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Analysis of methods for impact sensing in structures with piezoelectric elements
Široký, Václav ; Hadraba, Petr (referee) ; Hadaš, Zdeněk (advisor)
This thesis deals with the design and implementation of impact monitoring in structures with piezoelectric elements. In the theoretical part are presented methods of structure health monitoring with emphasis on impact monitoring and its use in aerospace applications. Furthermore, the concept of creating a cyber-physical system using metamaterial structures with implemented piezoelectric elements is presented. In the practical part are used several experimental platforms, for which is built a data acquisition system from NI company. The processing of the measured data is carried out in the LabVIEW development environment. In it, force response models are created, which are used to evaluate the position and strength of the impact in real time in a stand-alone application.
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Smart bearings
Junek, Jaroslav ; Polnický, Vojtěch (referee) ; Hartl, Martin (advisor)
This thesis deals with the issue of smart bearing, which can be used to refine and determine the condition of the bearing. Due to its advantageous availability of the cyber-physical system as a suitable apparatus for industrial use. The links and connections within this system are mentioned here. The following is a summary of commercially available smart bearings. It is complemented by patent solutions and scientific studies, which could point to future developments in this area.
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Compensation of Linear Encoder of Maching Center
Štěpánek, Vojtěch ; Šooš, Ĺubomír (referee) ; Suchánek, Rostislav (referee) ; Marek, Jiří (advisor)
A CNC machine tool is a complex mechatronic system whose behaviour is influenced by a change in temperature gradient. Nowadays, we could state that under certain conditions it is a cyber-physical system. From this point of view, there are two approaches to solve this problem. One direction solves the whole machine using a suitable method as a whole. Models are often very complex and their reliability is often questi-onable. This work deals with the decomposition of the machine using a systems approach, with the intention of finding the dependencies between the geometric error of the on-axis position accuracy and the temperature gradient. Then, using a suitable virtual model, predict the evolution of the temperature error and based on this prediction, make actionable interventions in the machine tool control system to eliminate the on-axis homing error as much as possible. One of the basic building blocks of the machine tool in terms of positioning is the linear encoder, which acts as a direct feedback member of the axis position control. Therefore, this publication is mainly devoted to the thermal behaviour of the linear encoder.
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Digital Twin Design of the Machine Tool
Kroupa, Jiří ; Holubek,, Radovan (referee) ; Marek, Jiří (referee) ; Singule, Vladislav (advisor)
This thesis focuses on the design of a digital twin of machine tools. The main objective is to design a digital twin of a machine tool. A survey in the field of digital twins shows an ambiguous view of the concept of digital twin. Therefore, it is proceeded to formulate a systematic definition of digital twin and its main components. The definition is then expanded to include a design methodology for the digital twin. This methodology is applied in the second part of the thesis to the design of a digital twin of a UVSSR Cell manufacturing cell. As a result, it is possible to design a digital twin representing a tool for solving three technical problems which are monitoring the state of the technical system, prediction of the positioning accuracy error caused by temperature changes and user support in the operation of the technical system. Finally, the software and hardware part of the proposed digital twin is implemented together with the developed communication interface integrating the user through virtual and augmented reality.
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Uncertainty-Aware Self-Adaptive Cyber-Physical Systems
Al Ali, Rima ; Bulej, Lubomír (advisor) ; Pelliccione, Patrizio (referee) ; Bühnová, Barbora (referee)
Cyber-physical systems (CPS) need to be designed to deal with various forms of uncertainty associated with data contributing to the system's knowledge of the environment. Dealing with uncertainty requires adopting an appropriate model, which then allows making the right decisions and carrying out the right actions (possibly affecting the environment) based on imperfect information. However, choosing and incorporating a suitable model into CPS design is difficult, because it requires identifying the kind of uncertainty at hand as well as knowledge of suitable models and their application to dealing with the uncertainty. While inspiration can be found in other CPS designs, the details of dealing with uncertainty in another CPS can be confounded by domain-specific terminology, context, and requirements. To make this aspect of CPS design less daunting, we aim at providing an overview of approaches dealing with uncertainty in the design of CPS targeting collective behavior. To this end, we present a systematic review of relevant scientific projects with industrial leadership and synthesis of relations between system features, the kinds of uncertainty, and methods used to deal with it. The results provide an overview of uncertainty across different domains and challenges and reason about a guide for...
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Smart bearings
Junek, Jaroslav ; Polnický, Vojtěch (referee) ; Hartl, Martin (advisor)
This thesis deals with the issue of smart bearing, which can be used to refine and determine the condition of the bearing. Due to its advantageous availability of the cyber-physical system as a suitable apparatus for industrial use. The links and connections within this system are mentioned here. The following is a summary of commercially available smart bearings. It is complemented by patent solutions and scientific studies, which could point to future developments in this area.
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Industry 4.0 as an example of a top-down vs. horizontal Europeanization
Nováková, Denisa ; Young, Mitchell (advisor) ; Tomalová, Eliška (referee)
Industry 4.0 is a new generation of manufacturing based on robotics, automation and new trends in ICT. It was for the first time introduced at the Hannover Fair in 2011 and has been part of the European, German and Czech discourse since then. This Master thesis deals with the topic of Industry 4.0 in the Czech Republic and assesses to what extent the concept is coming to the Czech Republic as a result of a top-down (EU) or horizontal (Germany) Europeanization. The thesis came to the conclusion that there are two perceptions of Industry 4.0. One is narrow and deals with the industrial policy and the other is broad and deals with society wide implications of the fourth industrial revolution. The debate about Industry 4.0 in the Czech Republic is mainly a result of a horizontal Europeanization based on bilateral agreements and close cooperation between Germany and the Czech Republic in the area of R&D, innovations and business. However, the top-down Europeanization cannot be neglected as the EU provides much broader context where Industry 4.0 is taking place. Moreover, Industry 4.0 gave a new impetus to the digital economy and society in the Czech Republic. It turned into agenda 4.0 and moved forward the debate about digital skills.
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Industry 4.0 in Czech Republic
Dvořák, Miroslav ; Lorenc, Miroslav (advisor) ; Jirsák, Petr (referee)
The thesis reviews the current situation related to the Industry 4.0 and puts it into context. In the first part of the thesis, there is an introduction to the current economic situation and the major challenges. The concept and vision of Industry 4.0 is introduced together with the world's leading initiatives and examples of Industry 4.0 technologies in manufacturing processes presented by tech leaders. The thesis also includes examples of readiness models and simulated calculation ROCE. The finding of the thesis is that, although the very concept of Industry 4.0 is not well known, digitization and automation of production continues and both are considered a necessity. Interviews with experts from the business practice in the Czech Republic introduces key opportunities and challenges arising from new technologies and when they might become the new standard.
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