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Reliability of Technical Systems
Jirgl, Miroslav ; Šedivá, Soňa (referee) ; Havlíková, Marie (advisor)
This thesis deals with a reliability of technical systems. It is divided into four main parts. The first part deals with the mathematical description of reliability. Probability and statistics are used for this description. This part includes the definition and properties of random events, the description of discrete and continuous random variable and its distribution. The second part contains the definition and expression of reliability, types of faults in the digital circuits and the reliability of electronic components. This part introduces into problems of reliability. The third part includes making the reliability diagrams and reliability analysis. Each method is briefly described here. Further advantages and disadvantages of using each method are given here. The two most widely used reliability analysis - Failure Mode and Effect Analysis - FMEA (resp. FMECA) and Fault Tree Analysis – FTA are described in a greater detail. The last part focuses on an example of calculation of reliability. An analyzed object is Universal Charger NiMH and NiCd batteries. Reliability is analysed by block diagram, FTA and FMEA.
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Methods of Reliability Analyses of Operation and Testing Data of Airplanes
Novák, Josef ; Nevrlý, Josef (referee) ; Nejedlý, Ludvík (referee) ; Třetina, Karel (advisor)
The doctoral thesis deals with reliability (dependability) analyses of operation and testing data of the Airplanes. Requirements of airworthiness regulations on aircraft hydraulic systems (with a focus on US FAR-23 and European CS-23 regulations) are taken into account. Mentioned regulations include requirements for the structural design, design of systems, etc. They cover wide range of airplanes from small sport airplanes to 19-seats transport aircraft. Also options for predictive reliability analyses (resources) and reliability tests are discussed in the doctoral thesis. Practical application is done on small transport airplane (currently in the development). The failure report is designed. Expected major contribution of the work is selection and practical application of the most suitable procedures for safety assessment on the field of aircraft hydraulic systems, with a focus on the small transport aircraft. Also the comparison to different data source is shown.
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Risk Analysis Software Support
Mokrá, Radka ; Očenášek, Pavel (referee) ; Kreslíková, Jitka (advisor)
This master's thesis deals with design of cross-platform application for risk analysis support. It describes risk management in information technology and methods which can be~used for risk management with emphasis on those that can be visualized. Possibilities for cross-platform development are described subsequently. Next, application for risk analysis support is designed and implemented. In the end of this thesis is shown how to use implemented application for risk analysis.
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Design and optimization of hydrostatic pocket space
Minář, Petr ; Pavlík, Jan (referee) ; Blecha, Petr (advisor)
This diploma thesis deals with an optimization of hydrostatic slide of the large-portal gantry machine FRU (TOS Kuřim). First part of the thesis concerns with an analysis of the current practice in hydrostatic guides in the field of heavy gantry machines, an usage of alternative materials for a construction of carrying parts of machines, and possibilities of current simulation methods. Aim of the second part of this thesis is a brief clarification of the principle of mathematical optimization, and creation of general methodology of construction optimization by means of system analysis. Optimization calculations were processed by ANSYS Workbench 11.0. There is achieved adjusted and optimized design of the hydrostatic slide as the result of the thesis. Moreover, the comparison of key deformations was added. Created methodology is applicable in both an area of construction of gantry machines, and a wide spectrum of construction fields.
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Diagnostic of System Reliability
Bábek, Tomáš ; Pohl, Jan (referee) ; Havlíková, Marie (advisor)
This thesis is oriented to the reliability theory and diagnostics. It involves brief explanation of terms that exists in a branches of technical devices reliability. The next part contains determining the reliability indexes, calculations of probabilities and statistics for electronic devices. I do mention the different methods of reliability diagnostics. The three most used of them are described. First of them is the reliability block model. By this I describe the serial reliability model, the parallel reliability model and the combination of them. Using this method is the simple way to show how each component affects reliability of the whole system. The second method is FMEA (Failure Mode and Effects Analysis) which is used mostly in the begining of the system designing. The third method is FTA (Fault tree analysis) which is one of the classic deductive methods. The FTA method is a graphical reliability model of a given system. By the end of this thesis, process of calculating the failure probability and the other reliability indexes of a given komponent (preamplifier with operational amplifier) is shown.
