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

Search

Volume 43 (2017): Issue 1 (October 2017)

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

Search

22 Articles
Open Access

The New Approach to Identification of Parametric and Momentary Damages on the Basis of Lindeberg – Levy’s Model

Published Online: 30 Apr 2018
Page range: 5 - 21

Abstract

Abstract

The new approach for the assessment of reliability condition of the exploited system, based on the appropriate analysis of changes in the current parameters of technical condition aRb and the regulation condition aRc, determined from the compressed condition equation (1 and 2). While analyzing the course of momentary parameters for technical condition aRb and the regulation condition aRc, it was observed that the parametric and momentary damages can be identified on the basis of quantitative relations between momentary threshold value dpr and corresponding momentary permissible value dpr dop, which are calculated from equation (7, 8, 9) resulting from Lindeberg–Levy’s theorem. It is assumed that the damages are prevailing, when for the moment θi: >dpri> dpr dopi. With the number of damages (damage map), reliability parameters for each moment of exploitation of technical object (before the catastrophic damages will occur) can be determined. Parametric damages (expected lifetime E(T) and standard deviation of expected lifetime σE(T) provides the reasonable information for the appropriate planning of the servicing of exploitative objects.

Keywords

  • parametric damages
  • momentary damages
  • technical condition parameter
  • regulation condition parameter
  • reliability characteristics
Open Access

The Power of Prediction Process in the Tests of Ammunition Elements

Published Online: 30 Apr 2018
Page range: 23 - 48

Abstract

Abstract

The author reminds the definition of coefficient determination and the idea of the largest credibility method in the introduction of the article. Firstly, the aspect of new coefficient defined by McFadden as a power of prediction process and called pseudo was characterized. The similar type of coefficients proposed by other known statisticians were described. Moreover, the hierarchic way of building the logistic regress model, through adding next variables to adjust an estimated model to empirical data was introduced. Four kinds of variables were analysed, whose adjustment influence on the estimated logistic regress model was affected by the quantity of inconsistences which appeared in the data result. The calculations of parameter made by the McFadden’s, Nagelkerke’s and Cox-Snell’s formulas were presented. Concise conclusions relating to the estimated logistic regress model on the basis of empirical data from tested MD-8 fuses type were introduced in the end of the article and this model was compared to values of coefficient counted in the article. It was stated, that McFadden’s pseudo parameter is most often used and it defines the power of prediction process.

Keywords

  • coefficient of determination (R-squared)
  • logistic regress
  • credibility
  • variable
  • power of prediction process
Open Access

Areas of Civil Aviation Hazards

Published Online: 30 Apr 2018
Page range: 49 - 68

Abstract

Abstract

Risk management is one of the most important tools of modern systemic approach to process modeling. Generally, it may be described as a system of interrelated actions and decisions aimed at integration and coordination of processes in the organization, in cooperation with the external parties. The aim of management is therefore to improve the proficiency, effectiveness and efficiency of the operation and - in the case of risk management arising from the transport processes - to improve flight safety. The publication describes a proposal of risk management method in air transport including analysis of areas threats to civil air operations.

Keywords

  • safety
  • risk analysis
  • sources of hazards
  • air transport
Open Access

The Concept of Risk Tolerability Matrix Determination for Aeronautical Data and Information Chain

Published Online: 30 Apr 2018
Page range: 69 - 94

Abstract

Abstract

This article is a continuation of the Authors’ study on the ways to ensure the quality and safety of aeronautical data and information in the entire process (considered as the supply chain) of those data and information creation, collection, processing and publication. In its content attention was paid to air traffic proactive safety management aa well as the need to manage identified incompatibilities. The risk assessment and tolerability matrices arising from ICAO specifications were presented, and then on their bases, the concept of such matrices determination for aeronautical data and information chain was developed. In addition, the criteria for consequences’/effects’ of incompatibilities appearance assessment related strictly to air transport were elaborated. In the summary directions for further analysis were pointed out, leading to carrying out a full risk assessment analysis of the discussed chain with the use of the FMEA method.

Keywords

  • aeronautical data and information chain
  • risk tolerability matrix
Open Access

An Intelligent System of Supervision and Safety of Flight Operations

Published Online: 30 Apr 2018
Page range: 95 - 112

Abstract

Abstract

The paper presents the functionality and applicability of AeroSafetyShow Demonstrator+PL (ASSD+PL). Software was invented and developed by a scientific consortium between Żelazny6 Wojciech Krupa company and Poznan University of Technology. Project was co-financed by the European Union and the National Centre for Research and Development. ASSD+PL is an intelligent system, which allows to increase the safety of flight operations by conducting surveillance in the real time. This system is the first controlling software which offering such a wide range of functionalities.

