Zeitschriften und Ausgaben

Volumen 30 (2022): Heft 50 (June 2022)

Volumen 29 (2021): Heft 49 (September 2021)

Volumen 29 (2021): Heft 48 (June 2021)

Volumen 28 (2020): Heft 47 (September 2020)

Volumen 28 (2020): Heft 46 (June 2020)

Volumen 27 (2019): Heft 45 (September 2019)

Volumen 27 (2019): Heft 44 (June 2019)

Volumen 27 (2019): Heft s1 (December 2019)
Special Number

Volumen 26 (2018): Heft 43 (September 2018)

Volumen 26 (2018): Heft 42 (June 2018)

Volumen 25 (2017): Heft 41 (September 2017)

Volumen 25 (2017): Heft 40 (June 2017)

Volumen 24 (2016): Heft 39 (December 2016)

Volumen 24 (2016): Heft 38 (September 2016)

Volumen 24 (2016): Heft 37 (June 2016)

Volumen 23 (2015): Heft 36 (June 2015)

Volumen 23 (2015): Heft s1 (August 2015)
Heft Title: Special number

Volumen 22 (2014): Heft 341 (December 2014)
Special Heft

Volumen 22 (2014): Heft 35 (December 2014)

Volumen 22 (2014): Heft 34 (June 2014)

Volumen 21 (2013): Heft Special-Heft (June 2013)

Volumen 21 (2013): Heft 33 (December 2013)

Volumen 20 (2012): Heft Special-Number (December 2012)
CO-MAT-TECH 2012

Volumen 20 (2012): Heft 32 (June 2012)

Volumen 19 (2011): Heft 31 (December 2011)

Volumen 19 (2011): Heft 30 (June 2011)

Volumen 18 (2010): Heft 29 (December 2010)

Volumen 18 (2010): Heft 28 (June 2010)

Zeitschriftendaten
Format
Zeitschrift
eISSN
1338-0532
Erstveröffentlichung
03 Mar 2011
Erscheinungsweise
2 Hefte pro Jahr
Sprachen
Englisch

Suche

Volumen 29 (2021): Heft 49 (September 2021)

Zeitschriftendaten
Format
Zeitschrift
eISSN
1338-0532
Erstveröffentlichung
03 Mar 2011
Erscheinungsweise
2 Hefte pro Jahr
Sprachen
Englisch

Suche

11 Artikel
access type Uneingeschränkter Zugang

Use of Blockchain Mechanisms in PLC Control and Safety Critical Processes

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 1 - 6

Zusammenfassung

Abstract

In a few past years, a lot of cyber-attacks on industrial systems were accomplished. The main point of vulnerability of industrial control systems (ICS) is their connection to the Internet. Standard ICS rely on local solutions; however, with the revolution in the shape of Industry 4.0 concept, there are only a few industrial sectors with no connection to the global network. Some researchers have revealed critical vulnerability of the control systems. In this paper, we briefly summarize the current situation, and introduce our solution to the check of changes in PLC via other nodes in industrial network. The way how to do it is possible through using a checksum of actual code, and comparing with the checksums stored in other nodes.

Schlüsselwörter

  • Blockchain
  • data integrity
  • ICS
  • security
  • Industry 4.0
  • PLC
access type Uneingeschränkter Zugang

Virtual Control Object for Siemens Logic Controllers and Online PLC Education

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 7 - 14

Zusammenfassung

Abstract

This paper deals with the possibility of creating virtual C # models connectable to a virtual PLC of Siemens. The models will lead to the improvement and simplification of the online PLC education. Hardware solutions cost a lot of money, while using a software version of PLC leads to cheaper simulations. Paper presents the design and implementation of the virtual models, including the ways of the interconnection with PLCSIM, visualization and finally demonstration for the selected virtual model.

Schlüsselwörter

  • Siemens PLC
  • virtual object
  • online education
  • control
access type Uneingeschränkter Zugang

Application of Industrial Computer Tomography to Determine Wood Porosity

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 15 - 23

Zusammenfassung

Abstract

The main objective of this research was to analyse the limitations of iCT - industrial computer tomography for measuring the wood pores characteristics as a new non-destructive method which is primarily intended to measure and inspect complete components primarily made of plastics or light metal. The subject matter of this paper are wood samples of paulownia (Paulownia tomentosa) and ash (Fraxinus excelsior) before and after thermal treatment. Porosity, pore volume and distribution of pores on the wood samples before and after the heat treatment were measured by iCT Metrotom 1500. The total porosity of the samples before thermal treatment was 5.28 % (paulownia) and 14.90 % (ash), while after thermal treatment, porosity increased to 9.50 % (paulownia) and to 30.78 % (ash). Changes in the porosity of the samples before and after heat treatment show an increase in porosity of 3.87 % (paulownia) and 15.88 % (ash).