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Safety Microcontroller Applications
Nacev, Nikola ; Beran, Jan (referee) ; Klusáček, Stanislav (advisor)
The deals of thesis were described methods for designing safety applications, made analysis of possible microcontroller faults of long-run system, described software and hardware methods for fault detection in microcontroller and applied some March test to microcontroller. To application were chosen MATS+, PMOVI and March SS tests. These tests were modified to word-oriented memory. Further it was made analysis of modified tests to determination fault coverage, testing times and program memory requirement. To determination of fault coverage was created virtual memory with fault function models. March tests were compared with each other and with another pattern test (checkboard test).
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Risk Analysis of the Quality System Management
Dorňák, Ondřej ; Hykš, Ondřej (advisor) ; Plášková, Alena (referee)
The Paper is focused on risk analysis of composite bumper Arway S production process. The bumper is produced by Composite Components company for Iveco bus producer. According to discussions of expert team, several types of quality discrepancies were discovered. By using FTA analysis we discovered causes of those discrepancies. FMEA method and Pareto Analysis helped to set most dangerous discrepancies which cumulative seriousness reached 54 %. In discussion, the expert team set corrective action. In parallel with FMEA and Pareto Analysis 8D method was used. It's results were in line with other methods and complete the whole image of the issue. Arway S is a key product and so some of those proposed corrective actions were realized immediately. As a result, the appearance of rejections with specific defect almost vanished.
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Relationship between Free Trade Agreements and Foreign Direct Investment
Kim, Hyunjin ; Štěrbová, Ludmila (advisor) ; Zamykalová, Miroslava (referee)
This paper analyzed the FDI trends between Korea and its FTA partners which were Chile, Singapore and EFTA. The other group was central European countries and their FTA partner countries that are Chile, Mexico and South Africa. The empirical studies of FDI developments after FTA have found that the results were different from country to country even though they have the FTA status with the same countries. Korea has been increased FDI investment in its FTA partner countries but not with Chile and EFTA. Similarly, Germany has increased its FDI in their FTA partner countries after FTA. But most central European countries which are Czech Republic, Slovakia, Poland and Hungary were not much changed their FDI investment after FTA. But their investment also increased when we measure FDI in the absolute numbers between before and after FTA. Regarding the prospects of FDI flows between Korea and central European countries after ROKEU FTA, We took into accounts such as FDI trends with its FTA partners, FDI regime and current FDI position etc including ROKEU FTA itself. Basically, we could predict that FDI would increase in central European countries from Korea when we consider the previous trends between them and the results of empirical analyses of the FTA partner countries. So it is hard to say that FDI will be increased in Korea from these countries after FTA. But Germany would be very active outward economy and it would invest more in South Korea than before FTA.
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Trade Relations between Mexico and the EU
Sánchez Jiménez, María del Socorro ; Štěrbová, Ludmila (advisor) ; Zamykalová, Miroslava (referee)
Mexico and Europe have strong historical and cultural ties. Nowadays, even though the main commercial partner for Mexico is the United States there is a high interest in strengthen the relationship with the EU, to diversify trading partners and to reduce the dependency on the USA. In the framework of the diversification strategy the "Global Agreement", which main part is the European Union-Mexico Free Trade Agreement (EUMFTA), was signed. Even though the most industrialized countries of the EU such as Germany, the Netherlands, the United Kingdom, Spain and Italy are the priority for Mexico, it would also like to strengthen its relations with other EU member countries such as the Czech Republic. Mexico and the Czech Republic have reinforced their trade relation by signing bilateral agreements aimed at encouraging bilateral trade cooperation and also at protecting their investments.
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