Keywords

  • safety
  • general aviation
  • supervision system
Open Access

Methodology for Processing of the Judge Rates in the Context of Aerobatic Competitions

Published Online: 30 Apr 2018
Page range: 113 - 123

Abstract

Abstract

Aerobatics is a sport whose specificity significantly differs from other air disciplines. Aerial figures performed in a confined space (referred to as a ‘box’) are a challenge not only for the pilots, but also for the jury evaluating the competition. Subjective scores of the judges are converted by a dedicated FPS (Fair Play System) system. FPS is the basis for the ACRO scoring software (Aerobatic Contest Result Organizer) used to convert and publish the results of aerobatic contests organized worldwide. Due to the multi-aspect nature of data processing, the system is not always understood by the players. The paper attempts to explain various stages of calculations and explore issues associated with standard judging. This aspect is extremely important, not only for the competing pilots, but also for the judges and the viewers.

Keywords

  • aerobatics
  • data processing software
  • judging the aerobatics competition
Open Access

Synthesis of a Multi-Valued Diagnostic Model Using the Wigner-Ville Transformation

Published Online: 30 Apr 2018
Page range: 125 - 144

Abstract

Abstract

The paper presents a method of creating a multi-valued diagnostic model using Wigner-Ville transformation of vibroacoustic signals measured on a real object. The result is a transformation matrix in which the rows correspond to the frequencies F and the column - times T of successive samples of the signal. Integer coding involves assigning values to the coefficient specified range of real numbers one integer. After applying the coding a multi-valued diagnostic model is obtained. The model describes the relationship between a set of significant frequencies, rms values of Wigner-Ville transform’s coefficients, and a set of diagnosed object failures.

Keywords

  • multi-valued diagnostic model
  • Wigner-Ville transform
  • signal parameterization
Open Access

Scopus as a Meta-Source of Knowledge About Turbine Blade Damage in the Aspect of Designing an Expert Diagnostic System

Published Online: 30 Apr 2018
Page range: 145 - 162

Abstract

Abstract

The paper presents the concept of using the Scopus as a meta-source of knowledge about turbine blade damage in the aspect of designing an expert diagnostic system. In the first stage, the search was limited to the scope of the general term “turbine engine”, followed by a refinement of the search terms within the area of rotary machines components degradation including their construction, manufacturing, repair technology and diagnostic methods. By using EndNote software in semi-automatic mode, specific issue groups have been designated. In the second stage, a query focused on the main causes of turbine blade damage and diagnostic methods was proposed. Using the Scopus-based search and archiving tools, one can systematically update the knowledge.

Keywords

  • turbine engine
  • turbine blade
  • diagnostic expert system
Open Access

The Simulation of the Use of Personal Protective Equipment in Investigation of Smart ID Card System Efficiency

Published Online: 30 Apr 2018
Page range: 163 - 178

Abstract

Abstract

Developed in the company TENVIRK Sp z o.o. system called SMARTD ID CARD advantages of location and time registration systems. The data obtained in this system allow you to, among other, monitoring whether employees consistently use personal protective equipment. The purpose of the research was to verify the effectiveness of mechanisms to detect whether the man used personal protection. To this end, simulates a human movement using the robot. Comparison of the Pearson, Kendall’s Tau, Spearman’s and BiSerial correlation detection algorithms have been done. Test results confirmed that the system is highly effective in detecting the use of personal protective equipment.

Keywords

  • safety at work
  • working time registration
  • localisation systems
Open Access

Testing the Catastrophic Recorder Resistance Against the Impact of Catastrophic Factors

Published Online: 30 Apr 2018
Page range: 179 - 222

Abstract

Abstract

The subject of the research was a catastrophic recorder of the S2-3a system for recording flight parameters, developed at the Air Force Institute of Technology. The article discusses tests of catastrophic recorders’ resilience to factors present at aircraft accidents. The document specifying the requirements for catastrophic recorders of flight parameters includes the defence standard: NO-16-A200, and the European standard: EuroCAE ED-112. According to NO-16-A200 and ED-112 standards, the protective unit should be resistant to: g-forces existing during crash, puncture, compression, fire, underwater pressure and aggressive liquids.

