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Quality monitoring and testing optimization at line AKD
Kuruc, Lukáš ; Hrušková, Veronika (referee) ; Polsterová, Helena (advisor)
This diploma thesis deals with issue of quality monitoring and final product testing at the AKD line. Output of this thesis is calculation of testing time optimization by Weibull distribution. In the beginning reader is familiar with AKD device, what quality management is and ways how to test final products in electrotechnical manufacturing. Main goal of this thesis is to describe differences between testing methods and optimize Burn-In testing method.
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Reliability of Lead-free Solders and the Selected Methods to Estimate its Lifetime
Švecová, Olga ; Kolařík, Vladimír (referee) ; Urbánek,, Jan (referee) ; Šandera, Josef (advisor)
The doctoral thesis is focused on reliability of lead-free solder SAC 305. Knowledge in the field of fatigue models used in determining the lifetime of solder joints are observed in this thesis. Also such methods of predicting reliability as numerically-analytical methods or reliability experimental tests are mentioned. Practical results of reliability measurement are presented. Experimental data served as the foundation for determining empirical coefficients for the fatigue model based on deformation induced by creep of the solder, which was implemented in the ANSYS environment. Results from different methods were compared and conclusions discussing the suitability of the presented prediction methods are formulated.
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Aerodynamic design of wind turbine
Chromec, Tomáš ; Fiedler, Jan (referee) ; Škorpík, Jiří (advisor)
This master‘s thesis focuses on wind turbines. The first part describes the basic attributes of wind energy and wind turbines and is accompanied by a many images. The next section is a statistical processing of measured meteorological data from measuring stations of the Czech Hydrometeorological Institute. These data are then used for calculations of the blades of wind turbines. The calculations are carried by two different methods. The first method is called the blade element momentum theory, the second method is the theory of blade cascade. Using these methods are obtained by two different blades. The last section compares the two blades in terms of geometric and performance.
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Wind action on high-rise buildings
Damek, Marek ; Eliáš, Jan (referee) ; Nevařil, Aleš (advisor)
This thesis is focusing on comparison two approaches wind actions on high rise buildings. Determinist approach will consider by norm ČSN EN 1991-1-4. Stochastic approach by real wind speeds and synthetic generate wind speeds. Wind as a random value, variable on time and height. Model of water tower will use for the comparison.
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Změny v pravděpodobnostní distribučni funkci koncentrací pasivní příměsi
Jurčáková, Klára ; Riveron, F.
The scope of this study is to find general description of probability distribution functions (PDF), which describes temporal variation of passive contaminant concentrations released from ground level point source within the atmospheric boundary layer. The Weibull distribution was found to be most suitable form for those PDFs. Two parameters of Weibull distribution were found to be a function of gross time series parameters such mean and standard deviation values of the concentration time series.
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