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On-line diagnostic monitoring systems for vibration of machines
Cirhanová, Iva ; Prostredník, Daniel (referee) ; Hammer, Miloš (advisor)
The bachelor thesis deals with diagnostic monitoring systems of machine vibration. First of all, a technical diagnosis with a focus on diagnostic methods, means and diagnostic systems is generally described. Special attention is paid to vibrodiagnostics and termodi-agnostics. In the next part of the thesis there are on-line diagnostic monitoring systems, their parameters and their use in technical practice. Emphasis is placed on systems from SKF, ADASH and ifm electronic. The systems are compared and the economic aspect is briefly outlined. In the bachelor thesis is also evaluated.
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Predictive diagnostics and maintenance of Stäubli robots
Lojková, Pavlína ; Řezníčková, Hana (referee) ; Hammer, Miloš (advisor)
The bachelor thesis deals with the predictive diagnostics and maintenance of Stäubli robots in Bosch Diesel s.r.o. in Jihlava. The parameters monitored so far are described and other suitable ones are proposed for this purpose. The design of the escalation model, its enhancement and visualization is realized. The bachelor thesis also deals with the evaluation of the problem solved.
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Bearings Error Frequencies
Životský, Petr ; Pata, Vladimír (referee) ; Zuth, Daniel (advisor)
This dissertation deals with error frequences of bearing because the bearing is part of every rotary machine. Certain type of bearing and caused defect is being compared with error frequences which are acquired by experiment. Various kinds of measurement which are more or less applicable in use are being described. Further the dissertation deals with other possible ways of detection error frequences for particular defects of bearing.
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Non-contact temperature measurement
Sládek, Vojtěch ; Minář, Petr (referee) ; Hermanský, Dominik (advisor)
The aim of the thesis was the study of non-contact temperature measurement and the use of this measurement in the field of production machines. The first part of thesis includes concepts and definitions that are necessary for familiarization with the issue. In the second, practical part, contact and non-contact measurements were compared in two experiments. In the first one the machine frame was measured, on which the thermal load was simulated, the emission was determined, which was compared with emissivity from the tables. In the second experiment, the temperature gradient of the ball screw was measured during the ball screw operation and was determined emissivity, which was again compared with the table values. The conclusion of the thesis summarizes advantages and disadvantages of non-contact measurements that have been verified in practice.
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Safety of technological systems
Rotnágl, Pavel ; Pavlík, Josef (referee) ; Hammer, Miloš (advisor)
This thesis is focused on technical systems and evaluating their safety. It tries to make a complex view of links between safety, demands for quality and technical diagnostics. It tries to apply all the information about mentioned features to concrete branch of machines ¨C highŠ\voltage electrical rotary machines. Practical part of this thesis consists of statistical analysis of measured parameters by two hydroelectric generators. Main task of this thesis is to transpose theoretical knowledge of safety and technical systems to the branch of highŠ\voltage electrical rotary machines. This thesis also tries to find appropriate and more efficient evaluation method for analyzing the parameters of mentioned machines. Another benefit of this thesis should be bringing few new ideas about evaluating safety and technical status of highŠ\voltage electrical rotary machines. Keywords: technical system, safety, highŠ\voltage electrical machines, technical diagnostics
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Proactive system maintenance machines in engineering practice
Morcinková, Lenka ; Řezníčková, Hana (referee) ; Hammer, Miloš (advisor)
This bachelor thesis concerns the technical diagnostics and maintenance of machine tools. The first part of it deals with this topic theoretically, the practical part focuses on the application of specific measures. Bachelor thesis includes vibrodiagnostic measurement of the lathe, suggestion of the proactive maintenance system and other activities that could help with the development of maintenance management in company SMC Industrial Automation CZ s.r.o.
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Modern approaches in the maintenance field
Pšenková, Tereza ; Řezníčková, Hana (referee) ; Hammer, Miloš (advisor)
This master thesis deals with position of the maintenance in the company structure and with modern management approaches. One of the highest levels of maintenance is the proactive maintenance, which is using the technical diagnostics to find out the causes of failures. The most inportant in case of machines are vibrodiagnostics and thermodiagnostics, which are going to be applied on the motors in company Bosch Diesel s.r.o.
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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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