Skocz do pozycji: 1.

Tytuł:

Modelowanie niezawodności złożonych systemów bioagrotechnicznych
Modelling of reliability of complex bioagrotechnical systems

Autorzy:

Kusz, A.
Marciniak, A.

Powiązania:

https://bibliotekanauki.pl/articles/286916.pdf

Data publikacji:

2010

Wydawca:

Polskie Towarzystwo Inżynierii Rolniczej

Tematy:

system bioagrotechniczny
niezawodność procesu
dynamiczne sieci bayesowskie
bioagrotechnical system
process reliability
dynamic Bayesian networks

Opis:

W artykule omówiono metodę modelowania niezawodności złożonych systemów bioagrotechnicznych. Przedstawiono koncepcję modelu niezawodności procesowej opartą na technologii sieci bayesowskich. Niezawodność procesu zdefiniowano jako miarę probabilistyczną na zbiorze wartości pewnego funkcjonału reprezentującego potencjalny plon i jego ewentualny spadek powodowany zagrożeniami biologicznymi i częściowo kształtowany poprzez warunki klimatyczne i działania interwencyjne. Ewolucję zmian niezawodności procesu odwzorowano korzystając z sieci dynamicznych, które uwzględniają lokalizację w czasie.
The article deals with the method of modelling of reliability of complex bioagrotechnical systems. The concept of the model of process reliability based on the technology of Bayesian networks was presented. The reliability of the process was defined as a probabilistic measure on the set of values of a certain functional representing the potential yield and its possible decrease caused by biological threats and shaped partly by climate conditions and intervention actions. The evolution of changes of reliability of the process was mapped with the use of dynamic networks that take time location into account.

Źródło:

Inżynieria Rolnicza; 2010, R. 14, nr 4, 4; 157-162
1429-7264

Pojawia się w:

Inżynieria Rolnicza

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Generalized piecewise Markov processes

Autorzy:

Kopocińska, I.

Powiązania:

https://bibliotekanauki.pl/articles/748611.pdf

Data publikacji:

1977

Wydawca:

Polskie Towarzystwo Matematyczne

Tematy:

renewal process
Markov process
reliability models

Opis:

Artykuł nie zawiera streszczenia
MR0494551

Źródło:

Mathematica Applicanda; 1977, 5, 9
1730-2668
2299-4009

Pojawia się w:

Mathematica Applicanda

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Testing the integrated package of tools supporting decision making on identification, prediction and optimization of complex technical systems operation, reliability and safety. Part 3. IS&RDSS Application – Exemplary system operation and reliability characteristics prediction

Autorzy:

Kołowrocki, K.
Soszyńska-Budny, J.
Ng, K. M.

Powiązania:

https://bibliotekanauki.pl/articles/2069505.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability
operation process
prediction

Opis:

There is presented the IS&RDSS application to the operation and reliability of an exemplary complex technical system prediction. There are performed, the unconditional mean sojourn times and the limit transient probabilities of the exemplary system operation process at the particular operation states evaluations. The evaluations of the exemplary system unconditional multistate reliability function, the expected values and the standard deviations of its unconditional lifetimes in the reliability state subsets and the mean values of its lifetimes in the particular reliability states are performed as well. Moreover, in the case when the system is repairable, its renewal and availability characteristics are estimated.

Źródło:

Journal of Polish Safety and Reliability Association; 2011, 2, 2; 387--398
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Testing the integrated package of tools supporting decision making on identification, prediction and optimization of complex technical systems operation, reliability and safety. Part 4. IS&RDSS Application – Exemplary system operation and reliability optimization

Autorzy:

Kołowrocki, K.
Soszyńska-Budny, J.
Xie, M.

Powiązania:

https://bibliotekanauki.pl/articles/2069544.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability
operation process
optimization

Opis:

There is presented the IS&RDSS application to the operation and reliability of an exemplary complex technical system optimization. There are determined, the optimal limit transient probabilities of the exemplary system operation process at the particular operation states maximizing the system lifetime in the reliability states not worse than the critical reliability state and its optimal sojourn times at the particular operation states. There are evaluated the exemplary system optimal unconditional multistate reliability function, the optimal expected values and the standard deviations of its unconditional lifetimes in the reliability state subsets and the optimal mean values of its lifetimes in the particular reliability states are. Moreover, in the case when the system is repairable, its optimal renewal and availability characteristics are found.

Źródło:

Journal of Polish Safety and Reliability Association; 2011, 2, 2; 399--406
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Issues on Production Process Reliability Assessment – Review

Autorzy:

Chlebus, M.
Werbińska-Wojciechowska, S.

Powiązania:

https://bibliotekanauki.pl/articles/409248.pdf

Data publikacji:

2016

Wydawca:

Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej

Tematy:

production process
reliability assessment

Opis:

The paper discusses a problem of reliable performance of production processes. Reliability analyses of production systems regard considering many different factors and requirements. As a result, basic definitions connected with production system/process have been defined. Later, there has been also presented the literature review in reliability engineering, what gives the possibility to present a comparison analysis of known reliability models for production systems performance. Based on the presented literature summary, the multidimensional definition of production process reliability is developed with short example of its implementation possibilities. The work ends up with summary and directions for further research.

Źródło:

Research in Logistics & Production; 2016, 6, 6; 481-497
2083-4942
2083-4950

Pojawia się w:

Research in Logistics & Production

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Wpływ robotyzacji na niezawodność procesu produkcyjnego w branży piekarniczej
The influence of robotization on the reliability of the production process in the bakery industry

Autorzy:

Drozd, Radosław

Powiązania:

https://bibliotekanauki.pl/articles/270732.pdf

Data publikacji:

2019

Wydawca:

Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD

Tematy:

niezawodność procesu produkcyjnego
robotyzacja
koncepcja probabilistyczna
reliability of the production process
robotization
probabilistic concept

Opis:

Celem artykułu jest ustalenie wpływu robotyzacji na niezawodność linii produkcyjnej mikro i małych przedsiębiorstw w branży piekarniczej na podstawie badań wykonanych w okresie 2016.01.02-2018.12.31. Autor przedstawił problematykę opomiarowania niezawodności zrobotyzowanego systemu produkcyjnego, wyszczególnił wszystkie maszyny po robotyzacji, oznaczając je odpowiednio w procesie, co było niezbędne do dalszych obliczeń. Następnie zostały przedstawione obliczenia niezawodności wybranego projektu systemu zrobotyzowanego (wersja robocza – TRAY), oparte na koncepcji probabilistycznej. W dalszej części artykułu został zaprezentowany schemat niezawodności zrobotyzowanego procesu produkcyjnego chleba z wykorzystaniem jednej linii WPH1 wraz z końcowymi wynikami, które wykazały, że po wprowadzeniu systemu zrobotyzowanego, niezawodność pracy maszyn na linii produkcyjnej chleba uległa poprawie o 6%.
The purpose of the article is to determine the impact of robotics on the reliability of the production line of micro and small enterprises in the baking industry, based on research carried out in the period 2016.01.02-2018.12.31. The author presented the issues of measuring the reliability of a robotic production system, specified all machines after robotization, marking them appropriately in the process, which was necessary for further calculations. Then, the reliability calculations of the selected robotic system design (working name – TRAY) based on the probabilistic concept were presented. The rest of the article presents a diagram of the reliability of the robotic bread production process using one WPH1 line together with the final results showed that after the introduction of the robotic system, the reliability of machines on the bread production line improved by 6%.