Schlüsselwörter

  • Computer tomography
  • fire prevention
  • porosity
  • wood
  • X-ray
access type Uneingeschränkter Zugang

Increasing the Efficiency of a Robotic Cell Using Simulation

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 24 - 35

Zusammenfassung

Abstract

The paper deals with the possibilities of increasing the efficiency of a robotic cell. The robot assembly station is a part of a multi-robotic workplace capable of performing solitary operations. The complete production cycle of the cell is subjected to a thorough analysis. Deficiencies, having a direct impact on cell efficiency, are identified. These shortcomings include redundant movements of the robotic arm, the absence of an inspection mechanism for the presence of assembly parts, and inefficient instructions of the production cycle algorithm. The identified deficiencies are eliminated using the CIROS simulation tool. The result of the adjustments is a global 11.4% increase in the efficiency of the robotic cell in terms of time performance.

Schlüsselwörter

  • Robotic cell
  • increase efficiency
  • simulation
access type Uneingeschränkter Zugang

Reliability Assessment of the Systems with Simple Interconnections

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 36 - 42

Zusammenfassung

Abstract

The paper deals with determining the final value of simple systems reliability. Simple systems, the systems with simple interconnections, can be divided into a sequence of series and/or parallel subsystems. The paper presents the basic functional relationships used to assess the reliability of simple systems, however, they are also essential for understanding more complex systems. The paper graphically shows and analyzes the final reliability of the systems depending on the arrangement of subsystems, and also those depending on the number of subsystems.

Schlüsselwörter

  • Reliability function
  • series and parallel system
  • failure state and failure-free state
access type Uneingeschränkter Zugang

Controlling a Small Mobile 3-Pi Robot Movement in a Maze Via the Neural Network Using Back-Propagation Learning Method

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 43 - 50

Zusammenfassung

Abstract

The contribution is focused on technical implementation of controlling a small mobile 3Pi robot in a maze along a predefined guide line where the control of the acquired direction of the robot’s movement was provided by a neural network. The weights (memory) of the neuron were calculated using a feedforward neural network learning via the Back-propagation method. This article fastens on the paper by the title “Movement control of a small mobile 3-pi robot in a maze using artificial neural network”, where Hebbian learning was used for a single-layer neural network. The reflectance infra-red sensors performed as input sensors. The result of this research is the evaluation based on the experiments that served to compare different training sets with the learning methods when moving a mobile robot in a maze.

Schlüsselwörter

  • Mobile robot´s control subsystem
  • navigation
  • neural network
  • maze solving robotic vehicle
  • back-propagation
access type Uneingeschränkter Zugang

Case Study of Building a Digital Twin for a Production System

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 51 - 58

Zusammenfassung

Abstract

As the term of Industry 4.0 becomes more and more relevant with each passing day, it is up to researchers and companies to find solutions to integrating all the technologies it covers. One of those technologies, even though not highly developed, is simulation and building Cyber-Physical Systems for gathering data and improving the production processes. In the research described in this paper, we focused on integrating production data with simulation models in order to make the process of understanding and learning about complex production systems as simple and as quick as possible. This paper contains three sections. The first one introduces the theoretical fundamentals of our research. The second one focuses on the methods used to create a digital model of production system. The final one discusses the results of the conducted experiments, and their impact on further research.

Schlüsselwörter

  • Digital Twin
  • Simulation
  • Witness
  • AFB Factory
access type Uneingeschränkter Zugang

Industry Communication Based on TCP/IP Protocol

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 59 - 66

Zusammenfassung

Abstract

The design of control systems needs to ensure communication between multiple PLCs or external IoT devices. Furthermore, there are several ways of communication between them. This article dealt with the PLC communication based on TCP/IP protocol, and compared several communication options between two PLCs of the S7-300 and S7-1200 series connected using Profinet with a solution built in C# connected to the PLC via an OPC server. We used MODBUS TCP, TCON, and PUT/GET program blocks for comparison. We transmitted a digital Boolean data type and an analogue value of the integer data type via Profinet to read data from the S7-300 PLC and send data to the S7-1200. We compared the programming instructions standardly used as a client/server PLC programming with a Windows Forms application, and evaluated the advantages and disadvantages of this solution even when using external IoT devices. The solution was applied and successfully tested for communication between PLC S7-1200 and Nvidia Jetson Nano. We wrote program instructions for PLC in Siemens Tia Portal V15.

