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Journal Details
Format
Journal
eISSN
2083-4608
ISSN
1895-8281
First Published
26 Feb 2008
Publication timeframe
4 times per year
Languages
English

Search

Volume 25 (2013): Issue 1 (March 2013)

Journal Details
Format
Journal
eISSN
2083-4608
ISSN
1895-8281
First Published
26 Feb 2008
Publication timeframe
4 times per year
Languages
English

Search

14 Articles
Open Access

Ecological Security of a Marine Combustion Engine – A Formal Approach / Bezpieczeństwo Ekologiczne Silnika Okrętowego – Podejście Formalne

Published Online: 15 Nov 2013
Page range: 5 - 164

Abstract

Abstract

The authors have formed a definition of „ecological security of a marine combustion engine” originating from a general notion of ‘security’. The process of changes of the engine condition influencing the ecological security has been described formally. Based on this process the authors have introduced the notion of structural function of an engine and the structure of its ecological security. The state of ecological security of an engine as a whole has been formulated as a stochastic process and the function, being a one-dimensional distribution of this process, has been used as a measure of the ecological security of an engine at any given moment in its service life. A general example of optimization of this structure has been given based on the fulfillment by the engine of the requirements related to the emission of nitric oxides. It has been assumed that the actions taken aiming at the fulfillment of these requirements allow an obtainment of certain structures of the engine ecological security.

Keywords

  • marine combustion engine
  • ecological security
  • structure of ecological security
  • optimization of ecological security

Słowa kluczowe

  • okrętowy silnik spalinowy
  • bezpieczeństwo ekologiczne
  • struktura bezpieczeństwa ekologicznego
  • optymalizacja bezpieczeństwa ekologicznego
Open Access

Reliability Analysis of Helicopter’s Supportingstracture with SSI and SST Models Used / Analiza Niezawodnościowa Struktury Nośnej Śmigłowca Modelami SSI Oraz SST

Published Online: 15 Nov 2013
Page range: 13 - 20

Abstract

Abstract

In this work, algorithms have been used to compare the methods for determining reliability of critical points. Generalized models Stress-Strength- Interference (SSI) and Stress-Strength-Time (SST) have been analyzed. Input to the algorithms, stress and strength were generated by using the Markov chain model based on actual flight records. With this approach methods of determining the reliability of critical points of a helicopter’s structure are justified.

Keywords

  • reliability
  • safety
  • stress-strength-interference
  • stress-strength-time

Słowa kluczowe

  • niezawodność
  • bezpieczeństwo
  • stress-strength-interference
  • stress-strength-time
Open Access

Impact of Infrastructure Type on Reliability of Railway Transportation System / Wpływ Rodzaju Infrastruktury Na Niezawodność Systemu Transportu Szynowego

Published Online: 15 Nov 2013
Page range: 21 - 36

Abstract

Abstract

In this paper, the author’s research work is focused on infrastructure impact on railway transportation system reliability. The aim of research described in the paper is to determine correlation between type (and age) of used infrastructure elements, and number of occurring failures. For this purpose, subsystem of infrastructure and associated with it events, were divided into main groups. Examples of groups are: track, train operation devices (related to operating control points or railway line), level crossings, etc. The second aspect is correlation between type of infrastructure and failure consequences. It is required from transportation that it is possible to achieve the right place at the right time in a safety way. Therefore, from the point of view of transportation process, which is the main goal of transportation system, the most significant failure consequences are delays. Moreover, speaking about reliability and safety of railway transportation system, the question arises what is the relation between number of trains and number of unwanted events?

