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Risk Modelling in Engineering Applications
Konečný, Antonín ; Karpíšek, Zdeněk (referee) ; Popela, Pavel (advisor)
The diploma thesis focuses on risk modelling in engineering applications. The knowledge obtained from statistical methods of operational research, specifically regression analysis, is used. Electrical quantities measured on the stator winding of an electrical machine (generator) are analyzed. Regression analysis and statistical hypothesis testing is performed in Statgraphics software. The success results of the regression analysis for risk reduction are documented in detail and the regression curves are visualized in graphs. Conclusions and recommendations for each generator, as well as general ones, are formulated.
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Multiparametric generator diagnostics
Buchtová, Blanka ; Nahodil, Petr (referee) ; Hammer, Miloš (advisor)
The thesis is focused on multiparametric diagnostic of generators at the Dukovany nuclear power plant. One generator was chosen for the thesis and it was examined especially from the practical point of view. The thesis describes current state of the issue with focus on noise diagnostics, vibrodiagnostics and electrodiagnostics. The emphasis is on the system approach of the solution. In the practical part an experiment is designed, described and evaluated. Attention is paid to the conclusions of the performed vibrodiagnostics and noise diagnostics. Data sets are evaluated separately and the relationship between the two diagnostic methods is analyzed. Furthermore, the data set from electrodiagnostics is evaluated and dependencies of electrical diagnostic quantities on other quantities are described. Trends in electrical diagnostic quantities are also monitored. Conclusions and recommendations are formulated at the end of the thesis. It is stated that using multiparametric diagnostics to assess the status of generators in power plants is still in its beginning and that the conclusions of the submitted thesis will contribute to the developmnet in this area.
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Use of VAG-COM PROFI Diagnostic Kit in Forensic Engineering
Wertheim, Adolf ; Tylšar, Vladimír (referee) ; Panáček, Vladimír (advisor)
The thesis deals with possibilities of application of VAG-COM PROFI diagnostic kit in forensic engineering. After defining a theoretical basis, according to possibilities of evaluation of technical condition of a vehicle, the thesis is focused on applying diagnostic methods using above mentioned diagnostic kit. With respect to opportunities of identification of driving parameters, possibility of acceleration measurement and estimation of engine power are introduced. Describing of methodology and making the final statement are contained in the thesis as a part of every single measurement.
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Data processing from the online diagnostic system
Cirhanová, Iva ; Jankových, Róbert (referee) ; Zuth, Daniel (advisor)
This master thesis deals with data processing from an online diagnostic system. The theoretical part of the work is divided into three chapters, the first deals with technical diagnostics as such, there are basic terminology and concepts associated with technical diagnostics, such as diagnostic methods, tools, models and signals. The second part is focused on diagnostic systems and their division. This chapter also provides some examples of online diagnostic monitoring systems from three different companies. The last chapter of the theoretical part is devoted to the description of the possibilities of data collection from diagnostic systems, ie. description of communication buses and protocols. The practical part of this work focuses on creating an application for data collection and visualization.
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Predictive system maintenance machines in engineering practice
Rázgová, Benedikta ; Řezníčková, Hana (referee) ; Hammer, Miloš (advisor)
This bachelor thesis deals with the predictive maintenance of machines in engineering practice. The first part of the thesis deals with problems theoretically, there is described generally maintenance and methods of technical diagnostics of machine tools. The practical part focused on the application of one selected method, vibrodiagnostics. Part of the work is the vibrodiagnosis evaluation of the milling center, the design of the predictive maintenance system and other recommendations for SMC Industrial Automation CZ s.r.o. Vyškov.
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Maintenance and diagnostics of machine tools focusing on vibrodiagnostics, electrodiagnostics and tribodiagnostics
Houška, Jan ; Řezníčková, Hana (referee) ; Hammer, Miloš (advisor)
Master‘s thesis deals with maintenance and related technical diagnostics of machine tools. Diagnostics methods on which is the thesis focused are vibrodiagnostics, tribodiagnostics and electrodiagnostics. Work includes design of diagnostic system and measurement of vibration and electrical parameters of the machining center. Based on given results from data evaluation, further steps in predictive maintenance and usage of technical diagnostics for machine tools are recommended. Within tribotechnical diagnostics, the thesis is based on evaluation of long-term monitoring of process liquid status, which was used in several machining machines. A procedure for the measurement of selected parameters is proposed and periodical liquid status checks are established.
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Methods of technical diagnostics - vibrodiagnostics
Soldán, Josef ; Hammer, Miloš (referee) ; Hájková, Alena (advisor)
The bachelor's thesis deals with technical diagnostics, especially vibrodiagnostics. The work first describes technical diagnostics in general, namely its means and methods, including vibrodiagnostics. The mentioned method is the focus of the presented bachelor's thesis, therefore its description forms the majority of the theoretical part. As part of this work, the vibrations of the electric motor were measured, which were subsequently evaluated according to the standard.
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Diagnostics of the state of the machine/machine components with the help of fuzzy sets
Horák, Roman ; Zuth, Daniel (referee) ; Marada, Tomáš (advisor)
Diploma thesis deals with the use of fuzzy logic in the field of technical diagnostics. The thesis is divided into theoretical and practical parts. The theoretical part describes technical diagnostics, fuzzy logic and genetic algorithm. The theoretical part is followed by a practical part in which fuzzy logic is tested on the Iris dataset and then the acquired knowledge is applied to a technical dataset evaluating machine fault conditions. At the end of the chapters of both datasets, the results are summarized and evaluated. The last chapter of the practical part is devoted to the description of the developed scripts in software Matlab 2022b. Part of the work are attachments in which the created FIS models and written scripts are stored.
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Vibration analysis using modern online systems
Marek, Vojtěch ; Poliščuk, Radek (referee) ; Hammer, Miloš (advisor)
The diploma thesis solves the issue of vibration analysis using on-line systems. A model of a rotating machine was programmed for implementation, on which the data was subsequently measured. The solution was the analysis of experimental problems for the unbalance of the machine and the determination of the exact defect on the bearing. Different diagnostic methods and environments of the CMS X-Tools analysis application were used to obtain the results. The main result is a functional monitoring system that permanently monitors the condition of the machine and, if necessary, the operator is able to determine the exact failure of the device after analyzing the obtained data. By introducing on-line monitoring systems, major downtime and associated financial losses can be avoided.
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