Keywords

  • catastrophic recorder
  • resistance tests
Open Access

Transport Possibilities at the Section of Lower Vistula

Published Online: 30 Apr 2018
Page range: 223 - 240

Abstract

Abstract

The article presents information about transport possibilities at the section of Lower Vistula. Article provides classification of inland waterways in Poland according to the regulations of the Council of Ministers from May 7th, 2002. It also includes information regarding inland port locations and fleet parameters adjusted to the IV class of waterways. In addition, the use of the Lower Vistula for the carrying goods is mentioned. The information contained in the article are based on the research conducted during the INWAPO project.

Keywords

  • Lower Vistula
  • inland navigation
  • infrastructure point
  • capacity
Open Access

Model of System Safety Related to Climate-Weather Change Process

Published Online: 30 Apr 2018
Page range: 241 - 248

Abstract

Abstract

The article is devoted to the climate-weather change impact on the critical infrastructure safety. A general safety analytical model of the technical system related to the climate-weather change process in its operating area is proposed. It is the integrated model of the complex technical system safety, linking its multistate safety model and the model of the climate-weather change process at its operating area. The conditional safety functions at the climate-weather particular states and the unconditional safety function of the complex system at changing in time climate-weather conditions, the mean value and the variance of the system unconditional lifetime and other safety indicators are defined in general for any critical infrastructure.

Keywords

  • safety
  • critical infrastructure
  • climate-weather change process
Open Access

Research of Pneumatic Distributors for Launcher of Unmanned Aerial Vehicle (UAV)

Published Online: 30 Apr 2018
Page range: 249 - 276

Abstract

Abstract

The test stand for investigations of flow characteristics of pneumatic distributor has been presented in this paper. This test stand has been composed as requirements include in standard PN-92/M-73763. The results of experimental and simulation investigations for standard five ways and two position pneumatic distributor have been presented. In simulations have been used CFD of SolidWorks Flow Simulation application. Flow characteristic of pneumatic distributor is necessary for design process of special pneumatic circuits of UAV launchers. CFD methods allow specify flow characteristics. Simulation research allow effective pneumatic components modification, whose used of special pneumatic circuits of UAV launchers. Results of experimental and simulation investigations were analyzed and compared.

Keywords

  • pneumatic launcher
  • pneumatic distributor
  • simulation investigations
Open Access

Hydroperoxides Formation in Jet Fuels Coming from Different Production Processes in Simulated Fuel System of Modern Aircraft

Published Online: 30 Apr 2018
Page range: 277 - 299

Abstract

Abstract

The paper presents issues related to the process of thermal degradation of jet fuel. This process is of a different nature depending on temperature and time, in which the fuel is subjected to thermal action. The standard method for testing the jet fuel thermal stability seems to be insufficient, therefore, the conduct of the research on a dedicated test rig was taken in this paper. The assessment of the fuel degradation process was carried out on the basis of determination of hydroperoxide and acid numbers as signs of the occurred process. The article has been prepared within the research project No. 2011/01/D/ST8/06567 funded by the National Science Centre in Poland.

Keywords

  • jet fuel
  • thermal stability
  • non-standard method
  • hydroperoxide number
Open Access

Protection of a Control System of a Technical Object from Negative Influence of Human Factors by Using Steganographic Methods

Published Online: 30 Apr 2018
Page range: 301 - 312

Abstract

Abstract

It is difficult to avoid influence of human factor on work of complex technical objects, so safety systems of technical objects have to contain tools of analysis and withstanding possible negative influences from the side of service personnel (SP). To withstand negative influence of human factors on work of a complex technical object, this paper proposes to use steganographic methods of hiding certain information. For that, information is hidden from some members of service personnel (SP), for which the corresponding information is negative. Besides, certain information is hidden from some SP members that can block its transfer in the system of controlling the management process. Methods of implementing the steganographic data concealment are to a great degree dependent on the type of a digital environment that is considered to be used. Introducing the information fragments in a graphic digital environment is performed so that they would be invisible in this environment. Thus, it is necessary for values of parameters that characterize the invisibility degree to be consistent with parameters used to describe the environment itself.

Keywords

  • steganographic methods
  • human factors
  • steganosystem
  • complex technical object
  • information hiding
  • graphic image
  • steganosystem parameters
Open Access

Human Factor in the Tasks of Ensuring Functioning Safety of Complex Technical Objects

Published Online: 30 Apr 2018
Page range: 313 - 320

Abstract

Abstract

The paper describes research of problems related to detecting a negative influence of human factors on technologic process in complex technical objects that can occur from the side of maintenance staff. Analysis is performed of psychological aspects of occurrence of human factors, as well as of interconnections between psychological and technical aspects, related to occurrence of human factors, that can lead to malfunctions in technical objects.