Schlüsselwörter

  • PLC
  • TCP/IP
  • communication
access type Uneingeschränkter Zugang

An Approach to Automated Programming of Industrial Robots Based on Graphic Data

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 67 - 77

Zusammenfassung

Abstract

The article contains the design and implementation of a system for automatic program generation for an industrial robot, based on the graphical input recorded by camera. The content is divided into two parts. The first section deals with processing the visual data acquired from an external source to appropriate form, using edge identification and transformation from raster to vector image. The second part deals with the automatic program generation for industrial robot. The article describes different possible approaches to solution. The selected way of solution was implemented in real environment in a chosen programming language. The final section of the article presents the results of experiments, together with the overall evaluation of the results.

Schlüsselwörter

  • Robot
  • Programming
  • Automation
  • Picture processing
  • Algorithm
access type Uneingeschränkter Zugang

A Two Wheel Self-Balancing Vehicle

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 78 - 93

Zusammenfassung

Abstract

This paper deals with the development of the equation of motion and practical implementation of low cost two-wheel self-balancing model of a Segway transporter. The experimental model of cart was designed and made under this study. Nonlinear equations of motion of real model and linearized model were derived. To develop the mathematical model, Matlab/Simulink was applied. The mechanical part was implemented into Simulink, and a DC motor was considered as a linear system. The real model was tested for its balance by implementation of a control algorithm consisting of a complementary filter and PID algorithm on an Arduino development board with peripheral devices. The fully functional self-balancing model was used as a demonstration in the teaching process of the Mechatronics courses.

Schlüsselwörter

  • Segway model
  • equations of motion
  • self-balancing
  • PID control
access type Uneingeschränkter Zugang

Analysis of Lifelong Learning in Industrial Enterprises in the Border Regions of the Slovak Republic and the Czech Republic

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 94 - 102

Zusammenfassung

Abstract

Lifelong learning is a conscious learning process with the aim of acquiring knowledge, skills and competences throughout an individual’s life. For lifelong learning to be successful, learning activities must meet market requirements. Correct skills of employees and a serious approach to lifelong learning are now being viewed as essential meet the skills and workforce needs of the future. Well-adjusted education system improves quality of life and sense of self-esteem of employees, besides it brings benefits of competitiveness for the whole company. The key goal of the article was to identify the current needs of lifelong learning in industrial enterprises in technical fields. The conducted questionnaire survey was focused on the companies in the border regions of the Slovak Republic (the Trnava, Trenčín and Žilina regions) and the Czech Republic (the South Moravian, Zlín and Moravian-Silesian regions). The research was aimed primarily at the companies in the machinery and automotive industries. Based on the results of the questionnaire, the requirements for the training focused on technical areas such as: materials engineering, mechanical engineering, computer aided design and production preparation, automation and control of technological processes and mechatronic systems, production quality, IT security and others were defined.

Schlüsselwörter

  • Lifelong learning
  • Machinery industry
  • Automotive industry
11 Artikel
access type Uneingeschränkter Zugang

Use of Blockchain Mechanisms in PLC Control and Safety Critical Processes

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 1 - 6

Zusammenfassung

Abstract

In a few past years, a lot of cyber-attacks on industrial systems were accomplished. The main point of vulnerability of industrial control systems (ICS) is their connection to the Internet. Standard ICS rely on local solutions; however, with the revolution in the shape of Industry 4.0 concept, there are only a few industrial sectors with no connection to the global network. Some researchers have revealed critical vulnerability of the control systems. In this paper, we briefly summarize the current situation, and introduce our solution to the check of changes in PLC via other nodes in industrial network. The way how to do it is possible through using a checksum of actual code, and comparing with the checksums stored in other nodes.