Keywords

  • railway transportation system
  • infrastructure
  • reliability

Słowa kluczowe

  • transport pasażerski
  • strategia obsługiwania
  • system ekspertowy
  • opóźnienie czasowe
Open Access

The Method of Evaluation of Initial Availability in the Transport System of City Buses / Metoda Oceny Gotowości Początkowej W Systemie Autobusowego Transportu Miejskiego

Published Online: 15 Nov 2013
Page range: 37 - 44

Abstract

Abstract

This paper presents the method of evaluation of initial availability of means of transport to carry out the assigned transport tasks. As an example of research object illustrating the presented deliberations, an actual city bus system from a selected urban agglomeration was used. In systems of this type, the technological objects (means of transport) have to initiate carrying out of the assigned transport tasks at assigned times, according to the adopted timetable. In order to assure the possibility to fulfill the transport tasks at assigned times, the so called time buffer is implemented in order for the necessary service processes to be carried out. In order to evaluate the availability of means of transport in the operational cycle of which the so called time buffer was implemented, it is convenient to use the characteristics describing initial availability of technological objects. Initial availability determines the probability of initiating (activating) the necessary number of technological objects in order to carry out the assigned tasks over a designated time period needed for their preparation and activation. The presented deliberation is illustrated by examples of the results of evaluation of initial availability in the actual tested transport system.

Keywords

  • transport system
  • initial availability
  • city buses

Słowa kluczowe

  • system transportowy
  • gotowość początkowa
  • autobusy miejskie
Open Access

Flight Tests of the Unmanned Helicopter ILX-27 – Some Selected Issues / Zagadnienia Prób W Locie Bezzałogowego Śmigłowca ILX-27

Published Online: 15 Nov 2013
Page range: 45 - 58

Abstract

Abstract

The unmanned helicopter ILX-27 has been designed and developed under the NCBR (in English, NCRD - National Center for Research and Development) project on the “Unmanned helicopter - a special-purpose aerobot” carried out by the Institute of Aviation (IL) and the Air Force Institute of Technology (ITWL), both in Warsaw, and the Military Aviation Works No. 1 J.S.C. in Łódź (WZL Łódź). The helicopter in question is a design initiated and developed solely as an unmanned vehicle in the weight category (MTOW) of 1100 kg. It is the outcome of a complex approach to issues of the helicopter’s structure and aerodynamics, and those of controlling it at different flight phases. From the very beginning, flight tests of this unmanned helicopter have been carried out under the remote-control mode of operation. The paper has been intended to present the outcomes of some selected stages of the project, i.e. the study and tests of groundcontrol components, and the flight tests.

Keywords

  • UAV

Słowa kluczowe

  • BSP
Open Access

Managing DO-178 Compliance with IBM Rational Platform / Zarządzanie Zgodnością Z DO-178 Przy Użyciu Platformy IBM Rational

Published Online: 15 Nov 2013
Page range: 59 - 74

Abstract

Abstract

DO178 is a standard for avionic software for the aerospace industry which can be used as a guidance to determine if the software product will perform reliability in airborne environment. The standard has 5 different certification levels each of which has a certain set of objectives. The certification levels are determined depending on how critical the system or subsystem is. To address DO- 178 objectives, companies need a defined systems and software engineering process that can delineate workflows, inputs, outputs, roles and responsibilities.

The major objectives outlined in the DO-178 standard include;

- Requirements engineering

- Design and development.

- Validation and verification

- Engineering tasks, such as configuration and change management

In this presentation, we will try to explain the main principles of the DO178 standard very briefly and try to give an insight about how the objectives of this standard can be satisfied.

Keywords

  • Safety
  • DO-178
  • requirements engineering
  • systems engineering
  • aerospace

Słowa kluczowe

  • Bezpieczeństwo
  • DO-178
  • ustalenie wymagań
  • projektowanie systemów
  • lotnictwo i kosmonautyka
Open Access

Safety of Machinery – Determination of Performance Level / Bezpieczeństwo Maszyn – Wyznaczanie Poziomu Zapewnienia Bezpieczeństwa

Published Online: 15 Nov 2013
Page range: 75 - 84

Abstract

Abstract

The article presents a method for determining the performance level (PL) on the basis of the PN-EN ISO 13849-1 standard, which is harmonized with the machinery directive 2006/42/EC. The risk assessment and risk reduction criteria, according to PN-EN ISO 12100, were briefly characterized. The focus was put on determining the required performance level PLr on the basis of a risk graph. The method was presented how to use a safety function composed of input-, logicaland execution subsystems. It was demonstrated how to determine the achieved PL for a safety function composed of hardware elements on the basis of a safety category, mean time to dangerous failures (MTTFd), diagnostic coverage (DC), and immunity to common cause failures (CCF).