Źródło:

Aparatura Badawcza i Dydaktyczna; 2019, 24, 3; 204-211
2392-1765

Pojawia się w:

Aparatura Badawcza i Dydaktyczna

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 7.

Tytuł:

Influence of the Demand Planning Process on Logistic System Reliability. Case Study

Autorzy:

Szozda, Natalia
Werbińska-Wojciechowska, Sylwia

Powiązania:

https://bibliotekanauki.pl/articles/504072.pdf

Data publikacji:

2011

Wydawca:

Międzynarodowa Wyższa Szkoła Logistyki i Transportu

Tematy:

demand planning process
reliability
logistic system

Opis:

Authors define the main elements affecting the right logistic system performance level and investigate the possible connections between demand process planning quality and logistic system reliability. Thus, known in the literature definitions of logistic system reliability are characterized. Later, an overview of some recent developments in the analyzed research area is provided. In the next point, authors present the main elements affecting the reliable and available logistic system performance. Finally, the paper is ended by the presentation of the obtained analysis results in comparison with the knowledge about the case companies’ present condition.

Źródło:

Logistics and Transport; 2011, 13, 2; 79-92
1734-2015

Pojawia się w:

Logistics and Transport

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Problematics of reliability of road rollers

Autorzy:

Stawowiak, M.
Kuczaj, M.

Powiązania:

https://bibliotekanauki.pl/articles/409921.pdf

Data publikacji:

2018

Wydawca:

STE GROUP

Tematy:

exploitation
reliability
operation process
road roller

Opis:

This article refers to the reliability of road rollers used in a selected roadworks company. Information on the method of road rollers service and how the service affects the reliability of these rollers is presented. Attention was paid to the process of the implemented maintenance plan with regard to the machine's operational time. The reliability of road rollers was analyzed by determining and interpreting readiness coefficients.

Źródło:

Management Systems in Production Engineering; 2018, 2 (26); 124-128
2299-0461

Pojawia się w:

Management Systems in Production Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 9.

Tytuł:

Modelling reliability of water supply network

Autorzy:

Kołowrocki, K.
Tchórzewska-Cieślak, B.
Piegdoń, I.

Powiązania:

https://bibliotekanauki.pl/articles/2069056.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

modelling
water supply
reliability
operation process

Opis:

The operation process of the complex technical system is considered and its operation states are introduced. The semi-Markov process is used to construct a general probabilistic model of the considered complex technical system operation processes. Further, a general reliability analytical model of complex two-state technical systems related to their operation processes is constructed. An exemplary application of this model to a simplified fragment of the main water supply network operating at variable conditions is presented as well.

Źródło:

Journal of Polish Safety and Reliability Association; 2015, 6, 2; 125--134
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 10.

Tytuł:

Monte Carlo method for reliability of parallel system with dependent failures of component

Autorzy:

Grabski, F.

Powiązania:

https://bibliotekanauki.pl/articles/2069174.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability
stochastic process
Weibull distribution
dependency

Opis:

A problem of parallel system reliability with dependent failures of components is presented in the paper. It is assumed that lifetimes of components are independent random variable having Weibull distribution. We take under consideration a parallel (in reliability meaning) system consisting of n independent at the beginning of work and identical components. We assume that a load of the working system affects on the reliability of its components and the load of the system is distributed on all working components. Therefore, a failure rate of each component is changeable during run of the system and depends on a number of working elements at this point in time. As a model of the system failures we construct a stochastic process which value at the moment t denotes the number of working components. Generally it is neither Markov nor semi-Markov process. To assess the reliability characteristics of the system we simulate this stochastic process using the Monte-Carlo method and we calculate values of nonparametric kernel density and reliability functions estimators.

Źródło:

Journal of Polish Safety and Reliability Association; 2016, 7, 1; 67--72
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 11.

Tytuł:

Operational reliability of heat supply systems

Autorzy:

Babiarz, B.

Powiązania:

https://bibliotekanauki.pl/articles/2069555.pdf

Data publikacji:

2008

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability
heat supply system
operation process

Opis:

The paper contains an analysis of the operational process of heat supply system with taking into consideration its reliability. The specific character of the operation of heat-supply systems has been considered in this work. In the process of the exploitation of heat-supply systems there have been distinguished five operational states, assuming as a criterion of the level of indoor temperature decrease in residential rooms. The method of modelling the operational reliability of heat-supply systems is worked out. The methodology of determining the overall index of heat-supply system reliability has been presented. The measure of heat-supply system reliability has been assumed as the scale/quantity of inadequate supply of heat power at a given state. Calculations have been carried out regarding the changeability of exterior conditions for one of the groups of customers – residential users. On the basis of the operational data for the heat supply system with two heat sources shortage quantities of heat power and the probability of their occurrence have been calculated as an application of this methodology.

Źródło:

Journal of Polish Safety and Reliability Association; 2008, 1; 27--31
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 12.

Tytuł:

Enhancing business process event logs with software failure data

Autorzy:

Gruszczyński, K.

Powiązania:

https://bibliotekanauki.pl/articles/411307.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Oddział w Lublinie PAN

Tematy:

business process modeling
exceptional process paths
software reliability
failure classification
process mining

Opis:

Process mining techniques allow for the analysis of the real process flow. This flow might be disturbed for many reasons, including software failures. It is also possible for failure occurrence to be the consequence of the faulty process execution. A method for measuring the harmfulness of the software failure regarding business processes executed by the user would be a valuable asset for quality and reliability improvement. In this paper, we take the first step towards developing this method by providing a tool for enhancing XES event logs with failure data. We begin with an introduction to this topic and background analysis in the field of failure classification and process mining techniques supporting failure analysis. Then we present our method for merging operational and failure data. By carrying out a case study based on real data, we evaluate our tool and present the aim of our future work.

Źródło:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2019, 8, 1; 27-32
2084-5715

Pojawia się w:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 13.

Tytuł:

Reliability and risk improvement with components quantitative and qualitative redundancy of bulk cargo transporter

Autorzy:

Kołowrocki, K.
Kwiatuszewska-Sarnecka, B.
Soszyńska-Budny, J.

