terms of the availability criterion. Basing on this, an event and mathematical models of transport means operation process have been developed, with the semi Markov homogenous model serving as a mathematical model of the studied operation process. Also, values of the analyzed characteristics have been determined.
Źródło:: Journal of KONES; 2011, 18, 4; 555-562
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Markovs model of means of transport operation and maintenance in a city transport system
Autorzy:: Woropay, M.
Migawa, K.
Wdzięczny, A.
Powiązania:: https://bibliotekanauki.pl/articles/245783.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: city transport system
operation and maintenance process
Markov's model
Opis:: The paper deals with an analysis and mathematical model of means of transport operation and maintenance. The considerations are based on a selected real transport means system - city bus transport system in a chosen agglomeration. The model has been built on the basis of a real city transport system involving realization of the process of operation and maintenance of means of transport. For this purpose, the process significant states and possible transitions between theses states have been determined. On this basis, an event model of means of transport operational use process was built, and next its mathematical model was made, with the assumption of its being the homogenous Markov 's model. Means of transport values of boundary probabilities for their being in the process particular states, were determined for data concerning their operational use. This serves as the basis for an analysis of the studied process of operational use. The presented Markov's model of the means of transport operational use process is the effect of accomplishmen of the first stage of the resultant model (semi-Markov's model) of operational use. The resultant model will be a part of a wide scale, decision model for creation and assessment of the transport system being ready for operation.
Źródło:: Journal of KONES; 2009, 16, 3; 511-516
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Giving prognosis for the chosen features of the operation and maintenance system based on model investigations
Autorzy:: Woropay, M.
Landowski, B.
Powiązania:: https://bibliotekanauki.pl/articles/245348.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: Perczyński, D.
Markov's model
maintenance process
forecasting
urban public
Opis:: The paper deals with the chosen issues related to modelling, giving prognosis and controlling maintenance process of a certain class of the technical objects being realized in a complex maintenance system. Supporting a decision maker in the decision making process related to the analysed maintenance system is to forecast behaviour of the maintenance system and evaluate influence of the chosen decision making variants on the maintenance process course. The object of the investigation, being the basis to illustrate the considerations presented herein, is an urban bus maintenance system in a selected urban agglomeration. The purpose of the paper is to present a possibility to use the Markov 's model of the technical object maintenance process to preliminarily forecast the maintenance system state after changing the model input parameter values. The change of the model input parameter values may simulate influence of the internal and external factors on the system behaviour. The presented method to model and forecast a maintenance system due to the assumed generalization degree of the description and the system approach to the problem may be used to forecast and analyse a maintenance process being carried out in other maintenance systems than the one in an urban bus transport system.
Źródło:: Journal of KONES; 2009, 16, 4; 513-520
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Markov model of the serviceability assurance process within an autonomous system
Markowski model procesu zapewniania zdatności w systemie autonomicznym
Autorzy:: Woropay, M.
Migawa, K.
Powiązania:: https://bibliotekanauki.pl/articles/263319.pdf
Data publikacji:: 2007
Wydawca:: Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:: model Markowa
model matematyczny
system transportowy
Markov model
mathematical model
transport system
Opis:: This paper presents a mathematical model of the serviceability assurance process of the technical objects within an autonomous system. The mathematical model of the process under investigation was built assuming that its model is the homogeneous Markov process X(t). All the investigations were presented based on a selected real operation and maintenance system of the means of transport. The controlled process under investigation was identified and analysed on such basis.
W artykule przedstawiono matematyczny model procesu zapewniania zdatności obiektów technicznych w systemie autonomicznym. Model matematyczny badanego procesu został zbudowany przy założeniu, że jego modelem jest jednorodny proces Markowa X(t). Całość rozważań przedstawiono na przykładzie wybranego rzeczywistego systemu eksploatacji środków transportu. Na tej podstawie dokonano identyfikacji i analizy rozpatrywanego procesu sterowanego.
Źródło:: Archiwum Motoryzacji; 2007, 4; 321-329
1234-754X
2084-476X
Pojawia się w:: Archiwum Motoryzacji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Prognozowanie stanu systemu na podstawie badań modelu procesu eksploatacji
The state condition prognosis based on the investigation of the maintenance process model
Autorzy:: Landowski, B.
Woropay, M.
Perczyński, D.