Keywords

  • machinery directive 2006/42/EC
  • performance level PL
  • safety category
  • mean time to dangerous failures MTTFd
  • diagnostic coverage DC
  • common cause failures CCF

Słowa kluczowe

  • dyrektywa maszynowa 2006/42/WE
  • poziom zapewnienia bezpieczeństwa PL
  • kategorie bezpieczeństwa
  • średni czas pomiędzy niebezpiecznymi uszkodzeniami MTTFd
  • pokrycie diagnostyczne DC
  • uszkodzenia spowodowane wspólną przyczyną CCF
Open Access

Assessment of the Influence of the Human Factor on Safety of the Transportation Process / Ocena Wpływu Czynnika Ludzkiego Na Bezpieczeństwo Procesu Transportowego

Published Online: 15 Nov 2013
Page range: 85 - 96

Abstract

Abstract

Safety of the transport process is a criterion of top priority for a transportation system operation and maintenance. It is of special importance in case of public municipal transportation. Systems of this type operate in specific road conditions: increased intensity of traffic during a day and night, a big number of pedestrians as well as drivers of other vehicles. In such conditions the human factor and its impact on the transport system operation is of key importance. A human can be involved in the transportation system as a driver, passenger, pedestrian, or in another way (cyclist, motorcyclist). Improper behavior of people account for 36% - 46% of road accident causes defined as undesirable events occurred within the space of the road. In this paper there has been mad an attempt to evaluate the transportation system from the point of view of people present in the transportation system and its environment.

Keywords

  • safety working
  • undesirable event

Słowa kluczowe

  • bezpieczeństwo działania
  • zdarzenie niepożądane
Open Access

Assessment of the Impact of Human on Safety of Transportation Systems Operation / Ocena Wpływu Oddziaływań Człowieka Na Bezpieczeństwo Działania Systemu Transportowego

Published Online: 15 Nov 2013
Page range: 97 - 106

Abstract

Abstract

Collisions are inseparably connected with road traffic. Driving a mechanical vehicle requires not only a good knowledge of traffic rules and appropriate skills but also physical and psychical fitness. The road system consists of three basic elements such as: road, vehicle and human. From the point of view of safety of the executed transport process this is the human who plays the most important role in it. They need to have the ability of quick situation estimation and providing proper response to it involving performance of right maneuvers and adjusting them to a given situation. Studying transportation systems it should be remembered that the role of a human plays in them is of different character. They may be drivers, passengers or belong to the environment. Thus, their behavior has a large influence on the transportation system safe functioning including both public and individual transport.

Keywords

  • hazard
  • safety
  • transportation system
  • impact

Słowa kluczowe

  • zagrożenie
  • bezpieczeństwo
  • system transportowy
  • oddziaływanie
Open Access

Emergency Water Supply of Rzeszow / Kryzysowe Zaopatrzenie Rzeszowa W Wodę

Published Online: 15 Nov 2013
Page range: 107 - 116

Abstract

Abstract

In this study the methodology of balancing water needs in a crisis situation was presented. The example was done for city of Rzeszow. The municipal infrastructure: water supply system, sewage system, gas network, heating and energy systems was shortly characterized. The research undertaken in this study was related to Systemic Crisis Management and protection of the inhabitants of the city. The balance of emergency water supply Rzeszow in drinking water for the 29 neighborhoods of the city was shown.