Powiązania:

https://bibliotekanauki.pl/articles/2069063.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability function
risk function
operation process
redundancy

Opis:

The joint general model of reliability of complex technical systems at variable operation conditions linking a semi-Markov modelling of the system operation processes with a multi-state approach to system reliability analysis and reliability improvement are applied in maritime transport to reliability and risk optimization of a bulk cargo transportation system.

Źródło:

Journal of Polish Safety and Reliability Association; 2015, 6, 2; 1--12
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 14.

Tytuł:

Reliability assessment of an exemplary system operating at variable conditions

Autorzy:

Kołowrocki, K.
Kuligowska, E.
Soszyńska-Budny, J.

Powiązania:

https://bibliotekanauki.pl/articles/2069201.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

system reliability
system operation process
analytical approach

Opis:

The reliability analysis of a multistate complex system subjected to varying in time its operation process is performed. A semi-Markov process is applied to construct the multistate model of the system operation process and its main characteristics are determined. Analytical linking of the system operation process model with the system multistate reliability model is proposed to get a general reliability model of the complex system operating at varying in time operation conditions and to find its reliability characteristics. The constructed integrated general model of a complex multistate system reliability, linking its reliability model and its operation process model and considering variable at different operation states its reliability structure and its components reliability parameters is applied to the reliability evaluation of an exemplary system.

Źródło:

Journal of Polish Safety and Reliability Association; 2015, 6, 1; 129--137
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Reliability prediction and optimization of complex technical systems with application in port transport

Autorzy:

Kołowrocki, K.
Soszyńska-Budny, J.

Powiązania:

https://bibliotekanauki.pl/articles/2069474.pdf

Data publikacji:

2012

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

complex system
reliability
operation process
prediction
optimization

Opis:

There are presented the methods of the reliability prediction and optimization of complex technical systems related to their operation processes. The general model of the reliability of complex technical systems operating at variable operation conditions linking the semi-Markov modeling of their operation processes with the multistate approach to their reliability analysis and the linear programming are applied in maritime industry to the reliability and risk prediction and optimization of the container gantry crane.

Źródło:

Journal of Polish Safety and Reliability Association; 2012, 3, 2; 263--278
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

The random failure rate

Autorzy:

Grabski, F.

Powiązania:

https://bibliotekanauki.pl/articles/2069577.pdf

Data publikacji:

2007

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability
random failure rate
semi-Markov process

Opis:

A failure rate of the object is assumed to be a stochastic process with nonnegative, right continuous trajectories. A reliability function is defined as an expectation of a function of a random failure rate process. The properties and examples of the reliability function with the random failure rate are presented in the paper. A semi-Markov process as the random failure rate is considered in this paper.

Źródło:

Journal of Polish Safety and Reliability Association; 2007, 1; 143--149
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 17.

Tytuł:

Statistical identification and prediction of the port oil pipeline system’s operation process and its reliability and risk evaluation

Autorzy:

Kołowrocki, K.
Soszyńska, J.

Powiązania:

https://bibliotekanauki.pl/articles/2069675.pdf

Data publikacji:

2009

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

semi-Markov processes
system operations process
reliability

Opis:

In the paper a Semi-markov processes are used to construct a general model of complex industrial systems’ operation processes. Main characteristics of this model are determined as well. In particular case, for a port oil pipeline transportation system, its operation states are defined, the relationships between them are fixed and particular model of its operation process is constructed and its main characteristics are determined. Further, the joint model of the system operation process and the system reliability is defined and applied to the reliability and risk evaluation of the port oil pipeline transportation system.

Źródło:

Journal of Polish Safety and Reliability Association; 2009, 2; 241--250
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 18.

Tytuł:

Reliability, risk and availability based optimization of complex technical systems operation processes. Part 1, Theoretical backgrounds

Autorzy:

Kołowrocki, K.
Soszyńska, J.

Powiązania:

https://bibliotekanauki.pl/articles/2069687.pdf

Data publikacji:

2009

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability
availability
complex system
operation process
optimization

Opis:

A convenient new tool for solving the problem of reliability and availability evaluation and optimization of complex technical systems is presented. Linking a semi-markov modeling of the system operation processes with a multi-state approach to system reliability and availability analysis is proposed to construct the joint general model of reliability and availability of complex technical systems in variable operation conditions. This joint model and a linear programming is proposed to complex technical systems reliability and availability evaluation and optimization respectively.

Źródło:

Journal of Polish Safety and Reliability Association; 2009, 1; 189--196
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 19.

Tytuł:

Process machining allowance for reliability analysis of mechanical parts based on hidden quality loss

Autorzy:

Wang, Jingang
Liu, Xintian
Xu, Wang
Kai, Jin

Powiązania:

https://bibliotekanauki.pl/articles/28086953.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

reliability analysis
Process machining allowance
hidden quality loss
process capability index

Opis:

The machining allowance variation is significant for the reliability of a part during the machining process. Usually, when the machining allowance of a part increases, the machining and production cost also increase. When the machining allowance decreases, the machining surface will have defects. The parts will produce manyscraps andreliability will decrease. The machining allowance of a part consists of multiple process machining allowances. To analyze the impact caused by machining allowance variation, the hidden quality loss and process machining allowance are combined through theprocess capability index (PCI). Then the asymmetric quadratic quality loss function (AQF) and quadratic exponential function (QEF) are used to analyze them. A prediction model of hidden quality loss of process machining allowance is proposed. On the premise that the quality characteristic value obeys normal function distribution, a numerical model is given and used to obtain process machining allowance-inherent reliability of the product. The actual case is used to compare and verify the two models.

Źródło:

Eksploatacja i Niezawodność; 2023, 25, 4; art. no. 171594
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Random Failure Rate

Autorzy:

Grabski, F.

Powiązania:

https://bibliotekanauki.pl/articles/2069123.pdf

Data publikacji:

2012

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability
random failure rate
semi-Markov process
random-walk
Poisson process
Furry-Yule process

Opis:

The reliability function defined by a failure rate which is a stochastic process with nonnegative and right continuous trajectories is presented in this paper. The reliability function with an at most countable state space semi-Markov failure rate process is investigated. A theorem concerning of equations for a conditional reliability function with a semi-Markov process as a failure rate is presented in this paper. The solutions of the proper renewal equations allow getting the reliability functions for the finite space semi-Markov random walk, for the Poisson process and for the Furry-Yule process as a failure rate.

Źródło:

Journal of Polish Safety and Reliability Association; 2012, 3, 2; 209--216
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Monte Carlo simulation for reliability assessment and optimization of an object subjected to varying operation conditions

Autorzy:

Kuligowska, E.