Keywords

  • emotional image
  • maintenance staff
  • human factor
  • ecral analysis
  • diagnostics
Open Access

Reliability Analysis of a Type B Power Supply Used in a Intrusion Detection System (IDS)

Published Online: 30 Apr 2018
Page range: 321 - 342

Abstract

Abstract

One of the electrical security systems used to protect critical infrastructure facilities is the intrusion detection system. Its purpose is to increase the safety level for the persons and property within the protected facility. The paper presents consideration regarding the reliability analysis of a type B power supply used in an intrusion detection system. This takes into account the guidelines regarding the analysed power supply system included in the standard “PN-EN 50131-1:2009: Alarm systems - Intrusion detection systems - Part 1: System requirements”. Next, a reliability analysis was performed, which enables the determination of the readiness indicator value. The conduction of further analyses of IDS power supply systems, though of distributed structures, is planned in subsequent studies regarding this issue.

Keywords

  • reliability
  • power supply
  • intrusion and hold-up systems
Open Access

Impact of Frame Architecture on Road Traffic Safety Management

Published Online: 30 Apr 2018
Page range: 343 - 352

Abstract

Abstract

The article presents issues associated with ITS and their influence on the safety and efficiency of road traffic. Each system to be implemented at a specified location is thoroughly analysed and defined. The architecture defining process utilised the FRAME architecture based on an example of a service concerning the transfer of information on environmental conditions.

Keywords

  • ITS
  • intelligent transport systems
  • road traffic safety
  • FRAME architecture
Open Access

Analysis and Evaluation of the Influence of Selected its Services on Road Traffic Safety and Efficiency

Published Online: 30 Apr 2018
Page range: 353 - 364

Abstract

Abstract

The implementation of Intelligent Transport Systems (ITS) nowadays is associated with a strong need to solve problems related to the high accident rate, as well as low efficiency of transportation process management. The topic of this paper is the characterisation of selected intelligent transport services and the determination of their influence on road traffic safety and efficiency. Two services implemented within the framework of the National Traffic Management System in Poland were distinguished, namely: transmitting information to drivers and incident detection. A general analysis of the relationship between the functioning of ITS services and safety on national roads, as well as traffic efficiency therein was conducted.

Keywords

  • ITS
  • road information for drivers
  • incident detection
  • safety
  • road traffic efficiency
Open Access

The Renewal Process Generated By Return Times of Semi-Markov Process in Reliability Models

Published Online: 30 Apr 2018
Page range: 365 - 380

Abstract

Abstract

The renewal process generated by the return times of semi-Markov process to a given state is considered in the paper. The return time to a state j and also a first passage time from a given state i to the state j of semi-Markov process are basic concepts that are used to determine this process. The systems of equations for distributions, expectations and secondond moments of these random variables are presented. Theorem concerning the asymptotic distribution of the considered renewal process is presented in this article. Moreover an illustrative example from the reliability theory is presented in the paper.

Keywords

  • Renewal process
  • semi-Markov model
Open Access

A System Approach for Optimizing of Parameters of the Proposed Maritime Container Port in Świnoujście

Published Online: 30 Apr 2018
Page range: 381 - 392

Abstract

Abstract

The article presents specially developed methods for optimizing of parameters of the proposed maritime container port in Świnoujście with planned transshipment capacity of 1.5-million TEU intended for handling container vessels up to 400m length. The methods have been developed based on a system approach for the proposed maritime waterways.

Keywords

  • maritime container port
  • maritime waterways
Open Access

Fuzzy Methods in Risk Estimation of the Ship System Failures Based on the Expert Judgments

Published Online: 30 Apr 2018
Page range: 393 - 403

Abstract

Abstract

The paper presents the fuzzy methods in failure modes and effects analysis (FMEA) for estimating the risk of the ship system failures based on the expert judgments. It provides an appropriate representation of the uncertain and ambiguous notions expressed in the natural language. An example of fuzzy intuitionistic FMEA analysis is illustrated in estimating the risk of tanker system failures. The results show that the proposed method in comparison with the traditional FMEA is more effective and useful in estimating the risk of ship system failures based on the expert opinions, available in such cases.