Keywords

  • collective water supply system
  • consumer risk
  • failure

Słowa kluczowe

  • awaryjność sieci wodociągowych
  • zarządzanie kryzysowe
Open Access

Asset Management Supported by Reliability Engineering / Zarządzanie Aktywami, Wspomagane Inżynierią Niezawodności

Published Online: 15 Nov 2013
Page range: 117 - 128

Abstract

Abstract

Reliability methods are widely applied in design and manufacturing. Techniques such as FMEA, Life Data Analysis (aka Weibull analysis), Reliability Growth, System Analysis and Simulation, and FRACAS amongst others, represent the foundation of a solid reliability program. The collection of these tools and the process of deploying them appropriately is known as DFR in the design and manufacturing sector. Some of these tools and methods have also been applied in the maintenance sector (operators vs. manufacturers), but in many cases not as extensively. In this paper we propose a process for deploying different reliability tools and methodologies and we review their applicability in Asset Management. The proposed Asset Performance Management Process is linked to the DMAIC process and was inspired from the very successful DFR process. The proposed APM process lays down the different APM stages and the corresponding activities within each stage that need to be performed in order to achieve and sustain high asset reliability and availability, as well as reduce the operating costs.

Open Access

Different Analysis Procedures for Computing the Reliability of Repairable Systems / Różne Procedury Analizy Dla Obliczania Niezawodności Systemów Podlegających Naprawie

Published Online: 15 Nov 2013
Page range: 129 - 144

Abstract

Abstract

This paper will review the different analysis scenarios that can be used when examining the reliability of repairable systems. Five different methods will be reviewed, specifically:

1) Using the mean value of the times between failure (TBFs) at the system level.

2) Using the distributions of the components of the system and creating a reliability block diagram (RBD).

3) Using the distribution of the times between failure (TBFs) at the system level.

4) Using the system level failure data and fitting the non-homogeneous Poisson process (NHPP) model.

5) Using the system level failure data and fitting the general renewal process (GRP) model.

In the paper, the five different methods will be discussed (brief background), and conclusions about the applicability and accuracy of each method will be given. In addition, this paper can be used to further understand the assumptions behind each analysis method, the data required and the type of results that can be obtained, thus assisting analysts in choosing the most appropriate method.

Open Access

The Reliability Testing of Brick Infrastructure with Operating Modal Analysis / Badanie Niezawodności Infrastruktury Murowej Z Użyciem Operacyjnej Analizy Modalnej

Published Online: 15 Nov 2013
Page range: 145 - 164

Abstract

Abstract

Modal analysis is widely used in the removal of defects caused by vibration of infrastructure, structure modification, updating the analytical model, or the control of the state and is used to monitor the vibration of structures in the aerospace and civil engineering mechanics from early 1990 began to pay close attention to the use of operational modal analysis (OMA) in a study of the existing building structures. In this case, the vibration exciter platforms, buildings, towers, bridges, etc. to force Operating (ambient). Here we measure only the response of the force generated by the environment. OMA is also very attractive for aerospace and mechanical engineering. This article presents the results of the existing building structure (reinforced concrete wall using operational modal analysis software and used to carry out the LMS and visualization of the results of such research.

Keywords

  • operational modal analysis
  • the frequency of vibration
  • stability diagram

Słowa kluczowe

  • operacyjna analiza modalna
  • częśtość drgań
  • diagram stabilizacyjny
Open Access

Exploitation of the CWSS in the Aspect of Belonging to the Critical Infrastructure / Eksploatacja Szzw W Aspekcie Przynależności Do Infrastruktury Krytycznej

Published Online: 15 Nov 2013
Page range: 165 - 172

Abstract

Abstract

CWSS exploitation in terms of belonging to a critical infrastructure is an important issue and requires a detailed analysis. Therefore it is important to develop emergency plans for the supply of drinking water for different crisis situations, as well as detailed analysis of the risk of possible undesirable events in CWSS, in order to develop a comprehensive safety management program of the system. In this work the problems associated with the operation of CWSS in terms of belonging to critical infrastructure were presented. Also the methodology to determine the crisis management time in the WSS, connected with a shortage of drinking water was shown.