Schlüsselwörter

  • Blockchain
  • data integrity
  • ICS
  • security
  • Industry 4.0
  • PLC
access type Uneingeschränkter Zugang

Virtual Control Object for Siemens Logic Controllers and Online PLC Education

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 7 - 14

Zusammenfassung

Abstract

This paper deals with the possibility of creating virtual C # models connectable to a virtual PLC of Siemens. The models will lead to the improvement and simplification of the online PLC education. Hardware solutions cost a lot of money, while using a software version of PLC leads to cheaper simulations. Paper presents the design and implementation of the virtual models, including the ways of the interconnection with PLCSIM, visualization and finally demonstration for the selected virtual model.

Schlüsselwörter

  • Siemens PLC
  • virtual object
  • online education
  • control
access type Uneingeschränkter Zugang

Application of Industrial Computer Tomography to Determine Wood Porosity

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 15 - 23

Zusammenfassung

Abstract

The main objective of this research was to analyse the limitations of iCT - industrial computer tomography for measuring the wood pores characteristics as a new non-destructive method which is primarily intended to measure and inspect complete components primarily made of plastics or light metal. The subject matter of this paper are wood samples of paulownia (Paulownia tomentosa) and ash (Fraxinus excelsior) before and after thermal treatment. Porosity, pore volume and distribution of pores on the wood samples before and after the heat treatment were measured by iCT Metrotom 1500. The total porosity of the samples before thermal treatment was 5.28 % (paulownia) and 14.90 % (ash), while after thermal treatment, porosity increased to 9.50 % (paulownia) and to 30.78 % (ash). Changes in the porosity of the samples before and after heat treatment show an increase in porosity of 3.87 % (paulownia) and 15.88 % (ash).

Schlüsselwörter

  • Computer tomography
  • fire prevention
  • porosity
  • wood
  • X-ray
access type Uneingeschränkter Zugang

Increasing the Efficiency of a Robotic Cell Using Simulation

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 24 - 35

Zusammenfassung

Abstract

The paper deals with the possibilities of increasing the efficiency of a robotic cell. The robot assembly station is a part of a multi-robotic workplace capable of performing solitary operations. The complete production cycle of the cell is subjected to a thorough analysis. Deficiencies, having a direct impact on cell efficiency, are identified. These shortcomings include redundant movements of the robotic arm, the absence of an inspection mechanism for the presence of assembly parts, and inefficient instructions of the production cycle algorithm. The identified deficiencies are eliminated using the CIROS simulation tool. The result of the adjustments is a global 11.4% increase in the efficiency of the robotic cell in terms of time performance.

Schlüsselwörter

  • Robotic cell
  • increase efficiency
  • simulation
access type Uneingeschränkter Zugang

Reliability Assessment of the Systems with Simple Interconnections

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 36 - 42

Zusammenfassung

Abstract

The paper deals with determining the final value of simple systems reliability. Simple systems, the systems with simple interconnections, can be divided into a sequence of series and/or parallel subsystems. The paper presents the basic functional relationships used to assess the reliability of simple systems, however, they are also essential for understanding more complex systems. The paper graphically shows and analyzes the final reliability of the systems depending on the arrangement of subsystems, and also those depending on the number of subsystems.

Schlüsselwörter

  • Reliability function
  • series and parallel system
  • failure state and failure-free state
access type Uneingeschränkter Zugang

Controlling a Small Mobile 3-Pi Robot Movement in a Maze Via the Neural Network Using Back-Propagation Learning Method

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 43 - 50

Zusammenfassung

Abstract

The contribution is focused on technical implementation of controlling a small mobile 3Pi robot in a maze along a predefined guide line where the control of the acquired direction of the robot’s movement was provided by a neural network. The weights (memory) of the neuron were calculated using a feedforward neural network learning via the Back-propagation method. This article fastens on the paper by the title “Movement control of a small mobile 3-pi robot in a maze using artificial neural network”, where Hebbian learning was used for a single-layer neural network. The reflectance infra-red sensors performed as input sensors. The result of this research is the evaluation based on the experiments that served to compare different training sets with the learning methods when moving a mobile robot in a maze.

Schlüsselwörter

  • Mobile robot´s control subsystem
  • navigation
  • neural network
  • maze solving robotic vehicle
  • back-propagation
access type Uneingeschränkter Zugang

Case Study of Building a Digital Twin for a Production System

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 51 - 58

Zusammenfassung

Abstract

As the term of Industry 4.0 becomes more and more relevant with each passing day, it is up to researchers and companies to find solutions to integrating all the technologies it covers. One of those technologies, even though not highly developed, is simulation and building Cyber-Physical Systems for gathering data and improving the production processes. In the research described in this paper, we focused on integrating production data with simulation models in order to make the process of understanding and learning about complex production systems as simple and as quick as possible. This paper contains three sections. The first one introduces the theoretical fundamentals of our research. The second one focuses on the methods used to create a digital model of production system. The final one discusses the results of the conducted experiments, and their impact on further research.