Keywords

  • Intuitionistic fuzzy set
  • risk estimation
  • expert judgment
  • ship system failure
22 Articles
Open Access

The New Approach to Identification of Parametric and Momentary Damages on the Basis of Lindeberg – Levy’s Model

Published Online: 30 Apr 2018
Page range: 5 - 21

Abstract

Abstract

The new approach for the assessment of reliability condition of the exploited system, based on the appropriate analysis of changes in the current parameters of technical condition aRb and the regulation condition aRc, determined from the compressed condition equation (1 and 2). While analyzing the course of momentary parameters for technical condition aRb and the regulation condition aRc, it was observed that the parametric and momentary damages can be identified on the basis of quantitative relations between momentary threshold value dpr and corresponding momentary permissible value dpr dop, which are calculated from equation (7, 8, 9) resulting from Lindeberg–Levy’s theorem. It is assumed that the damages are prevailing, when for the moment θi: >dpri> dpr dopi. With the number of damages (damage map), reliability parameters for each moment of exploitation of technical object (before the catastrophic damages will occur) can be determined. Parametric damages (expected lifetime E(T) and standard deviation of expected lifetime σE(T) provides the reasonable information for the appropriate planning of the servicing of exploitative objects.

Keywords

  • parametric damages
  • momentary damages
  • technical condition parameter
  • regulation condition parameter
  • reliability characteristics
Open Access

The Power of Prediction Process in the Tests of Ammunition Elements

Published Online: 30 Apr 2018
Page range: 23 - 48

Abstract

Abstract

The author reminds the definition of coefficient determination and the idea of the largest credibility method in the introduction of the article. Firstly, the aspect of new coefficient defined by McFadden as a power of prediction process and called pseudo was characterized. The similar type of coefficients proposed by other known statisticians were described. Moreover, the hierarchic way of building the logistic regress model, through adding next variables to adjust an estimated model to empirical data was introduced. Four kinds of variables were analysed, whose adjustment influence on the estimated logistic regress model was affected by the quantity of inconsistences which appeared in the data result. The calculations of parameter made by the McFadden’s, Nagelkerke’s and Cox-Snell’s formulas were presented. Concise conclusions relating to the estimated logistic regress model on the basis of empirical data from tested MD-8 fuses type were introduced in the end of the article and this model was compared to values of coefficient counted in the article. It was stated, that McFadden’s pseudo parameter is most often used and it defines the power of prediction process.

Keywords

  • coefficient of determination (R-squared)
  • logistic regress
  • credibility
  • variable
  • power of prediction process
Open Access

Areas of Civil Aviation Hazards

Published Online: 30 Apr 2018
Page range: 49 - 68

Abstract

Abstract

Risk management is one of the most important tools of modern systemic approach to process modeling. Generally, it may be described as a system of interrelated actions and decisions aimed at integration and coordination of processes in the organization, in cooperation with the external parties. The aim of management is therefore to improve the proficiency, effectiveness and efficiency of the operation and - in the case of risk management arising from the transport processes - to improve flight safety. The publication describes a proposal of risk management method in air transport including analysis of areas threats to civil air operations.

Keywords

  • safety
  • risk analysis
  • sources of hazards
  • air transport
Open Access

The Concept of Risk Tolerability Matrix Determination for Aeronautical Data and Information Chain

Published Online: 30 Apr 2018
Page range: 69 - 94

Abstract

Abstract

This article is a continuation of the Authors’ study on the ways to ensure the quality and safety of aeronautical data and information in the entire process (considered as the supply chain) of those data and information creation, collection, processing and publication. In its content attention was paid to air traffic proactive safety management aa well as the need to manage identified incompatibilities. The risk assessment and tolerability matrices arising from ICAO specifications were presented, and then on their bases, the concept of such matrices determination for aeronautical data and information chain was developed. In addition, the criteria for consequences’/effects’ of incompatibilities appearance assessment related strictly to air transport were elaborated. In the summary directions for further analysis were pointed out, leading to carrying out a full risk assessment analysis of the discussed chain with the use of the FMEA method.

Keywords

  • aeronautical data and information chain
  • risk tolerability matrix
Open Access

An Intelligent System of Supervision and Safety of Flight Operations

Published Online: 30 Apr 2018
Page range: 95 - 112

Abstract

Abstract

The paper presents the functionality and applicability of AeroSafetyShow Demonstrator+PL (ASSD+PL). Software was invented and developed by a scientific consortium between Żelazny6 Wojciech Krupa company and Poznan University of Technology. Project was co-financed by the European Union and the National Centre for Research and Development. ASSD+PL is an intelligent system, which allows to increase the safety of flight operations by conducting surveillance in the real time. This system is the first controlling software which offering such a wide range of functionalities.