Powiązania:

https://bibliotekanauki.pl/articles/2069153.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

operation process
reliability
prediction
optimization
Monte Carlo simulation

Opis:

This paper presents the computer simulation technique related to the reliability of an object under variable operation conditions. The considered object operation process is modelled using semi-Markov processes and its reliability is analysed by application of the conditional reliability functions in its different operation states. The backgrounds and procedures of the Monte Carlo simulation method application to an object at variable condition reliability analysis are proposed and applied to reliability evaluation of an exemplary object. Consequently, under arbitrarily assumed the parameters of this exemplary object operation process and its conditional reliability functions, using the proposed Monte Carlo simulation procedures, the transient probabilities of the exemplary object operation process at the particular operation states and its unconditional reliability function are determined. Further, the linear programming is introduced and proposed to reliability optimization of an object at variable operation conditions and the optimal transient probabilities of the exemplary object operation process at the particular operation states and its optimal unconditional reliability function are determined. Finally, some practical suggestions on the modification of the exemplary object operation process improving its reliability are proposed.

Źródło:

Journal of Polish Safety and Reliability Association; 2013, 4, 2; 205--218
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Application of perturbed semi-Markov processes in reliability

Autorzy:

Grabski, F.

Powiązania:

https://bibliotekanauki.pl/articles/2069156.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

semi-markov perturbed process
approximate reliability function
asymptotic

Opis:

The paper is concerned with the application of perturbed semi-Markov (SM) processes in reliability problems. There are two kinds of perturbed SM processes presented in the paper. First of them was defined by Shpak and the second one was introduced by Pavlov and Ushakov. Shpak’s concept of perturbed SM is applied for calculating the approximate reliability function of many tasks operation process and Pavlov and Ushakov concept of that one is used to obtain the approximate reliability function of a repairable cold standby system with a switch.

Źródło:

Journal of Polish Safety and Reliability Association; 2013, 4, 2; 179--188
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 23.

Tytuł:

Integrated software tools supporting decision making on identification, prediction and optimization of complex technical systems operation, reliability and safety. Part 2. Integrated software tools application – Exemplary system operation and reliability unknown parameters identification

Autorzy:

Blokus-Roszkowska, A.
Kołowrocki, K.
Fu, X.

Powiązania:

https://bibliotekanauki.pl/articles/2069541.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

system operation process
reliability parameters
identification
software tools

Opis:

There is presented the application of the integrated software tools to the operation and reliability models of an exemplary complex technical system unknown parameters identification. There are performed in the paper, the exemplary system operation and reliability analysis and modelling. The identification of the probabilities of transitions this system operation process between the operation states and the conditional mean values of this process sojourn times at the particular operation states because of the lack of statistical data is performed throw the arbitrary fixing their values assumption. Next using the computer program CP 8.3 the automatic evaluation of the system components unknown intensities of departures the reliability state subsets and the identification of the exponential forms of their multistate reliability functions on the arbitrarily fixed statistical data coming from the system components states changing processes are performed as well.

Źródło:

Journal of Polish Safety and Reliability Association; 2011, 2, 2; 279--288
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 24.

Tytuł:

Reliability, availability and safety of complex technical systems : modelling – identification – prediction – optimization

Autorzy:

Kołowrocki, K.
Soszyńska, J.

Powiązania:

https://bibliotekanauki.pl/articles/2069542.pdf

Data publikacji:

2010

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability
safety
multistate system
operation process
complex system

Opis:

There is presented a practically well grounded approach concerned with the identification, evaluation, prediction and optimization of reliability, availability and safety of technical systems related to their operation processes. The main emphasis of this approach is on multi-state systems composed of ageing components and changing during the operation processes their structures and their components reliability and safety characteristics. There are proposed the convenient tools for analyzing these systems in the form of semi-markov modeling the systems’ operation processes and multistate modeling the systems’ reliability. There are described theoretical results of the proposed approach to reliability and safety analysis of multistate systems with degrading components in their operation processes and the possibility of their practical applications to the reliability and safety analysis and optimization of the complex technical port and maritime transportation systems.

Źródło:

Journal of Polish Safety and Reliability Association; 2010, 1, 1; 133--158
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 25.

Tytuł:

An event model of the operation process of unmanned aircraft vehicles used in the Polish Armed Forces

Autorzy:

Michalska, Anna

Powiązania:

https://bibliotekanauki.pl/articles/111043.pdf

Data publikacji:

2020

Wydawca:

Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.

Tematy:

exploitation process
reliability
unmanned aerial vehicles
armed forces

Opis:

The article addresses the issue of unmanned aircraft vehicles used in the armed forces of the Republic of Poland as a technological object undergoing the exploitation process in accordance with an event-based exploitation model. The author discusses problems related to the semantics of drones, which, in conjunction with the study of technical documentation and participant observation, allowed to qualify the operating state and determine the exploitation process event model for these devices together with the permitted transitions matrix. The presented results are the basis for further research on the reliability of these systems.

Źródło:

Inżynieria Bezpieczeństwa Obiektów Antropogenicznych; 2020, 2; 1-8
2450-1859
2450-8721

Pojawia się w:

Inżynieria Bezpieczeństwa Obiektów Antropogenicznych

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 26.

Tytuł:

Semi-Markov decision process as a safety and reliability model of a sea transport operations

Autorzy:

Grabski, F.

Powiązania:

https://bibliotekanauki.pl/articles/2069650.pdf

Data publikacji:

2010

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

safety reliability
semi-Markov decision process
transport operation

Opis:

A problem of optimization of a sea transport operation in safety and reliability aspect is discussed in the paper. To describe and solve this problem, a semi-Markov decision processes theory is applied. The semi-Markov decision process as a model of the sea transport operation is constructed. An algorithm which Allowi to compute the optimal strategy of the operation in safety and reliability aspect is presented.

Źródło:

Journal of Polish Safety and Reliability Association; 2010, 1, 1; 99--104
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 27.

Tytuł:

A computational tool for general model of industrial systems operations processes

Autorzy:

Lumanpauw, E.
Habibullah, M. S.
Kołowrocki, K.
Soszyńska, J.
Xie, M.

Powiązania:

https://bibliotekanauki.pl/articles/2069655.pdf

Data publikacji:

2009

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

stochastic process
semi-Markov model
computational tool
reliability

Opis:

The complexities of real industrial systems operation processes require computational methods that can analyze the large data and evaluate the behaviours of these systems. The use of methods such as Bayesian Network, Formal Safety Assessment and Statistical-Model based method were discussed as possibilities. Of which, a computational tool, based on the Semi-Markov model, was developed. This tool was then applied to analyze the behaviour of the operation processes of the oil transportation system in Dębogórze, Poland. The analyses showed that the computational solutions generated compared favorably well with the analytical calculations, enabling possible extensions of the tool to include reliability and optimization evaluations to be explored.

Źródło:

Journal of Polish Safety and Reliability Association; 2009, 2; 295--302
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 28.