Schlüsselwörter

  • Digital Twin
  • Simulation
  • Witness
  • AFB Factory
access type Uneingeschränkter Zugang

Industry Communication Based on TCP/IP Protocol

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 59 - 66

Zusammenfassung

Abstract

The design of control systems needs to ensure communication between multiple PLCs or external IoT devices. Furthermore, there are several ways of communication between them. This article dealt with the PLC communication based on TCP/IP protocol, and compared several communication options between two PLCs of the S7-300 and S7-1200 series connected using Profinet with a solution built in C# connected to the PLC via an OPC server. We used MODBUS TCP, TCON, and PUT/GET program blocks for comparison. We transmitted a digital Boolean data type and an analogue value of the integer data type via Profinet to read data from the S7-300 PLC and send data to the S7-1200. We compared the programming instructions standardly used as a client/server PLC programming with a Windows Forms application, and evaluated the advantages and disadvantages of this solution even when using external IoT devices. The solution was applied and successfully tested for communication between PLC S7-1200 and Nvidia Jetson Nano. We wrote program instructions for PLC in Siemens Tia Portal V15.

Schlüsselwörter

  • PLC
  • TCP/IP
  • communication
access type Uneingeschränkter Zugang

An Approach to Automated Programming of Industrial Robots Based on Graphic Data

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 67 - 77

Zusammenfassung

Abstract

The article contains the design and implementation of a system for automatic program generation for an industrial robot, based on the graphical input recorded by camera. The content is divided into two parts. The first section deals with processing the visual data acquired from an external source to appropriate form, using edge identification and transformation from raster to vector image. The second part deals with the automatic program generation for industrial robot. The article describes different possible approaches to solution. The selected way of solution was implemented in real environment in a chosen programming language. The final section of the article presents the results of experiments, together with the overall evaluation of the results.

Schlüsselwörter

  • Robot
  • Programming
  • Automation
  • Picture processing
  • Algorithm
access type Uneingeschränkter Zugang

A Two Wheel Self-Balancing Vehicle

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 78 - 93

Zusammenfassung

Abstract

This paper deals with the development of the equation of motion and practical implementation of low cost two-wheel self-balancing model of a Segway transporter. The experimental model of cart was designed and made under this study. Nonlinear equations of motion of real model and linearized model were derived. To develop the mathematical model, Matlab/Simulink was applied. The mechanical part was implemented into Simulink, and a DC motor was considered as a linear system. The real model was tested for its balance by implementation of a control algorithm consisting of a complementary filter and PID algorithm on an Arduino development board with peripheral devices. The fully functional self-balancing model was used as a demonstration in the teaching process of the Mechatronics courses.

Schlüsselwörter

  • Segway model
  • equations of motion
  • self-balancing
  • PID control
access type Uneingeschränkter Zugang

Analysis of Lifelong Learning in Industrial Enterprises in the Border Regions of the Slovak Republic and the Czech Republic

Online veröffentlicht: 07 Dec 2021
Seitenbereich: 94 - 102

Zusammenfassung

Abstract

Lifelong learning is a conscious learning process with the aim of acquiring knowledge, skills and competences throughout an individual’s life. For lifelong learning to be successful, learning activities must meet market requirements. Correct skills of employees and a serious approach to lifelong learning are now being viewed as essential meet the skills and workforce needs of the future. Well-adjusted education system improves quality of life and sense of self-esteem of employees, besides it brings benefits of competitiveness for the whole company. The key goal of the article was to identify the current needs of lifelong learning in industrial enterprises in technical fields. The conducted questionnaire survey was focused on the companies in the border regions of the Slovak Republic (the Trnava, Trenčín and Žilina regions) and the Czech Republic (the South Moravian, Zlín and Moravian-Silesian regions). The research was aimed primarily at the companies in the machinery and automotive industries. Based on the results of the questionnaire, the requirements for the training focused on technical areas such as: materials engineering, mechanical engineering, computer aided design and production preparation, automation and control of technological processes and mechatronic systems, production quality, IT security and others were defined.

Schlüsselwörter

  • Lifelong learning
  • Machinery industry
  • Automotive industry

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