Keywords

  • safety
  • general aviation
  • supervision system
Open Access

Methodology for Processing of the Judge Rates in the Context of Aerobatic Competitions

Published Online: 30 Apr 2018
Page range: 113 - 123

Abstract

Abstract

Aerobatics is a sport whose specificity significantly differs from other air disciplines. Aerial figures performed in a confined space (referred to as a ‘box’) are a challenge not only for the pilots, but also for the jury evaluating the competition. Subjective scores of the judges are converted by a dedicated FPS (Fair Play System) system. FPS is the basis for the ACRO scoring software (Aerobatic Contest Result Organizer) used to convert and publish the results of aerobatic contests organized worldwide. Due to the multi-aspect nature of data processing, the system is not always understood by the players. The paper attempts to explain various stages of calculations and explore issues associated with standard judging. This aspect is extremely important, not only for the competing pilots, but also for the judges and the viewers.

Keywords

  • aerobatics
  • data processing software
  • judging the aerobatics competition
Open Access

Synthesis of a Multi-Valued Diagnostic Model Using the Wigner-Ville Transformation

Published Online: 30 Apr 2018
Page range: 125 - 144

Abstract

Abstract

The paper presents a method of creating a multi-valued diagnostic model using Wigner-Ville transformation of vibroacoustic signals measured on a real object. The result is a transformation matrix in which the rows correspond to the frequencies F and the column - times T of successive samples of the signal. Integer coding involves assigning values to the coefficient specified range of real numbers one integer. After applying the coding a multi-valued diagnostic model is obtained. The model describes the relationship between a set of significant frequencies, rms values of Wigner-Ville transform’s coefficients, and a set of diagnosed object failures.

Keywords

  • multi-valued diagnostic model
  • Wigner-Ville transform
  • signal parameterization
Open Access

Scopus as a Meta-Source of Knowledge About Turbine Blade Damage in the Aspect of Designing an Expert Diagnostic System

Published Online: 30 Apr 2018
Page range: 145 - 162

Abstract

Abstract

The paper presents the concept of using the Scopus as a meta-source of knowledge about turbine blade damage in the aspect of designing an expert diagnostic system. In the first stage, the search was limited to the scope of the general term “turbine engine”, followed by a refinement of the search terms within the area of rotary machines components degradation including their construction, manufacturing, repair technology and diagnostic methods. By using EndNote software in semi-automatic mode, specific issue groups have been designated. In the second stage, a query focused on the main causes of turbine blade damage and diagnostic methods was proposed. Using the Scopus-based search and archiving tools, one can systematically update the knowledge.

Keywords

  • turbine engine
  • turbine blade
  • diagnostic expert system
Open Access

The Simulation of the Use of Personal Protective Equipment in Investigation of Smart ID Card System Efficiency

Published Online: 30 Apr 2018
Page range: 163 - 178

Abstract

Abstract

Developed in the company TENVIRK Sp z o.o. system called SMARTD ID CARD advantages of location and time registration systems. The data obtained in this system allow you to, among other, monitoring whether employees consistently use personal protective equipment. The purpose of the research was to verify the effectiveness of mechanisms to detect whether the man used personal protection. To this end, simulates a human movement using the robot. Comparison of the Pearson, Kendall’s Tau, Spearman’s and BiSerial correlation detection algorithms have been done. Test results confirmed that the system is highly effective in detecting the use of personal protective equipment.

Keywords

  • safety at work
  • working time registration
  • localisation systems
Open Access

Testing the Catastrophic Recorder Resistance Against the Impact of Catastrophic Factors

Published Online: 30 Apr 2018
Page range: 179 - 222

Abstract

Abstract

The subject of the research was a catastrophic recorder of the S2-3a system for recording flight parameters, developed at the Air Force Institute of Technology. The article discusses tests of catastrophic recorders’ resilience to factors present at aircraft accidents. The document specifying the requirements for catastrophic recorders of flight parameters includes the defence standard: NO-16-A200, and the European standard: EuroCAE ED-112. According to NO-16-A200 and ED-112 standards, the protective unit should be resistant to: g-forces existing during crash, puncture, compression, fire, underwater pressure and aggressive liquids.

