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3D printing methods for foundry applications
Rendek, Andrej ; Pernica, Vítězslav (referee) ; Krutiš, Vladimír (advisor)
The bachelor thesis is focused on the application of 3D printing methods for foundries, specifically for investment casting technology. The paper describes different printing methods and principles which they are based on with a more detailed description of materials containing their properties and in some cases recommended modifications of the casting process. The last part is devoted to price comparison of three selected methods of model printing for investment casting and dilatometry of six materials with evaluation of their coefficients of thermal expansion and glass transition temperatures.
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Design and control of the omnidirectional chassis
Rendek, Andrej ; Kočiš, Petr (referee) ; Szabari, Mikuláš (advisor)
The master's thesis deals with the design of a locomotion system of an omnidirectional robot designed for application in sandy environment. The introductory part of the thesis is an overview in the field of current solutions of omnidirectional chassis of mobile robots. The thesis continues with a choice of possible variants. The variant evaluated as the most suitable is then elaborated in detail. This includes an analysis of the resistances acting on the chassis under conditions and movements representing omnidirectional movement in the sand. Analysis is followed by a selection of drives and a design solution supplemented by stress analysis. The final part is focused on the chassis control algorithm.
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Simulations of dynamics of ultra-cold quantum plasma
Rendek, Andrej ; Hejduk, Michal (advisor) ; Roučka, Štěpán (referee)
Title: Simulations of dynamics of ultra-cold quantum plasma Author: Andrej Rendek Department: Department of Surface and Plasma Science Supervisor: Mgr. Michal Hejduk, Ph.D., Department of Surface and Plasma Science Abstract: We investigate the confinement of charged particles in an oscillating electromagnetic field, intending to trap electrons and calcium ions simultaneously. The theoretical part of this thesis focuses on the derivation of exact and effective potentials in a single frequency quadrupole trap. We show a general treatment of stability in such a field. Passing attained knowledge onto two-frequency trapping, which is much more suitable for confining two species with widely different charge-to-mass ratios. We follow up by studying the stability of electrons, employing computer simulations in the ideal two- frequency Paul trap. Our ambition is to identify a stable configuration minimizing electrons' temperature. We create multiple ion Coulomb crystals and examine the effect of their presence on electrons' stability. These efforts support the development of an experiment with the ambition to create and study quantum plasma. The composition of this experiment is outlined here as well. Keywords: Ion trapping, Coulomb crystal, Two frequency Paul trap
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Design and control of the omnidirectional chassis
Rendek, Andrej ; Kočiš, Petr (referee) ; Szabari, Mikuláš (advisor)
The master's thesis deals with the design of a locomotion system of an omnidirectional robot designed for application in sandy environment. The introductory part of the thesis is an overview in the field of current solutions of omnidirectional chassis of mobile robots. The thesis continues with a choice of possible variants. The variant evaluated as the most suitable is then elaborated in detail. This includes an analysis of the resistances acting on the chassis under conditions and movements representing omnidirectional movement in the sand. Analysis is followed by a selection of drives and a design solution supplemented by stress analysis. The final part is focused on the chassis control algorithm.
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3D printing methods for foundry applications
Rendek, Andrej ; Pernica, Vítězslav (referee) ; Krutiš, Vladimír (advisor)
The bachelor thesis is focused on the application of 3D printing methods for foundries, specifically for investment casting technology. The paper describes different printing methods and principles which they are based on with a more detailed description of materials containing their properties and in some cases recommended modifications of the casting process. The last part is devoted to price comparison of three selected methods of model printing for investment casting and dilatometry of six materials with evaluation of their coefficients of thermal expansion and glass transition temperatures.
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