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3D printing methods for foundry applications
Rendek, Andrej ; Pernica, Vítězslav (oponent) ; Krutiš, Vladimír (vedoucí práce)
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 (oponent) ; Szabari, Mikuláš (vedoucí práce)
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 (vedoucí práce) ; Roučka, Štěpán (oponent)
Názov práce: Simulace dynamiky ultra-chladného kvantového plazmatu Autor: Andrej Rendek Katedra: Katedra fyziky povrchů a plazmatu Vedúci práce: Mgr. Michal Hejduk, Ph.D., Katedra fyziky povrchů a plazmatu Abstrakt: V tejto práci skúmame zachycovanie elektricky nabitých častíc pomocou oscilujúcich elektromagnetických polí, s cieľom súčasne zachytiť ióny vápniku a elektróny. V teoretickej časti sa zameriavame na odvodenie presného a efektívneho potencialu v jednofrekvenčnej kvadrupólovej pasti. Ukazujeme obecný prístup k stabilite častice v takomto poli. Získané znalosti ďalej použijeme pre prípad dvojfrekvenčnej pasti, ktorá je vhodnejšia pre zachycovanie dvoch rôznych častíc s výrazne odlišným pomerom náboja ku hmotnosti. Pokračujeme štúdiom stability elektrónu za použitia počítačových simulácií v dvojfrekvenčnej kvadrupólovej pasti. Našou ambíciou je identifikovať stabilnú configuráciu pasti, ktorá súčasne minimalizuje teplotu elektrónov. Vytvoríme niekoľko Coulombových krýštálov a sledujeme ich vplyv na stabilitu elektrónu. Touto prácou napomáhame k zhotoveniu experientu, v ktorom sa snažíme vytvoriť a študovať kvantovú plazmu. Zostava tohto experimentu je taktiež načrtnutá našej práci. Kľúčové slová: Zachycovanie iónov, Coulombov kryštál, Dvojfrekvenčná kvadrupólová pasť
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Design and control of the omnidirectional chassis
Rendek, Andrej ; Kočiš, Petr (oponent) ; Szabari, Mikuláš (vedoucí práce)
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 (oponent) ; Krutiš, Vladimír (vedoucí práce)
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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