Tytuł:

Iissledovanie silovykh parametrov formoobrazovanija profilnykh vintovykh ehlementov
Investigation of the power characteristics of the ellipse screw elements shaping

Autorzy:

Gevko, I.
Kuchvara, I.
Djachun, A.
Gypka, A.

Powiązania:

https://bibliotekanauki.pl/articles/77962.pdf

Data publikacji:

2015

Wydawca:

Komisja Motoryzacji i Energetyki Rolnictwa

Tematy:

agricultural engineering
reliability
screw conveyor
geometrical parameter
technological process

Źródło:

Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 7
1730-8658

Pojawia się w:

Motrol. Motoryzacja i Energetyka Rolnictwa

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 29.

Tytuł:

Semi-Markov processes: application in system reliability and maintenance

Autorzy:

Grabski, F.

Powiązania:

https://bibliotekanauki.pl/articles/2069404.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability
maintenance
semi-Markov process
semi-Markov perturbed processes

Opis:

The author’s monograph “Semi-Markov Processes: Application in System Reliability and Maintenance” which will be published by Elsevier in 2014 is presented. The paper is composed of an introduction, the monograph contents, conclusions and the references the monograph contents is based on.

Źródło:

Journal of Polish Safety and Reliability Association; 2014, 5, 1; 57--62
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 30.

Tytuł:

Operation and reliability optimization of complex technical systems

Autorzy:

Kołowrocki, K.
Soszyńska-Budny, J.

Powiązania:

https://bibliotekanauki.pl/articles/2069477.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability
multistate system
ageing
operation process
optimization
exemplary application

Opis:

Modelling and prediction of the operation and reliability of technical multistate ageing systems related to their operation processes called complex systems are briefly presented and applied to prediction of the operation processes and reliability characteristics of an exemplary complex non-homogeneous system composed of a series-parallel and a series-“m out of l” subsystems linked in series, changing its reliability structure and its components reliability parameters at variable operation conditions. Further, the linear programming is proposed to the operation and reliability optimization of complex technical systems operating at variable operation conditions. The method consists in determining the optimal values of limit transient probabilities at the system operation states that maximize the system lifetimes in the reliability state subsets. The proposed method is practically applied to the operation and reliability optimization of the considered exemplary complex system.

Źródło:

Journal of Polish Safety and Reliability Association; 2014, 5, 1; 91--106
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 31.

Tytuł:

Testing the integrated package of tools supporting decision making on identification, prediction and optimization of complex technical systems operation, reliability and safety. Part 7. IS&RDSS Application – Exemplary system operation and reliability new strategy

Autorzy:

Kołowrocki, K.
Soszyńska-Budny, J.
Xie, M.

Powiązania:

https://bibliotekanauki.pl/articles/2069532.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability
operation process
operation cost
complex systems
optimization
availability

Opis:

The paper presents the collection of the results concerned with the exemplary system operation, reliability, availability, maintenance and cost analysis, modelling, prediction and optimization coming from the Integrated Safety and Reliability Decision Support System - IS&RDSS application performed in its six previous parts. On the basis of the collected operation and reliability parameters and characteristics of the exemplary system before and after its operation process optimization, there is suggested its operation and reliability new strategy.

Źródło:

Journal of Polish Safety and Reliability Association; 2011, 2, 2; 445--452
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 32.

Tytuł:

Reliability, risk and availability based optimization of complex technical systems operation processes. Part 2, Application in port transportation

Autorzy:

Kołowrocki, K.
Soszyńska, J.

Powiązania:

https://bibliotekanauki.pl/articles/2069688.pdf

Data publikacji:

2009

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability
availability
complex system
operation process
optimization
piping transport

Opis:

The joint general model of reliability and availability of complex technical systems in variable operation conditions linking a semi-markov modeling of the system operation processes with a multi-state approach to system reliability and availability analysis and linear programming considered in the paper Part 1 are applied in maritime industry to reliability, risk and availability optimization of a port piping oil transportation system.

Źródło:

Journal of Polish Safety and Reliability Association; 2009, 1; 197--208
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 33.

Tytuł:

Reliability assessment for micro inertial measurement unit based on accelerated degradation data and copula theory

Autorzy:

Chi, Bingjia
Wang, Yashun
Hu, Jingwen
Zhang, Shufeng
Chen, Xun

Powiązania:

https://bibliotekanauki.pl/articles/2173134.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

MIMU
Wiener process
accelerated degradation test
copula
reliability assessment

Opis:

With its extensive use in industry, assessing the reliability of the micro inertial measurment unit (MIMU) has become a pressing need. Unfortunately, the MIMU is made up of several components, and the degradation processes of each are intertwined, making it difficult to assess the MIMU’s reliability and remaining useful life. In this research, we offer a reliability assessment approach for the MIMU, which has long-lifetime and multiple performance characteristics (PCs), based on accelerated degradation data and copula theory.Each PC model of MIMU is constructed utilizing drift Brownian motion to depict accelerated degradation process. The copula function is used to model the multivariate dependent accelerated degradation test data and to describe the dependency between multiple MIMU performance parameters. The particle swarm optimization algorithm is used to estimate the unknown parameters in the multi-dependent ADT model. Finally, the storage test and simulation example on MIMU’s accelerated degradation data verify the feasibility and effectiveness of the proposed method.

Źródło:

Eksploatacja i Niezawodność; 2022, 24, 3; 554--563
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 34.

Tytuł:

Variables state-based software usage model

Autorzy:

Fedasyuk, D.
Yakovyna, V.
Serdyuk, P.
Nytrebych, O.

Powiązania:

https://bibliotekanauki.pl/articles/410700.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Oddział w Lublinie PAN

Tematy:

software testing process
usage model
test scenario
software reliability

Opis:

This article describes a new mathematical software usage model, which includes the effect of the set of global and external variables values for further analysis of multi-test scenarios to improve the effectiveness of the testing software. This model is represented as a graph of transitions and a set of variables with respective sets of equivalence classes. The proposed approach is particularly relevant for computational algorithms with complex logic.

Źródło:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2014, 3, 2; 15-20
2084-5715

Pojawia się w:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 35.

Tytuł:

Monte Carlo simulation application to reliability assessment of an exemplary system operating at variable conditions

Autorzy:

Kołowrocki, K.
Kuligowska, E.
Soszyńska-Budny, J.

Powiązania:

https://bibliotekanauki.pl/articles/2069213.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

system reliability
system operation process
Monte Carlo simulation approach

Opis:

A semi-Markov process is applied to construct the multistate model of the system operation process and its main characteristics are determined. Analytical linking of the system operation process model with the system multistate reliability model is proposed to get a general reliability model of the complex system operating at varying in time operation conditions and to find its reliability characteristics. The Monte Carlo simulation algorithm based on the integrated general model of a complex multistate system reliability, linking its reliability model and its operation process model and considering variable at different operation states its reliability structure and its components reliability parameters is applied to the reliability evaluation of an exemplary system. Next the results of this simulation method application are illustrated and compared with the results obtained by the analytical method.

