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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 11-12 (2009): Issue 1 (December 2009)

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

Search

5 Articles
Open Access

Workspace Supervising System for Material Handling Devices with Machine Vision Assistance

Published Online: 26 Aug 2010
Page range: 7 - 16

Abstract

Workspace Supervising System for Material Handling Devices with Machine Vision Assistance

The paper is focus on the possibility of the implementation machine vision system for the purposes supervising the transport device workspace interface including operation safety needs. The object of statement is structure of automatic supervising system built on the base material handling devices with open kinematic chain of the Cartesian type based on one CCD device.

Keywords

  • 3D reconstruction
  • laser scanning system
  • machine vision
Open Access

Predicting Risk of Collision for Oil Tankers in the Gulf of Finland

Published Online: 26 Aug 2010
Page range: 17 - 32

Abstract

Predicting Risk of Collision for Oil Tankers in the Gulf of Finland

the Gulf of Finland (GOF) is considered one of the most dense place in the world in terms of marine traffic, and in addition to the Danish Straits it forms the narrowest and shallowest waters in the Baltic Sea. As the volume of shipping in the GOF increases constantly, so does the risk of accidents. This paper presents a model for risk assessment for vessels colliding with emphasis put on tankers. A new adaptation of pre-existent physical model based on molecular collision theory for probability of collision assessment is presented. The consequences of an accident are expressed in the monetary terms, and concern the costs due to an oil spill. Neither loss of humans' life nor structural damages were considered in the presented risk model. The risk that colliding tankers pose are assessed for winter and traffic summer profiles separately.

Keywords

  • risk assessment
  • collision probability
  • maritime traffic safety
  • Gulf of Finland
Open Access

Probabilistic Methods for Assessment of Hazard in Transportation Systems

Published Online: 26 Aug 2010
Page range: 33 - 54

Abstract

Probabilistic Methods for Assessment of Hazard in Transportation Systems

In this paper there has been presented destruction estimation models of construction elements of aircraft in different cases of the state of readiness. The following cases have been examined:

- when a diagnostic parameter indicating the state of readiness exceeds critical point

- when unexpected failure occurs as a result of overload impulse

- when a diagnostic parameter increases and as a result premature failure occurs

- when damage can be indicated with a diagnostic parameter and an unexpected failure may occur.

Differential calculus of Fokker-Planck type has been used in the model creating.

Keywords

  • aircraft
  • failure
  • probability models
Open Access

Robust Algorithms for Predictive Control Under Uncertainty Circumstances of the Model for the Controlled Object

Published Online: 26 Aug 2010
Page range: 55 - 86

Abstract

Robust Algorithms for Predictive Control Under Uncertainty Circumstances of the Model for the Controlled Object

The paper is logically divided into three parts. In the first part the following question is considered. How a standard Model Predictive Control algorithm would perform in a case of model-process discrepancy? It turns out that this discrepancy could lead to control performance deterioration and even to instability of a predictive control system. In the sequel Uncertainty is described as model uncertainty, and then is introduced mathematical description of uncertainty as an analytical uncertainty model. The analytical uncertainty model can be directly used during predictive control algorithm design. In the third part some new ideas and solutions are proposed. First of all, to efficiently cope with negative effects of model-process mismatch the model uncertainty should be taken into account already during predictive control algorithm design. It can be done by the use of the analytical uncertainty model. According to the above solutions like: a fast model selection, dynamical switching sector, and a dual-phase approach to a predictive control algorithm design are presented.

Keywords

  • modelling
  • systems of steering
  • arrangement of control
Open Access

Using the Beta Distribution for Assessment of Availability and Reliability of Technical Transport Facilities

Published Online: 26 Aug 2010
Page range: 87 - 100

Abstract

Using the Beta Distribution for Assessment of Availability and Reliability of Technical Transport Facilities

The paper presents the properties of normalized and generalised beta distributions. Possibility of the use of beta distributions to estimate the reliability and safety of technical transport systems is presented. Suggested is an approach to a method of supplementing the inadequate information with data generated in statistical investigation on the grounds of expert estimates employed for estimating the parameters of beta distributions.