Powiązania:: https://bibliotekanauki.pl/articles/328622.pdf
Data publikacji:: 2004
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: model Markowa
proces eksploatacji
prognozowanie
komunikacja miejska
Markov model
maintenance process
forecasting
urban transport
Opis:: Referat dotyczy wybranych zagadnień związanych z modelowaniem, prognozowaniem i sterowaniem procesem eksploatacji pewnej klasy obiektów technicznych realizowanym w złożonym systemie eksploatacji. Wspomaganie decydenta w procesie podejmowania decyzji dotyczących analizowanego systemu eksploatacji polega na prognozowaniu zachowania się systemu eksploatacji oraz ocenie wpływu wybranych wariantów decyzyjnych na przebieg procesu eksploatacji. Celem opracowania jest przedstawienie możliwości wykorzystania markowskiego modelu procesu eksploatacji obiektów technicznych do wstępnego prognozowania stanu systemu eksploatacji po zmianie wartości parametrów wejściowych modelu. Zmiana wartości parametrów wejściowych modelu może symulować oddziaływanie czynników wewnętrznych i zewnętrznych na zachowanie się systemu.
The paper presents the selected issues related to modelling, forecasting and controlling the maintenance process of a technical object class being realised in a complex maintenance system. Assisting the decision-maker in the decision-making process regarding the analysed maintenance system is based on forecasting the maintenance system behaviour and on estimation of the selected decision-making variant on the maintenance process course. The purpose of the paper is to present the possibility to use Markov technical object maintenance process model for preliminary forecasting the maintenance system state upon change of the model input parameter values. The change of the model input parameter values may simulate impact of the internal and external factors on the system behaviours.
Źródło:: Diagnostyka; 2004, 32; 101-106
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: The method of defining the number of substitute objects on the basis of utilization system availability
Metoda wyznaczania liczby obiektów rezerwowych na podstawie gotowości podsystemu wykonawczego
Autorzy:: Woropay, M.
Migawa, K.
Powiązania:: https://bibliotekanauki.pl/articles/359616.pdf
Data publikacji:: 2010
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: system transportowy
struktura progowa
proces eksploatacji
model Markowa
transport system
threshold structure
operation process
Markov model
Opis:: The article presents a method of defining the required number of substitute technological objects used in the transport system, necessary for correct carrying out of the assigned transport task. The whole of the consideration was presented using the example of a chosen authentic system of the operation of transport means. On the basis of the identification of the authentic transport system and the means of transport operation process carried out in it, crucial operational states were designed as well as the possibilities of transferring between the particular states. Based on that, an event-centered model of the use of the means of transport was built, followed by a mathematical model of that process, assuming that its model is the homogenous Markov process. Then, for operational data obtained from research conducted in the authentic transport system, the values of the analyzed characteristics were defined. The presented results are a result of the research conducted as a part of a larger research project pertaining to the construction of a decision-making model of controlling transport system availability.
W artykule przedstawiono sposób wyznaczania wymaganej liczby technicznych obiektów rezerwowych, eksploatowanych w systemie transportowym, koniecznych do prawidłowej realizacji przydzielonego zadania przewozowego. Całość rozważań przedstawiono na przykładzie wybranego rzeczywistego systemu eksploatacji środków transportu. Na podstawie identyfikacji rzeczywistego systemu transportowego i realizowanego w nim procesu eksploatacji środków transportu wyznaczono istotne stany eksploatacyjne oraz możliwe przejścia między wyróżnionymi stanami. Na tej podstawie zbudowano zdarzeniowy model procesu eksploatacji środków transportu, a następnie matematyczny model tego procesu, zakładając, że jego modelem jest jednorodny proces Markowa. Następnie dla danych eksploatacyjnych, uzyskanych z badań przeprowadzonych w rzeczywistym systemie transportowym, wyznaczono wartości analizowanych charakterystyk. Prezentowane wyniki są efektem prac realizowanych w ramach szerszego projektu badawczego, dotyczącego budowy decyzyjnego modelu sterowania gotowością systemu transportowego.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2010, 24 (96); 148-153
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Analysis of the change of qualitative states of transportation system operation
Autorzy:: Muślewski, Ł
Knopik, L.
Woropay, M.
Powiązania:: https://bibliotekanauki.pl/articles/247633.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
system operation quality
model
Markov chain
semi-Markov process
expected coast
Opis:: This paper deals with the problems connected with evaluation of a technical system and its being later used for decision making in order to provide complex technical systems with appropriate operation quality. The research object is a real municipal transportation system. The assessment quality of the systems operation is based on the changes of the systems features values. The features describe the operation of the systems operators, controlled technical objects and the environment influence. The assessment and the support the demand quality of the systems operation from the safety, efficiency, economic and reliability point of view is the basic factor of the executed exploitation process. The notion of a system operation quality has been defined, a scheme of an assessment model has been presented and a random process, providing the basis for evaluation of a technical system, has been developed. On the basis of carried out experimental tests there have been distinguished four states of a system operation quality reflecting intervals of values of grades that were characteristic for given time moments. A model of system operation qualitative state changes, based on Markov chain, has been considered in this paper. A system of equations has been determined for a distinguished Markov chain on the basis of which a mathematical model for assessment and control of selected types of transportation systems will be developed.
Źródło:: Journal of KONES; 2014, 21, 3; 251-257
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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