Keywords

  • collective water supply system
  • exploitation

Słowa kluczowe

  • system zbiorowego zaopatrzenia w wodę
  • eksploatacja
14 Articles
Open Access

Ecological Security of a Marine Combustion Engine – A Formal Approach / Bezpieczeństwo Ekologiczne Silnika Okrętowego – Podejście Formalne

Published Online: 15 Nov 2013
Page range: 5 - 164

Abstract

Abstract

The authors have formed a definition of „ecological security of a marine combustion engine” originating from a general notion of ‘security’. The process of changes of the engine condition influencing the ecological security has been described formally. Based on this process the authors have introduced the notion of structural function of an engine and the structure of its ecological security. The state of ecological security of an engine as a whole has been formulated as a stochastic process and the function, being a one-dimensional distribution of this process, has been used as a measure of the ecological security of an engine at any given moment in its service life. A general example of optimization of this structure has been given based on the fulfillment by the engine of the requirements related to the emission of nitric oxides. It has been assumed that the actions taken aiming at the fulfillment of these requirements allow an obtainment of certain structures of the engine ecological security.

Keywords

  • marine combustion engine
  • ecological security
  • structure of ecological security
  • optimization of ecological security

Słowa kluczowe

  • okrętowy silnik spalinowy
  • bezpieczeństwo ekologiczne
  • struktura bezpieczeństwa ekologicznego
  • optymalizacja bezpieczeństwa ekologicznego
Open Access

Reliability Analysis of Helicopter’s Supportingstracture with SSI and SST Models Used / Analiza Niezawodnościowa Struktury Nośnej Śmigłowca Modelami SSI Oraz SST

Published Online: 15 Nov 2013
Page range: 13 - 20

Abstract

Abstract

In this work, algorithms have been used to compare the methods for determining reliability of critical points. Generalized models Stress-Strength- Interference (SSI) and Stress-Strength-Time (SST) have been analyzed. Input to the algorithms, stress and strength were generated by using the Markov chain model based on actual flight records. With this approach methods of determining the reliability of critical points of a helicopter’s structure are justified.

Keywords

  • reliability
  • safety
  • stress-strength-interference
  • stress-strength-time

Słowa kluczowe

  • niezawodność
  • bezpieczeństwo
  • stress-strength-interference
  • stress-strength-time
Open Access

Impact of Infrastructure Type on Reliability of Railway Transportation System / Wpływ Rodzaju Infrastruktury Na Niezawodność Systemu Transportu Szynowego

Published Online: 15 Nov 2013
Page range: 21 - 36

Abstract

Abstract

In this paper, the author’s research work is focused on infrastructure impact on railway transportation system reliability. The aim of research described in the paper is to determine correlation between type (and age) of used infrastructure elements, and number of occurring failures. For this purpose, subsystem of infrastructure and associated with it events, were divided into main groups. Examples of groups are: track, train operation devices (related to operating control points or railway line), level crossings, etc. The second aspect is correlation between type of infrastructure and failure consequences. It is required from transportation that it is possible to achieve the right place at the right time in a safety way. Therefore, from the point of view of transportation process, which is the main goal of transportation system, the most significant failure consequences are delays. Moreover, speaking about reliability and safety of railway transportation system, the question arises what is the relation between number of trains and number of unwanted events?

Keywords

  • railway transportation system
  • infrastructure
  • reliability

Słowa kluczowe

  • transport pasażerski
  • strategia obsługiwania
  • system ekspertowy
  • opóźnienie czasowe
Open Access

The Method of Evaluation of Initial Availability in the Transport System of City Buses / Metoda Oceny Gotowości Początkowej W Systemie Autobusowego Transportu Miejskiego