Keywords

  • catastrophic recorder
  • resistance tests
Open Access

Transport Possibilities at the Section of Lower Vistula

Published Online: 30 Apr 2018
Page range: 223 - 240

Abstract

Abstract

The article presents information about transport possibilities at the section of Lower Vistula. Article provides classification of inland waterways in Poland according to the regulations of the Council of Ministers from May 7th, 2002. It also includes information regarding inland port locations and fleet parameters adjusted to the IV class of waterways. In addition, the use of the Lower Vistula for the carrying goods is mentioned. The information contained in the article are based on the research conducted during the INWAPO project.

Keywords

  • Lower Vistula
  • inland navigation
  • infrastructure point
  • capacity
Open Access

Model of System Safety Related to Climate-Weather Change Process

Published Online: 30 Apr 2018
Page range: 241 - 248

Abstract

Abstract

The article is devoted to the climate-weather change impact on the critical infrastructure safety. A general safety analytical model of the technical system related to the climate-weather change process in its operating area is proposed. It is the integrated model of the complex technical system safety, linking its multistate safety model and the model of the climate-weather change process at its operating area. The conditional safety functions at the climate-weather particular states and the unconditional safety function of the complex system at changing in time climate-weather conditions, the mean value and the variance of the system unconditional lifetime and other safety indicators are defined in general for any critical infrastructure.

Keywords

  • safety
  • critical infrastructure
  • climate-weather change process
Open Access

Research of Pneumatic Distributors for Launcher of Unmanned Aerial Vehicle (UAV)

Published Online: 30 Apr 2018
Page range: 249 - 276

Abstract

Abstract

The test stand for investigations of flow characteristics of pneumatic distributor has been presented in this paper. This test stand has been composed as requirements include in standard PN-92/M-73763. The results of experimental and simulation investigations for standard five ways and two position pneumatic distributor have been presented. In simulations have been used CFD of SolidWorks Flow Simulation application. Flow characteristic of pneumatic distributor is necessary for design process of special pneumatic circuits of UAV launchers. CFD methods allow specify flow characteristics. Simulation research allow effective pneumatic components modification, whose used of special pneumatic circuits of UAV launchers. Results of experimental and simulation investigations were analyzed and compared.

Keywords

  • pneumatic launcher
  • pneumatic distributor
  • simulation investigations
Open Access

Hydroperoxides Formation in Jet Fuels Coming from Different Production Processes in Simulated Fuel System of Modern Aircraft

Published Online: 30 Apr 2018
Page range: 277 - 299

Abstract

Abstract

The paper presents issues related to the process of thermal degradation of jet fuel. This process is of a different nature depending on temperature and time, in which the fuel is subjected to thermal action. The standard method for testing the jet fuel thermal stability seems to be insufficient, therefore, the conduct of the research on a dedicated test rig was taken in this paper. The assessment of the fuel degradation process was carried out on the basis of determination of hydroperoxide and acid numbers as signs of the occurred process. The article has been prepared within the research project No. 2011/01/D/ST8/06567 funded by the National Science Centre in Poland.

Keywords

  • jet fuel
  • thermal stability
  • non-standard method
  • hydroperoxide number
Open Access

Protection of a Control System of a Technical Object from Negative Influence of Human Factors by Using Steganographic Methods

Published Online: 30 Apr 2018
Page range: 301 - 312

Abstract

Abstract

It is difficult to avoid influence of human factor on work of complex technical objects, so safety systems of technical objects have to contain tools of analysis and withstanding possible negative influences from the side of service personnel (SP). To withstand negative influence of human factors on work of a complex technical object, this paper proposes to use steganographic methods of hiding certain information. For that, information is hidden from some members of service personnel (SP), for which the corresponding information is negative. Besides, certain information is hidden from some SP members that can block its transfer in the system of controlling the management process. Methods of implementing the steganographic data concealment are to a great degree dependent on the type of a digital environment that is considered to be used. Introducing the information fragments in a graphic digital environment is performed so that they would be invisible in this environment. Thus, it is necessary for values of parameters that characterize the invisibility degree to be consistent with parameters used to describe the environment itself.

Keywords

  • steganographic methods
  • human factors
  • steganosystem
  • complex technical object
  • information hiding
  • graphic image
  • steganosystem parameters
Open Access

Human Factor in the Tasks of Ensuring Functioning Safety of Complex Technical Objects

Published Online: 30 Apr 2018
Page range: 313 - 320

Abstract

Abstract

The paper describes research of problems related to detecting a negative influence of human factors on technologic process in complex technical objects that can occur from the side of maintenance staff. Analysis is performed of psychological aspects of occurrence of human factors, as well as of interconnections between psychological and technical aspects, related to occurrence of human factors, that can lead to malfunctions in technical objects.

