Wyniki wyszukiwania - BazTech

1

Application of semi-Markov's process for control of availability of executive subsystem with a threshold structure

Migawa K.

Journal of Polish CIMAC

|

2012

|

Vol. 7, no 2

131-138

EN

The article presents the method for control of availability of executive subsystem with the threshold structure, consisting of elementary subsystems of the type . The whole of the consideration was presented using the example of a chosen authentic system of the operation and maintenance of transport means. The basic objective of the operation of transport systems is fulfilling the transportation needs as a result of the carrying out of transport on particular routes. The effectiveness of the operation of transport system depends on the possibility of correct carrying out of the assigned transport task. 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. The presented method consists of determining and comparison of the values of the required and actual availability of the executive subsystem. The article deals with the way of determining the required availability of an individual technical object (means of transport) as well as the required number of technical objects used in the system, in order for the obtained value of the availability of the executive subsystem to exceed the value of the required availability determined by the parameters of transport task. The availability of the individual technical object was defined on the basis of a constructed mathematical model of operation and maintenance process realized in the tested transport 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.

2

The method of defining the number of substitute objects on the basis of utilization system availability

Woropay M., Migawa K.

Zeszyty Naukowe / Akademia Morska w Szczecinie

|

2010

|

nr 24 (96)

148-153

EN

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.

PL

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.

3

The method of evaluation of the availability of the transport system for the realization of the assigned transport task

Woropay M., Migawa K., Bojar P.

Journal of KONES

|

2010

|

Vol. 17, No. 3

505-512

EN

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.