Keywords

  • beta distribution
  • reliability
  • safety
  • transport systems
5 Articles
Open Access

Workspace Supervising System for Material Handling Devices with Machine Vision Assistance

Published Online: 26 Aug 2010
Page range: 7 - 16

Abstract

Workspace Supervising System for Material Handling Devices with Machine Vision Assistance

The paper is focus on the possibility of the implementation machine vision system for the purposes supervising the transport device workspace interface including operation safety needs. The object of statement is structure of automatic supervising system built on the base material handling devices with open kinematic chain of the Cartesian type based on one CCD device.

Keywords

  • 3D reconstruction
  • laser scanning system
  • machine vision
Open Access

Predicting Risk of Collision for Oil Tankers in the Gulf of Finland

Published Online: 26 Aug 2010
Page range: 17 - 32

Abstract

Predicting Risk of Collision for Oil Tankers in the Gulf of Finland

the Gulf of Finland (GOF) is considered one of the most dense place in the world in terms of marine traffic, and in addition to the Danish Straits it forms the narrowest and shallowest waters in the Baltic Sea. As the volume of shipping in the GOF increases constantly, so does the risk of accidents. This paper presents a model for risk assessment for vessels colliding with emphasis put on tankers. A new adaptation of pre-existent physical model based on molecular collision theory for probability of collision assessment is presented. The consequences of an accident are expressed in the monetary terms, and concern the costs due to an oil spill. Neither loss of humans' life nor structural damages were considered in the presented risk model. The risk that colliding tankers pose are assessed for winter and traffic summer profiles separately.

Keywords

  • risk assessment
  • collision probability
  • maritime traffic safety
  • Gulf of Finland
Open Access

Probabilistic Methods for Assessment of Hazard in Transportation Systems

Published Online: 26 Aug 2010
Page range: 33 - 54

Abstract

Probabilistic Methods for Assessment of Hazard in Transportation Systems

In this paper there has been presented destruction estimation models of construction elements of aircraft in different cases of the state of readiness. The following cases have been examined:

- when a diagnostic parameter indicating the state of readiness exceeds critical point

- when unexpected failure occurs as a result of overload impulse

- when a diagnostic parameter increases and as a result premature failure occurs

- when damage can be indicated with a diagnostic parameter and an unexpected failure may occur.

Differential calculus of Fokker-Planck type has been used in the model creating.

Keywords

  • aircraft
  • failure
  • probability models
Open Access

Robust Algorithms for Predictive Control Under Uncertainty Circumstances of the Model for the Controlled Object

Published Online: 26 Aug 2010
Page range: 55 - 86

Abstract

Robust Algorithms for Predictive Control Under Uncertainty Circumstances of the Model for the Controlled Object

The paper is logically divided into three parts. In the first part the following question is considered. How a standard Model Predictive Control algorithm would perform in a case of model-process discrepancy? It turns out that this discrepancy could lead to control performance deterioration and even to instability of a predictive control system. In the sequel Uncertainty is described as model uncertainty, and then is introduced mathematical description of uncertainty as an analytical uncertainty model. The analytical uncertainty model can be directly used during predictive control algorithm design. In the third part some new ideas and solutions are proposed. First of all, to efficiently cope with negative effects of model-process mismatch the model uncertainty should be taken into account already during predictive control algorithm design. It can be done by the use of the analytical uncertainty model. According to the above solutions like: a fast model selection, dynamical switching sector, and a dual-phase approach to a predictive control algorithm design are presented.

Keywords

  • modelling
  • systems of steering
  • arrangement of control
Open Access

Using the Beta Distribution for Assessment of Availability and Reliability of Technical Transport Facilities

Published Online: 26 Aug 2010
Page range: 87 - 100

Abstract

Using the Beta Distribution for Assessment of Availability and Reliability of Technical Transport Facilities

The paper presents the properties of normalized and generalised beta distributions. Possibility of the use of beta distributions to estimate the reliability and safety of technical transport systems is presented. Suggested is an approach to a method of supplementing the inadequate information with data generated in statistical investigation on the grounds of expert estimates employed for estimating the parameters of beta distributions.

Keywords

  • beta distribution
  • reliability
  • safety
  • transport systems

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