Źródło:

Journal of Polish Safety and Reliability Association; 2015, 6, 1; 137--144
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 36.

Tytuł:

Integrated software tools supporting decision making on identification, prediction and optimization of complex technical systems operation, reliability and safety. Part 3. Integrated software tools application – Exemplary system operation and reliability characteristics prediction

Autorzy:

Blokus-Roszkowska, A.
Kołowrocki, K.
Fu, X.

Powiązania:

https://bibliotekanauki.pl/articles/2069549.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

system operation process
reliability characteristics
availability
prediction
software tools

Opis:

There is presented the application of the integrated software tools to the operation and reliability of an exemplary complex technical system prediction. The computer program CP 8.5 is used to determine the unconditional mean sojourn times and the limit transient probabilities of the exemplary system operation process at the particular operation states evaluations. Using the computer program CP 8.6 there are performed the evaluations of the exemplary system unconditional multistate reliability function, the expected values and the standard deviations of its unconditional lifetimes in the reliability state subsets and the mean values of its lifetimes in the particular reliability states. Finally, in the case when the system is repairable, its renewal and availability characteristics are estimated from the results of computer program CP 8.8.

Źródło:

Journal of Polish Safety and Reliability Association; 2011, 2, 2; 289--296
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 37.

Tytuł:

Systems reliability analysis in variable operation conditions

Autorzy:

Soszyńska, J.

Powiązania:

https://bibliotekanauki.pl/articles/2069605.pdf

Data publikacji:

2007

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability function
semi-markov process
large multi state system

Opis:

The semi-markov model of the system operation process is proposed and its selected parameters are defined. There are found reliability and risk characteristics of the multi-state series- “m out of k ” system. Next, the joint model of the semi-markov system operation process and the considered multi-state system reliability and risk is constructed. The asymptotic approach to reliability and risk evaluation of this system in its operation process is proposed as well.

Źródło:

Journal of Polish Safety and Reliability Association; 2007, 2; 319--330
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 38.

Tytuł:

Preliminary reliability, risk and availability analysis and evaluation of bulk cargo transportation system in variable operation conditions

Autorzy:

Kołowrocki, K.
Kwiatuszewska-Sarnecka, B.
Soszyńska, J.

Powiązania:

https://bibliotekanauki.pl/articles/2069686.pdf

Data publikacji:

2009

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

system operation process
multi-state system
reliability
risk
availability

Opis:

In the paper, definitions and theoretical results on system operations process, multi-state system reliability, risk and availability modelling are illustrated by the example of their application to a bulk cargo transportation system operating in Gdynia Port Bulk Cargo Terminal. The bulk cargo transportation system is considered in varying in time operation conditions. The system reliability structure and its components reliability functions are changing in variable operation conditions. The system reliability structures are fixed with a high accuracy. Whereas, the input reliability characteristics of the bulk cargo transportation system components and the system operation process characteristics are not sufficiently exact because of the lack of statistical data. Anyway, the obtained evaluation may be a very useful example in simple and quick systems reliability characteristics evaluation, especially during the design and improving the transportation systems operating in ports.

Źródło:

Journal of Polish Safety and Reliability Association; 2009, 1; 179--188
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 39.

Tytuł:

Analysis of system operation process influence on its reliability

Autorzy:

Kuligowska, E.

Powiązania:

https://bibliotekanauki.pl/articles/2069392.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

system reliability
system operation process
analytical approach
Monte Carlo simulation

Opis:

The paper presents analytical and Monte Carlo simulation methods applied to the reliability evaluation of a system operating in two different operation states. A semi-Markov process is applied to construct the system operation model and its main characteristics are determined. Analytical linking of this operation model with the system reliability model is proposed to get a general reliability model of the system operating at two varying in time operation conditions and to find its reliability characteristics. The application of Monte Carlo simulation based on this general model to the reliability evaluation of this system is proposed as well. The exemplary results obtained from those two considered methods are illustrated.

Źródło:

Journal of Polish Safety and Reliability Association; 2014, 5, 1; 125--135
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Application of the theory of semi-Markov processes to the development of a reliability model of an automotive vehicle
Zastosowanie teorii procesów semi-Markowa do opracowania modelu niezawodnościowego samochodu

Autorzy:

Girtler, J.
Ślęzak, M.

Powiązania:

https://bibliotekanauki.pl/articles/1364785.pdf

Data publikacji:

2012

Wydawca:

Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji

Tematy:

niezawodność
proces semimarkowski
samochód
automotive vehicle
reliability
semi-Markov process

Opis:

A possibility of applying the theory of semi-Markov (semimarkovian) processes to the description of the reliability of an automotive vehicle has been presented, with taking a passenger car as an example. In the car considered, such constructional systems (functional components) as engine with fuel, lube oil, and coolant feeding systems, clutch, gearbox, drive shaft, driving axle, steering and suspension system, braking system, electrical system, body with chassis, and measuring and monitoring equipment have been distinguished. A reliability model of the car has been developed in the form of a semi-Markov process, which is a single-state model. The set of reliability states has been built as consisting of one state of car serviceability and ten states of the functional components as specified above. A graph of changes in these states has been shown and an initial distribution and a functional matrix representing changes in the said reliability states of the car have been defined. Formulas have been derived that define the boundary distribution of the process of changes in the technical states of such a car. This distribution represents the probability of the car being serviceable and unserviceable due to a failure of any of the functional components mentioned above. The possibility of using statistics to estimate the probabilities of changes in the said car reliability states has been presented. A possibility of applying the theory of semi-Markov processes to the investigation of car reliability in the case of defining the instantaneous distribution of the process of changes in the car reliability states has also been mentioned.
W artykule przedstawiono możliwość zastosowania teorii procesów semi-Markowa (semimarkowskich) do opisu niezawodności samochodu, na przykładzie samochodu osobowego. W rozważaniach uwzględniony został samochód, w którym wyróżniono takie węzły konstrukcyjne (zespoły funkcjonalne) jak: silnik z układami zasilania czynnikami energetycznymi (paliwem, olejem smarowym i cieczą chłodzącą), sprzęgło, skrzynia biegów, wał napędowy, most napędowy, zespół kierowniczy z zawieszeniem, zespół hamulcowy, zespół urządzeń elektrycznych, nadwozie wraz z podwoziem i zespół urządzeń kontrolno-pomiarowych. Opracowano model niezawodnościowy samochodu w formie procesu semimarkowskiego, który jest modelem jedenastostanowym. Do zbioru stanów niezawodnościowych samochodu zakwalifikowano stan zdatności samochodu oraz dziesięć stanów niezdatności wymienionych zespołów funkcjonalnych. Przedstawiono graf zmian tych stanów oraz określono rozkład początkowy i macierz funkcyjną odwzorowującą zmiany wymienionych stanów niezawodnościowych samochodu. Wyprowadzone zostały wzory określające rozkład graniczny procesu zmian stanów technicznych takiego samochodu. Rozkład ten stanowią prawdopodobieństwa przebywania samochodu w stanie zdatności oraz w stanach niezdatności wskutek uszkodzenia dowolnego z wymienionych jego zespołów funkcjonalnych. Przedstawiono możliwość zastosowania statystyki do oszacowania prawdopodobieństw zmiany wspominanych stanów niezawodnościowych samochodu. Zasygnalizowano także możliwość zastosowania teorii procesów semimarkowskich do badań niezawodności samochodów w przypadku opracowania rozkładu chwilowego procesu zmian ich stanów niezawodnościowych.

