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Use of Virtual Reality Technology for Monitoring and Visualization of Selected Operational Charakteristics of Machines and Their Analysis
Augste, Jan ; Mostýn, Vladimír (referee) ; Szabó, István (referee) ; Knoflíček, Radek (advisor)
This dissertation deals with the study of the use of virtual technologies for an analysis of operating characteristics of a machine. Operating characteristics of a machine are parameters that determine the usability of the machine to accomplish a certain task in addition to the specified time and under the certain conditions. These include parameters that can be changed based on customer requirements, for example, the table size and the highest spindle speed to the parameters influenced from the start of the machine design such as positioning accuracy, acceleration value in the axes or consumption. The first part sets out general requirements for visualization of information and these are subsequently verified experimentally in the chapter devoted to the time visualization protocol. This thesis presents the original experiments to determine the basic requirements for visualization of a measured quantity, in this case the feed rate. By verifying usability when displaying these properties on the underlying data showing machine position change, the four basic requirements for visual data processing using immerse virtual reality are validated. A deeper insight into the work with data will enable to analyse more complicated relations within a longer period, greater transparency and clearer outputs of analysis.
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Verification of the State of the Real Production Line using Virtual Reality
Tůma, Zdeněk ; Hajduk, Mikuláš (referee) ; Mostýn, Vladimír (referee) ; Knoflíček, Radek (advisor)
The doctoral thesis focuses on the verification of state real work using virtual reality. Working with the theme dealt with more comprehensively, taking into account the sub-process of the production line design. From the assessment of the actual place where the future production line will be locate, through ergonomic, risk and other analysis. Furthermore, energy consumption of production line (electricity, air consumption, etc.) in real process. In analysing the readiness of virtual reality applications were selected for the following work augmented reality. The biggest advantage of augmented reality is the implementation of a virtual model and the opportunity to deal with the analysis in a real environment, which is particularly beneficial in the case of manufacturing companies. For the composition and optimization of the proposed solution was used a system approach. In the first phase of the solution was made analysis the current state of the work, which created requirements for the design of the new production line. This was followed by the preparation phase of construction in 3D, in this case, Autodesk Inventor. In this phase it was appeared to be advantageous to use the application of virtual reality, as in the design process leads to regular approval procedure of the experts team (management, design, quality, etc.), which puts on the readiness of the team high skills requirements. In this phase, the 3D design of the new production line was inserted into the support augmented reality application and outlined several opportunities to deal ergonomic and risk analysis. The proposed solution also follows the deployment in lean production area in the design phase, where it is possible to solve the analysis process using indirect methods of standard time (MOST). The result of the doctoral thesis is the extension options in designing and analysing production lines and machines in multidisciplinary teams. The proposed solution described in the thesis allows to simplification and reduce the overall time and costs of the overall process from design phase of production line to its commissioning.
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APPROACH TO REDUCING LEAD TIME IN MANUFACTURING SYSTEMS
Hromková, Ivana ; Škopán, Miroslav (referee) ; Šťastný, Jiří (referee) ; Mostýn, Vladimír (referee) ; Knoflíček, Radek (advisor)
Presented PhD thesis aims at development of new methodologies and approaches to reduce lead times in production systems. Therefore the thesis examines in detail the design of new, more comprehensive approaches to shortening lead times. The dissertation describes the methodology of using these approaches in production systems, it is suggested their inclusion in the control structure of production and adequate managerial support for the successful application of these new approaches in the industry is developed. The first part summarizes current knowledge in the field of reducing lead times. The various methods that can be used for reducing lead times are defined and described, from which is selected discrete simulation of manufacturing systems as a suitable method for the purposes of issue development. The next part of this work is therefore devoted to simulation approach to reducing lead times and the factors that affect them, such as processing time, size of the batch, queue lengths, etc. In this part is also discussed the use of information technologies (programming languages, libraries, and software tools) that enable efficient creation of simulation models. The second part is focused on industrial applications implemented to reduce production lead times. Specific simulation analysis deal with, for example, reduction of the lead time for manufacture of surgical instruments, screws, slats, but also transport systems, optimization of production orders input to the production system, the issue of supply, etc. The second part also describes a practical approach to data transfer to / from the simulation model, simulation software connection to the ERP database of enterprise and energy intensity of production. The conclusion summarizes the findings that were detected on the issue of reducing lead times, and within the chosen methodology, simulation of manufacturing processes indicates possible further progress in the research and practical applications.
