Wszystkie pola: availability - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Method for assessment and control of availability of executive subsystem of a transportation system
Autorzy:: Woropay, M.
Migawa, K.
Powiązania:: https://bibliotekanauki.pl/articles/246869.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport system
availability
operation and maintenance process
Opis:: In this work, a method for assessment and control of availability of executive subsystem consisting of elementary subsystems of the type has been presented. The goal of the executive subsystem is to perform the assigned transport tasks over set routes, with a given frequency, according to a set schedule. A proper accomplishment of the transport task is possible only if the required number of technical objects (transport means) is prepared to perform the assigned task in a given time. Among many significant criteria used for assessment of a transport system operation there is one of special importance that is availability of the executive subsystem to perform the assigned tasks. Availability of the executive system to perform the assigned tasks depends on availability of particular technical objects (transport means) used in the system of transportation and their number. On the basis of the above statement, it can be said that control of the executive subsystem availability can be carried out both by selecting technical objects with the required availability and matching the required number of the objects which are to be used in the system in order to ensure proper accomplishment of the transport tasks. In this work there has been discussed a method for determination of the required availability of a single object as well as the required number of technical objects indispensable to perform appropriately the assigned transport task, on the basis of the transportation system availability assessment. Availability of the transportation system is determined on the basis of a mathematical model of the operation and maintenance process of technical objects, in the studied transportation system. Exemplary results have been presented on the basis of experimental data, obtained from the tests carried out in a real operation and maintenance system of transport means.
Źródło:: Journal of KONES; 2012, 19, 3; 491-498
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

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: 3.

Tytuł:: The method of evaluation of the availability of the transport system for the realization of the assigned transport task
Autorzy:: Woropay, M.
Migawa, K.
Bojar, P.
Powiązania:: https://bibliotekanauki.pl/articles/247624.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport system
technological availability
threshold structure
semi-Markovian model
Opis:: The article presents the method of evaluation of the availability of the utilization subsystem in a transport system. The method includes the defining and comparison of the values of the availability of the utilization subsystem to the value of the required availability. The article also deals with the way of defining the minimum availability of an individual technological object (means of transport) as well as the minimum number of technological objects used in the system, in order for the obtained value of the availability of the utilization subsystem to exceed the value of the required availability determined by the parameters of transport task. The values of the availability of the utilization subsystem are defined according to the availability of an individual technological object, the number of objects used in the system as well as the structure by which the individual technological objects are linked. The availability of the individual technological object was defined on the basis of a constructed mathematical model of the utilization process realized in the tested transport system. Then, for the utilization data obtained during tests conducted in an existing transport system, the values of the analyzed characteristics were defined. The presented results are the effect of research conducted as part o f a larger research project pertaining to the creation o f a decision-making model of controlling the availability of a transport system.
Źródło:: Journal of KONES; 2010, 17, 3; 505-512
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Method of availability control of the transport means
Autorzy:: Woropay, M.
Migawa, K.
Neubauer, A.
Powiązania:: https://bibliotekanauki.pl/articles/247367.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: semi-Markov processes
control decisions
genetic algorithm
Opis:: The problems presented in this article deal with operation and maintenance process control in complex systems of technical object operation and maintenance. The article presents the description of the method concerning the control availability for technical objects (means of transport) on the basis of the mathematical model of the operation and maintenance process with the implementation of the decisive processes by semi-Markov. The presented method means focused on the preparing the decisive for the operation and maintenance process for technical objects (semi-Markov model) and after that specifying the best control strategy (optimal strategy) from among possible decisive variants in accordance with the approved criterion (criteria) of the activity evaluation of the system of technical objects operation and maintenance. In the presented method specifying the optimal strategy for control availability in the technical objects means a choice of a sequence of control decisions made in individual states of modelled operation and maintenance process for which the function being a criterion of evaluation reaches the extreme value. In order to choose the optimal control strategy the implementation of the genetic algorithm was chosen. Depending on one’s needs, the genetic algorithm including the obtained model of operation and maintenance process may be implemented for mathematic formulation and solution of a wide array of problems connected with control of complex systems of technical object operation and maintenance. It pertains mostly to the economic analysis, safety management and controlling availability and reliability of complex systems. The opinions were presented on the example of the operation and maintenance process of the means of transport implemented in the real system of the bus municipal transport.
Źródło:: Journal of KONES; 2013, 20, 4; 485-492
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

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: 6.

Tytuł:: Evaluation of operational availability of municipal transport system
Autorzy:: Woropay, M.
Bojar, P.
Muślewski, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/949488.pdf
Data publikacji:: 2017
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
road transport
simulation
combustion engines
air pollution
environmental protection
Opis:: The primary subject of research is the procedure leading to safe, efficient, reliable and timely completion of transport tasks. The tasks, assigned to the transport system, are carried out by an operative subsystem, comprised of elementary subsystems of the man – technical object (operator-vehicle) type. The timely and safe completion of the tasks is influenced by the level of availability and reliability of elementary subsystems. Those in control of the process of the use of means of transport (vehicles) should undertake control decisions in such a way that would correctly evaluate the efficiency of process completion. In the area of public transport, technical availability of buses constitutes an important criterion of the evaluation of transport system. As a result, the transport company should provide continuous surveillance of the process of vehicle use in order to achieve running availability of the whole system. The requirements expected from devices and machines used head towards servicing via preventive method taking into account the technical condition of the system. Such an approach is a transformation towards technical system servicing process management. Correct completion of transport tasks is possible when the required traffic safety is met, taking into consideration the technical condition of the means of transport. The municipal transport systems should ensure the quality of the services provided to meet the expectations of the users. In the set of characteristics of the researched transport system, the following ones stand out: regularity, availability, reliability, course frequency, travel comfort, timeliness, speed, service complexity, competitive cost of transport service, and safety.
Źródło:: Journal of KONES; 2017, 24, 4; 355-361
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

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: 8.

Tytuł:: Metoda wyznaczania gotowości systemu transportu miejskiego z uwzględnieniem skuteczności wykonywanych napraw
The method of shaping the availability designed for the transport system on the basis of the effectiveness of performed repairs
Autorzy:: Woropay, M.
Migawa, M.
Powiązania:: https://bibliotekanauki.pl/articles/327986.pdf
Data publikacji:: 2001
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: system transportowy
gotowość
proces Markowa
diagnozowanie
transport miejski
naprawa
transport system
urban bus
repair
effectiveness
diagnostic
Opis:: W pracy przedstawiono metodę wyznaczania gotowości systemu transportowego z wykorzystaniem oceny skuteczności realizowanych napraw na stanowiskach podsystemu utrzymania ruchu. W wyniku identyfikacji procesu eksploatacji realizowanego w rzeczywistym systemie transportu miejskiego został zbudowany zdarzeniowy model tego procesu. Na tej podstawie wyznaczono prawdopodobieństwa graniczne pi* przebywania pojedynczego autobusu w poszczególnych stanach procesu eksploatacji zakładając, że modelem procesu eksploatacji obiektów technicznych (autobusów miejskich) jest jednorodny proces Markowa X(t).
The paper presents the method of shaping the availability of the transport system on the basis of evaluation of the effectiveness of repairs, performed on special stations of the road traffic subsystem. The occurence model was created as the result of identification of the maintenance process, realized in the real urban transport system. Furthermore, all border probabilities pi* of finding the single bus in individual maitenance conditions have been determined, with the general assumption, that the homogeneous Markov's process X(t) is the model of the maintenance process of mentioned technical objects (urban buses).
Źródło:: Diagnostyka; 2001, 25; 30-36
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

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