Źródło:

Archiwum Motoryzacji; 2012, 2; 15-27
1234-754X
2084-476X

Pojawia się w:

Archiwum Motoryzacji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Reliability analysis of a system subjected to two-state operation process

Autorzy:

Kuligowska, E.

Powiązania:

https://bibliotekanauki.pl/articles/358995.pdf

Data publikacji:

2013

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

reliability analysis
simulation methods
operation states
semi-Markov process
modeling

Opis:

The paper presents analytical and Monte Carlo simulation methods applied to the reliability evaluation of a system operating at two different operation states. A semi-Markov process is applied to construct the system operation model and its main characteristics are determined. Analytical linking of this operation model with the system reliability model is proposed to get a general reliability model of the system operating at two varying operation conditions and to find its reliability characteristics. The application of Monte Carlo simulation based on this general model to the reliability evaluation of this system is proposed as well. The results obtained from those two considered methods are evaluated.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 36 (108) z. 1; 100-104
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Non-renewal multistate system with Semi-Markov components

Autorzy:

Grabski, F.

Powiązania:

https://bibliotekanauki.pl/articles/2069483.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

Semi-Markov process
multistate system
multistate reliability functions
binary representation

Opis:

The paper deals with non-renewal multistate monotone systems consisting of multistate components which are modeled by the semi-Markov processes. In the case of a non-renewal system the multistate reliability functions of the system components and the whole system are discussed. All presented concepts and models are illustrated by simple numerical examples.

Źródło:

Journal of Polish Safety and Reliability Association; 2014, 5, 1; 63--70
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Integrated software tools supporting decision making on identification, prediction and optimization of complex technical systems operation, reliability and safety. Part 4. Integrated software tools application – Exemplary system operation and reliability optimization

Autorzy:

Blokus-Roszkowska, A.
Kołowrocki, K.
Salahuddin, H. M.

Powiązania:

https://bibliotekanauki.pl/articles/2069539.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

operation process optimization
optimal characteristics
reliability
availability
renewal
software tools

Opis:

There is presented the application of the integrated software tools to the operation and reliability of an exemplary complex technical system optimization. First using the computer program CP 8.9 there are determined the optimal limit transient probabilities of the exemplary system operation process at the particular operation states maximizing the system lifetime in the reliability states not worse than the critical reliability state and its optimal sojourn times at the particular operation states. Program CP 8.9 allows also for automatic evaluation of the exemplary system optimal unconditional multistate reliability function, the optimal expected values and standard deviations of its unconditional lifetimes in the reliability state subsets and the optimal mean values of its lifetimes in the particular reliability states. Moreover, in the case when the system is repairable, its optimal renewal and availability characteristics are obtained using the computer program CP 8.11.

Źródło:

Journal of Polish Safety and Reliability Association; 2011, 2, 2; 297--306
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Four-state stochastic model of changes in the reliability states of a motor vehicle
Model stochastyczny czterostanowy zmian stanów niezawodnościowych samochodu

Autorzy:

Girtler, J.
Ślęzak, M.

Powiązania:

https://bibliotekanauki.pl/articles/1366153.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

niezawodność
proces semimarkowski
samochód
reliability
semi-Markov process
motor vehicle

Opis:

The properties of semi-Markov processes have been generally characterized and the applicability of the theory of such processes to the determining of the reliability of motor cars and other road vehicles has been explained. A formal description of the process of changes in the motor vehicle technical states considered as reliability states and a model of this process in the form of a one-dimensional stochastic process have been presented. The values of this process are the technical states of the motor vehicle in question that have significant practical importance. A four-state set of states interpreted as follows has been adopted: full (complete) serviceability, partial (incomplete) serviceability, task-limiting serviceability,and complete (total) unserviceability. Based on the initial distribution adopted and the functional matrix worked out, the boundary distribution of the process of changes in the technical (reliability) states of the motor vehicle has been defined. The probability of the vehicle being fully serviceable has been considered a measure of the vehicle reliability for a long period of vehicle operation. A possibility of defining the vehicle reliability in the form of a probability that a task would also be fulfilled by the vehicle being partially serviceable has also been indicated.
W artykule scharakteryzowano ogólnie własności procesów semimarkowskich i uzasadniono możliwości ich zastosowania do określenia niezawodności samochodów i innych pojazdów drogowych. Przedstawiono formalny opis procesu zmian stanów technicznych samochodów uznanych za stany niezawodnościowe oraz model tego procesu w postaci jednowymiarowego procesu stochastycznego. Wartościami tego procesu są występujące w czasie eksploatacji stany techniczne samochodów, mające istotne znaczenie praktyczne. Przyjęto czterostanowy zbiór stanów o następującej interpretacji: stan zdatności pełnej (całkowitej), stan zdatności częściowej (niepełnej, niecałkowitej), stan niepełnej zdatności zadaniowej i stan niezdatności pełnej (całkowitej). Na podstawie przyjętego rozkładu początkowego i opracowanej macierzy funkcyjnej został określony rozkład graniczny procesu zmian stanów technicznych (niezawodnościowych) samochodu. Prawdopodobieństwo istnienia stanu zdatności pełnej (całkowitej) samochodu zostało uznane za miarę jego niezawodności w długim okresie czasu eksploatacji. Wskazano też na możliwość określenia niezawodności samochodu w formie prawdopodobieństwa, w którym uwzględniony został przypadek wykonania zadania przez samochód także wtedy, gdy znajduje się on w stanie zdatności częściowej.

Źródło:

Eksploatacja i Niezawodność; 2013, 15, 2; 156-160
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Reliability of large port grain transportation system

Autorzy:

Kołowrocki, K.
Soszyńska-Budny, J.
Torbicki, M.