Published Online: 15 Nov 2013
Page range: 37 - 44

Abstract

Abstract

This paper presents the method of evaluation of initial availability of means of transport to carry out the assigned transport tasks. As an example of research object illustrating the presented deliberations, an actual city bus system from a selected urban agglomeration was used. In systems of this type, the technological objects (means of transport) have to initiate carrying out of the assigned transport tasks at assigned times, according to the adopted timetable. In order to assure the possibility to fulfill the transport tasks at assigned times, the so called time buffer is implemented in order for the necessary service processes to be carried out. In order to evaluate the availability of means of transport in the operational cycle of which the so called time buffer was implemented, it is convenient to use the characteristics describing initial availability of technological objects. Initial availability determines the probability of initiating (activating) the necessary number of technological objects in order to carry out the assigned tasks over a designated time period needed for their preparation and activation. The presented deliberation is illustrated by examples of the results of evaluation of initial availability in the actual tested transport system.

Keywords

  • transport system
  • initial availability
  • city buses

Słowa kluczowe

  • system transportowy
  • gotowość początkowa
  • autobusy miejskie
Open Access

Flight Tests of the Unmanned Helicopter ILX-27 – Some Selected Issues / Zagadnienia Prób W Locie Bezzałogowego Śmigłowca ILX-27

Published Online: 15 Nov 2013
Page range: 45 - 58

Abstract

Abstract

The unmanned helicopter ILX-27 has been designed and developed under the NCBR (in English, NCRD - National Center for Research and Development) project on the “Unmanned helicopter - a special-purpose aerobot” carried out by the Institute of Aviation (IL) and the Air Force Institute of Technology (ITWL), both in Warsaw, and the Military Aviation Works No. 1 J.S.C. in Łódź (WZL Łódź). The helicopter in question is a design initiated and developed solely as an unmanned vehicle in the weight category (MTOW) of 1100 kg. It is the outcome of a complex approach to issues of the helicopter’s structure and aerodynamics, and those of controlling it at different flight phases. From the very beginning, flight tests of this unmanned helicopter have been carried out under the remote-control mode of operation. The paper has been intended to present the outcomes of some selected stages of the project, i.e. the study and tests of groundcontrol components, and the flight tests.

Keywords

  • UAV

Słowa kluczowe

  • BSP
Open Access

Managing DO-178 Compliance with IBM Rational Platform / Zarządzanie Zgodnością Z DO-178 Przy Użyciu Platformy IBM Rational

Published Online: 15 Nov 2013
Page range: 59 - 74

Abstract

Abstract

DO178 is a standard for avionic software for the aerospace industry which can be used as a guidance to determine if the software product will perform reliability in airborne environment. The standard has 5 different certification levels each of which has a certain set of objectives. The certification levels are determined depending on how critical the system or subsystem is. To address DO- 178 objectives, companies need a defined systems and software engineering process that can delineate workflows, inputs, outputs, roles and responsibilities.

The major objectives outlined in the DO-178 standard include;

- Requirements engineering

- Design and development.

- Validation and verification

- Engineering tasks, such as configuration and change management

In this presentation, we will try to explain the main principles of the DO178 standard very briefly and try to give an insight about how the objectives of this standard can be satisfied.

Keywords

  • Safety
  • DO-178
  • requirements engineering
  • systems engineering
  • aerospace

Słowa kluczowe

  • Bezpieczeństwo
  • DO-178
  • ustalenie wymagań
  • projektowanie systemów
  • lotnictwo i kosmonautyka
Open Access

Safety of Machinery – Determination of Performance Level / Bezpieczeństwo Maszyn – Wyznaczanie Poziomu Zapewnienia Bezpieczeństwa

Published Online: 15 Nov 2013
Page range: 75 - 84

Abstract

Abstract

The article presents a method for determining the performance level (PL) on the basis of the PN-EN ISO 13849-1 standard, which is harmonized with the machinery directive 2006/42/EC. The risk assessment and risk reduction criteria, according to PN-EN ISO 12100, were briefly characterized. The focus was put on determining the required performance level PLr on the basis of a risk graph. The method was presented how to use a safety function composed of input-, logicaland execution subsystems. It was demonstrated how to determine the achieved PL for a safety function composed of hardware elements on the basis of a safety category, mean time to dangerous failures (MTTFd), diagnostic coverage (DC), and immunity to common cause failures (CCF).