Keywords

  • emotional image
  • maintenance staff
  • human factor
  • ecral analysis
  • diagnostics
Open Access

Reliability Analysis of a Type B Power Supply Used in a Intrusion Detection System (IDS)

Published Online: 30 Apr 2018
Page range: 321 - 342

Abstract

Abstract

One of the electrical security systems used to protect critical infrastructure facilities is the intrusion detection system. Its purpose is to increase the safety level for the persons and property within the protected facility. The paper presents consideration regarding the reliability analysis of a type B power supply used in an intrusion detection system. This takes into account the guidelines regarding the analysed power supply system included in the standard “PN-EN 50131-1:2009: Alarm systems - Intrusion detection systems - Part 1: System requirements”. Next, a reliability analysis was performed, which enables the determination of the readiness indicator value. The conduction of further analyses of IDS power supply systems, though of distributed structures, is planned in subsequent studies regarding this issue.

Keywords

  • reliability
  • power supply
  • intrusion and hold-up systems
Open Access

Impact of Frame Architecture on Road Traffic Safety Management

Published Online: 30 Apr 2018
Page range: 343 - 352

Abstract

Abstract

The article presents issues associated with ITS and their influence on the safety and efficiency of road traffic. Each system to be implemented at a specified location is thoroughly analysed and defined. The architecture defining process utilised the FRAME architecture based on an example of a service concerning the transfer of information on environmental conditions.

Keywords

  • ITS
  • intelligent transport systems
  • road traffic safety
  • FRAME architecture
Open Access

Analysis and Evaluation of the Influence of Selected its Services on Road Traffic Safety and Efficiency

Published Online: 30 Apr 2018
Page range: 353 - 364

Abstract

Abstract

The implementation of Intelligent Transport Systems (ITS) nowadays is associated with a strong need to solve problems related to the high accident rate, as well as low efficiency of transportation process management. The topic of this paper is the characterisation of selected intelligent transport services and the determination of their influence on road traffic safety and efficiency. Two services implemented within the framework of the National Traffic Management System in Poland were distinguished, namely: transmitting information to drivers and incident detection. A general analysis of the relationship between the functioning of ITS services and safety on national roads, as well as traffic efficiency therein was conducted.

Keywords

  • ITS
  • road information for drivers
  • incident detection
  • safety
  • road traffic efficiency
Open Access

The Renewal Process Generated By Return Times of Semi-Markov Process in Reliability Models

Published Online: 30 Apr 2018
Page range: 365 - 380

Abstract

Abstract

The renewal process generated by the return times of semi-Markov process to a given state is considered in the paper. The return time to a state j and also a first passage time from a given state i to the state j of semi-Markov process are basic concepts that are used to determine this process. The systems of equations for distributions, expectations and secondond moments of these random variables are presented. Theorem concerning the asymptotic distribution of the considered renewal process is presented in this article. Moreover an illustrative example from the reliability theory is presented in the paper.

Keywords

  • Renewal process
  • semi-Markov model
Open Access

A System Approach for Optimizing of Parameters of the Proposed Maritime Container Port in Świnoujście

Published Online: 30 Apr 2018
Page range: 381 - 392

Abstract

Abstract

The article presents specially developed methods for optimizing of parameters of the proposed maritime container port in Świnoujście with planned transshipment capacity of 1.5-million TEU intended for handling container vessels up to 400m length. The methods have been developed based on a system approach for the proposed maritime waterways.

Keywords

  • maritime container port
  • maritime waterways
Open Access

Fuzzy Methods in Risk Estimation of the Ship System Failures Based on the Expert Judgments

Published Online: 30 Apr 2018
Page range: 393 - 403

Abstract

Abstract

The paper presents the fuzzy methods in failure modes and effects analysis (FMEA) for estimating the risk of the ship system failures based on the expert judgments. It provides an appropriate representation of the uncertain and ambiguous notions expressed in the natural language. An example of fuzzy intuitionistic FMEA analysis is illustrated in estimating the risk of tanker system failures. The results show that the proposed method in comparison with the traditional FMEA is more effective and useful in estimating the risk of ship system failures based on the expert opinions, available in such cases.

Keywords

  • Intuitionistic fuzzy set
  • risk estimation
  • expert judgment
  • ship system failure

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