Powiązania:

https://bibliotekanauki.pl/articles/2069510.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

reliability
multistate system
ageing
large system
operation process
grain transportation system

Opis:

The combination of the results on the reliability of complex multi-state systems related to their operation processes and the results concerning the limit reliability functions of the multistate systems is proposed, to obtain the results on the asymptotic approach to the evaluation of the large complex multi-state systems reliability at the variable operation conditions. The asymptotic approach to the large complex system reliability evaluation and the large complex system limit reliability function are defined. Limit reliability functions of selected large complex systems composed of components having Weibull reliability functions are fixed. The way of using this results is illustrated by their application to the evaluation of reliability characteristics of the large complex port grain transportation subsystem composed of three large multistate non-homogeneous series systems and changing its reliability structure and its components reliability parameters at variable operation conditions.

Źródło:

Journal of Polish Safety and Reliability Association; 2014, 5, 2; 77--86
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Reliability of complex system under operation process influence : Monte Carlo simulation Approach

Autorzy:

Kołowrocki, K.
Kuligowska, E.
Soszyńska-Budny, J.

Powiązania:

https://bibliotekanauki.pl/articles/2069246.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

multistate system
operation process
complex system
reliability
Monte Carlo simulation method

Opis:

The paper presents Monte Carlo simulation method applied to the reliability evaluation of a multistate system subjected to a variable multistate operation process. The system operation process model is linked with the system reliability model and proposed to get a general reliability model of the complex system operating at varying in time operation conditions and to find its reliability characteristics. The Monte Carlo simulation algorithm based on the integrated general model of a complex multistate system reliability, linking its reliability model and its operation process model and considering variable at different operation states its reliability structure and its components reliability parameters is applied to the reliability evaluation of port grain transportation system. Next the results of this simulation method application are illustrated and compared with the results obtained by the analytical method.

Źródło:

Journal of Polish Safety and Reliability Association; 2015, 6, 1; 145--154
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Safety and reliability models of time-dependent systems

Autorzy:

Babczyński, T.
Kowalski, M.
Łukowicz, M.
Magott, J.
Skrobanek, P.

Powiązania:

https://bibliotekanauki.pl/articles/2069500.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

dynamic reliability
maintenance process
fault tree with time dependencies
activity diagram

Opis:

The paper concerns models with time dependencies that can be used in modelling dynamic reliability and complex maintenance processes. Emphasis is put on models that have been elaborated with authors participation. The following models are presented: fault trees with time dependencies, probabilistic fault trees with time dependencies, reliability enhanced activity diagrams. The above models are illustrated by examples. Both types of fault trees are used in modelling the time coordination of distance protections in high voltage transmission line. Then reliability enhanced activity diagrams that express the maintenance process of computer system with redundant components. Components are submitted to failures and repairs.

Źródło:

Journal of Polish Safety and Reliability Association; 2011, 2, 1; 11--22
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

The impact of changing the fuel dose on chosen parameters of the diesel engine start-up process

Autorzy:

Caban, Jacek
Droździel, Paweł
Ignaciuk, Piotr
Kordos, Paweł

Powiązania:

https://bibliotekanauki.pl/articles/374091.pdf

Data publikacji:

2019

Wydawca:

Politechnika Śląska. Wydawnictwo Politechniki Śląskiej

Tematy:

diesel engine
start-up process
reliability
silnik diesla
proces rozruchu
niezawodność

Opis:

For internal combustion engines, many faults relating to the combustion process can occur, which affect the engine technical condition, its electrical equipment, the natural environment, etc. This article presents the results of the influence of the regulatory factor, which was the fuel dose (3 dose values), on selected parameters of the start-up process at constant settings of other control parameters (fuel injection advance angle and injection pressure). The tests of the start-up process were carried out on a fourstroke single-cylinder diesel engine. In this study, the results of the following electrical start-up parameters were analyzed: the maximum current consumed by the starter, difference of voltages on the battery before and after the start-up, voltage drop on the battery at the beginning of the start-up, average power of the starter, starter operation time, and the maximum pressure value in the first combustion cycle.

Źródło:

Transport Problems; 2019, 14, 4; 51-92
1896-0596
2300-861X

Pojawia się w:

Transport Problems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Osobennosti metodiki ehksperimentalnykh issledovanijj mekhanizirovannykh procesov poluchenija semennogo materiala ogurca i dyni
Features of experimental research methodology of mechanized processes of cucumber and melon seed obtaining

Autorzy:

Pastushenko, S.
Pastushenko, A.

Powiązania:

https://bibliotekanauki.pl/articles/77424.pdf

Data publikacji:

2013

Wydawca:

Komisja Motoryzacji i Energetyki Rolnictwa

Tematy:

seed
cucumber
melon
regression coefficient
quality indicator
process optimization
reliability
experimental research

Opis:

Listed features of methodical approach of holding experimental researches of cucumber and melon seed obtaining workflows to check and if necessary correct theoretical assumptions, arguments and conclusions. In the research was used plan Hartley for five three-level factorial plan with the number of experiments equal to 27, which in resolving problems associated with technical objects agricultural production, not previously used. The main optimization criteria, which conducted evaluation of quality of the process, were chosen the loss of seeds and seed purity.

Źródło:

Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 2
1730-8658

Pojawia się w:

Motrol. Motoryzacja i Energetyka Rolnictwa

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Wybrane problemy oceny niezawodnościowej procesów produkcyjnych
Selected issues in production process reliability assessment

Autorzy:

Chlebus, M.
Werbińska-Wojciechowska, S.

Powiązania:

https://bibliotekanauki.pl/articles/203183.pdf

Data publikacji:

2017

Wydawca:

Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej

Tematy:

proces produkcyjny
ocena niezawodnościowa
studium przypadku
production process
reliability assessment
case study

Opis:

W artykule autorzy skupili się na problemie oceny niezawodnościowej procesów produkcyjnych. Analizy niezawodności procesów produkcyjnych wymagają uwzględnienia wielu różnych czynników oraz uwarunkowań. W związku z tym, opierając się na opracowanej wielowymiarowej definicji niezawodności procesu produkcyjnego, przedstawiono przegląd literatury z obszaru inżynierii niezawodności systemów produkcyjnych. Następnie na podstawie studium przypadku wskazano możliwości implementacji opracowanego podejścia. Pracę kończy podsumowanie oraz wskazanie dalszych kierunków prac badawczych.
In the paper, the authors focus on the problem of reliable performance of production processes. Reliability analyses of production systems involve considering many different factors and requirements. Therefore, based on the authors’ developed multidimensional definition of production process reliability, a brief literature review in reliability engineering of production systems is provided. Next, a short case study indicates the implementation possibilities of the developed approach. The work ends with a summary and directions for further research.

Źródło:

Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie; 2017, 72; 5-18
0239-9415

Pojawia się w:

Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie

Dostawca treści:

Biblioteka Nauki

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