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Use of Virtual Reality Technology for Monitoring and Visualization of Selected Operational Charakteristics of Machines and Their Analysis
Augste, Jan ; Mostýn, Vladimír (referee) ; Szabó, István (referee) ; Knoflíček, Radek (advisor)
This dissertation deals with the study of the use of virtual technologies for an analysis of operating characteristics of a machine. Operating characteristics of a machine are parameters that determine the usability of the machine to accomplish a certain task in addition to the specified time and under the certain conditions. These include parameters that can be changed based on customer requirements, for example, the table size and the highest spindle speed to the parameters influenced from the start of the machine design such as positioning accuracy, acceleration value in the axes or consumption. The first part sets out general requirements for visualization of information and these are subsequently verified experimentally in the chapter devoted to the time visualization protocol. This thesis presents the original experiments to determine the basic requirements for visualization of a measured quantity, in this case the feed rate. By verifying usability when displaying these properties on the underlying data showing machine position change, the four basic requirements for visual data processing using immerse virtual reality are validated. A deeper insight into the work with data will enable to analyse more complicated relations within a longer period, greater transparency and clearer outputs of analysis.
|
|
|
APPROACH TO REDUCING LEAD TIME IN MANUFACTURING SYSTEMS
Hromková, Ivana ; Škopán, Miroslav (referee) ; Šťastný, Jiří (referee) ; Mostýn, Vladimír (referee) ; Knoflíček, Radek (advisor)
Presented PhD thesis aims at development of new methodologies and approaches to reduce lead times in production systems. Therefore the thesis examines in detail the design of new, more comprehensive approaches to shortening lead times. The dissertation describes the methodology of using these approaches in production systems, it is suggested their inclusion in the control structure of production and adequate managerial support for the successful application of these new approaches in the industry is developed. The first part summarizes current knowledge in the field of reducing lead times. The various methods that can be used for reducing lead times are defined and described, from which is selected discrete simulation of manufacturing systems as a suitable method for the purposes of issue development. The next part of this work is therefore devoted to simulation approach to reducing lead times and the factors that affect them, such as processing time, size of the batch, queue lengths, etc. In this part is also discussed the use of information technologies (programming languages, libraries, and software tools) that enable efficient creation of simulation models. The second part is focused on industrial applications implemented to reduce production lead times. Specific simulation analysis deal with, for example, reduction of the lead time for manufacture of surgical instruments, screws, slats, but also transport systems, optimization of production orders input to the production system, the issue of supply, etc. The second part also describes a practical approach to data transfer to / from the simulation model, simulation software connection to the ERP database of enterprise and energy intensity of production. The conclusion summarizes the findings that were detected on the issue of reducing lead times, and within the chosen methodology, simulation of manufacturing processes indicates possible further progress in the research and practical applications.
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|
|
Verification of the State of the Real Production Line using Virtual Reality
Tůma, Zdeněk ; Hajduk, Mikuláš (referee) ; Mostýn, Vladimír (referee) ; Knoflíček, Radek (advisor)
The doctoral thesis focuses on the verification of state real work using virtual reality. Working with the theme dealt with more comprehensively, taking into account the sub-process of the production line design. From the assessment of the actual place where the future production line will be locate, through ergonomic, risk and other analysis. Furthermore, energy consumption of production line (electricity, air consumption, etc.) in real process. In analysing the readiness of virtual reality applications were selected for the following work augmented reality. The biggest advantage of augmented reality is the implementation of a virtual model and the opportunity to deal with the analysis in a real environment, which is particularly beneficial in the case of manufacturing companies. For the composition and optimization of the proposed solution was used a system approach. In the first phase of the solution was made analysis the current state of the work, which created requirements for the design of the new production line. This was followed by the preparation phase of construction in 3D, in this case, Autodesk Inventor. In this phase it was appeared to be advantageous to use the application of virtual reality, as in the design process leads to regular approval procedure of the experts team (management, design, quality, etc.), which puts on the readiness of the team high skills requirements. In this phase, the 3D design of the new production line was inserted into the support augmented reality application and outlined several opportunities to deal ergonomic and risk analysis. The proposed solution also follows the deployment in lean production area in the design phase, where it is possible to solve the analysis process using indirect methods of standard time (MOST). The result of the doctoral thesis is the extension options in designing and analysing production lines and machines in multidisciplinary teams. The proposed solution described in the thesis allows to simplification and reduce the overall time and costs of the overall process from design phase of production line to its commissioning.
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