Keywords

  • machinery directive 2006/42/EC
  • performance level PL
  • safety category
  • mean time to dangerous failures MTTFd
  • diagnostic coverage DC
  • common cause failures CCF

Słowa kluczowe

  • dyrektywa maszynowa 2006/42/WE
  • poziom zapewnienia bezpieczeństwa PL
  • kategorie bezpieczeństwa
  • średni czas pomiędzy niebezpiecznymi uszkodzeniami MTTFd
  • pokrycie diagnostyczne DC
  • uszkodzenia spowodowane wspólną przyczyną CCF
Open Access

Assessment of the Influence of the Human Factor on Safety of the Transportation Process / Ocena Wpływu Czynnika Ludzkiego Na Bezpieczeństwo Procesu Transportowego

Published Online: 15 Nov 2013
Page range: 85 - 96

Abstract

Abstract

Safety of the transport process is a criterion of top priority for a transportation system operation and maintenance. It is of special importance in case of public municipal transportation. Systems of this type operate in specific road conditions: increased intensity of traffic during a day and night, a big number of pedestrians as well as drivers of other vehicles. In such conditions the human factor and its impact on the transport system operation is of key importance. A human can be involved in the transportation system as a driver, passenger, pedestrian, or in another way (cyclist, motorcyclist). Improper behavior of people account for 36% - 46% of road accident causes defined as undesirable events occurred within the space of the road. In this paper there has been mad an attempt to evaluate the transportation system from the point of view of people present in the transportation system and its environment.

Keywords

  • safety working
  • undesirable event

Słowa kluczowe

  • bezpieczeństwo działania
  • zdarzenie niepożądane
Open Access

Assessment of the Impact of Human on Safety of Transportation Systems Operation / Ocena Wpływu Oddziaływań Człowieka Na Bezpieczeństwo Działania Systemu Transportowego

Published Online: 15 Nov 2013
Page range: 97 - 106

Abstract

Abstract

Collisions are inseparably connected with road traffic. Driving a mechanical vehicle requires not only a good knowledge of traffic rules and appropriate skills but also physical and psychical fitness. The road system consists of three basic elements such as: road, vehicle and human. From the point of view of safety of the executed transport process this is the human who plays the most important role in it. They need to have the ability of quick situation estimation and providing proper response to it involving performance of right maneuvers and adjusting them to a given situation. Studying transportation systems it should be remembered that the role of a human plays in them is of different character. They may be drivers, passengers or belong to the environment. Thus, their behavior has a large influence on the transportation system safe functioning including both public and individual transport.

Keywords

  • hazard
  • safety
  • transportation system
  • impact

Słowa kluczowe

  • zagrożenie
  • bezpieczeństwo
  • system transportowy
  • oddziaływanie
Open Access

Emergency Water Supply of Rzeszow / Kryzysowe Zaopatrzenie Rzeszowa W Wodę

Published Online: 15 Nov 2013
Page range: 107 - 116

Abstract

Abstract

In this study the methodology of balancing water needs in a crisis situation was presented. The example was done for city of Rzeszow. The municipal infrastructure: water supply system, sewage system, gas network, heating and energy systems was shortly characterized. The research undertaken in this study was related to Systemic Crisis Management and protection of the inhabitants of the city. The balance of emergency water supply Rzeszow in drinking water for the 29 neighborhoods of the city was shown.

Keywords

  • collective water supply system
  • consumer risk
  • failure

Słowa kluczowe

  • awaryjność sieci wodociągowych
  • zarządzanie kryzysowe
Open Access

Asset Management Supported by Reliability Engineering / Zarządzanie Aktywami, Wspomagane Inżynierią Niezawodności

Published Online: 15 Nov 2013
Page range: 117 - 128

Abstract

Abstract

Reliability methods are widely applied in design and manufacturing. Techniques such as FMEA, Life Data Analysis (aka Weibull analysis), Reliability Growth, System Analysis and Simulation, and FRACAS amongst others, represent the foundation of a solid reliability program. The collection of these tools and the process of deploying them appropriately is known as DFR in the design and manufacturing sector. Some of these tools and methods have also been applied in the maintenance sector (operators vs. manufacturers), but in many cases not as extensively. In this paper we propose a process for deploying different reliability tools and methodologies and we review their applicability in Asset Management. The proposed Asset Performance Management Process is linked to the DMAIC process and was inspired from the very successful DFR process. The proposed APM process lays down the different APM stages and the corresponding activities within each stage that need to be performed in order to achieve and sustain high asset reliability and availability, as well as reduce the operating costs.

Open Access

Different Analysis Procedures for Computing the Reliability of Repairable Systems / Różne Procedury Analizy Dla Obliczania Niezawodności Systemów Podlegających Naprawie

Published Online: 15 Nov 2013
Page range: 129 - 144

Abstract

Abstract

This paper will review the different analysis scenarios that can be used when examining the reliability of repairable systems. Five different methods will be reviewed, specifically:

1) Using the mean value of the times between failure (TBFs) at the system level.

2) Using the distributions of the components of the system and creating a reliability block diagram (RBD).

3) Using the distribution of the times between failure (TBFs) at the system level.

4) Using the system level failure data and fitting the non-homogeneous Poisson process (NHPP) model.

5) Using the system level failure data and fitting the general renewal process (GRP) model.

In the paper, the five different methods will be discussed (brief background), and conclusions about the applicability and accuracy of each method will be given. In addition, this paper can be used to further understand the assumptions behind each analysis method, the data required and the type of results that can be obtained, thus assisting analysts in choosing the most appropriate method.

Open Access

The Reliability Testing of Brick Infrastructure with Operating Modal Analysis / Badanie Niezawodności Infrastruktury Murowej Z Użyciem Operacyjnej Analizy Modalnej

Published Online: 15 Nov 2013
Page range: 145 - 164

Abstract

Abstract

Modal analysis is widely used in the removal of defects caused by vibration of infrastructure, structure modification, updating the analytical model, or the control of the state and is used to monitor the vibration of structures in the aerospace and civil engineering mechanics from early 1990 began to pay close attention to the use of operational modal analysis (OMA) in a study of the existing building structures. In this case, the vibration exciter platforms, buildings, towers, bridges, etc. to force Operating (ambient). Here we measure only the response of the force generated by the environment. OMA is also very attractive for aerospace and mechanical engineering. This article presents the results of the existing building structure (reinforced concrete wall using operational modal analysis software and used to carry out the LMS and visualization of the results of such research.

Keywords

  • operational modal analysis
  • the frequency of vibration
  • stability diagram

Słowa kluczowe

  • operacyjna analiza modalna
  • częśtość drgań
  • diagram stabilizacyjny
Open Access

Exploitation of the CWSS in the Aspect of Belonging to the Critical Infrastructure / Eksploatacja Szzw W Aspekcie Przynależności Do Infrastruktury Krytycznej

Published Online: 15 Nov 2013
Page range: 165 - 172

Abstract

Abstract

CWSS exploitation in terms of belonging to a critical infrastructure is an important issue and requires a detailed analysis. Therefore it is important to develop emergency plans for the supply of drinking water for different crisis situations, as well as detailed analysis of the risk of possible undesirable events in CWSS, in order to develop a comprehensive safety management program of the system. In this work the problems associated with the operation of CWSS in terms of belonging to critical infrastructure were presented. Also the methodology to determine the crisis management time in the WSS, connected with a shortage of drinking water was shown.

Keywords

  • collective water supply system
  • exploitation

Słowa kluczowe

  • system zbiorowego zaopatrzenia w wodę
  • eksploatacja

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