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Reentry CubeSat
Kopecký, Matěj ; Daněk, Vladimír (referee) ; Zikmund, Pavel (advisor)
This bachelor´s thesis deals with the analysis of the re-entry of the miniature CubeSat satellite from lower orbit. In the opening section, it is explained how re-entry process works, what bodies are typically used and the possibilities for protecting them from atmospheric resistance. The thesis is also focused on the mentioned group of CubeSat satellites and defines them according to general requirements. Using the knowledge learned from the opening section, a theoretical introduction to the preliminary analysis of the re-entry of the CubeSat satellite was put together, followed by a sample calculation. Here, it is explained how the CubeSat moves as it descends throughout the atmosphere and what parameters it needs to meet in order to make the re-entry.
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Design proposal of the 12U CubeSat structure
Kopecký, Matěj ; Lazar, Václav (referee) ; Junas, Milan (advisor)
CubeSat-y jsou v dnešní době velmi populární téma díky své ceně a jednoduchosti. Jejich použití se v poslední době ubírá spíše směrem ke komerční sféře trhu, kde vzniká velké množství společností poskytující široké spektrum služeb pro mise CubeSat-ů. Jednou z těchto společností je i Výzkumný a zkušební letecký ústav (VZLÚ), který nedávno zahájil vývoj série struktur CubeSat-ů o velikosti 1U – 3U. Tato závěrečná práce je zpracována ve spolupráci s VZLÚ. Práce je zaměřena na vytvoření informační platformy, zahrnující průzkum trhu a následující konstrukci včetně její pevnostní kontroly, struktury CubeSat-u o velikosti 12U jakožto pokračování v rámci dalšího vývoje série struktur o velikosti 6U – 12U.
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Design proposal and analysis of the 3D printed 1U CubeSat frame
Kilián, Ondřej ; Jetela, Václav (referee) ; Lazar, Václav (advisor)
Tato diplomová práce se zabývá tvorbou a následnou analýzou 3D tisknutého rámu pro satelit třídy CubeSat. Tento CubeSat je konstruován podle standartu „CubeSat Design Specification” z Kalifornské polytechniky revize 14. Unikátní přístup, jakožto použití 3D tisknutého plastu je bude potřeba podrobit následným reálným testů které nejsou v rámci této diplomové práce, jelikož použití 3D tisknutých plastů není zahrnuto v tomto standartu. Modelování a tvorba podpůrných materiálů pro generaci G-kódů a pro následnou MKP analýzu je provedeno v programu Autodesk Inventor Pro 2020. Tyto podpůrné materiály jsou ve formátu STEP. G-kódy pro 3D tisk jsou tvořeny v programu PrusaSlicer 2.4.1. MKP analýza je provedena v programu MSC Patran a MSC Nastran kde generace sítí, zavádění sil a umístění okrajových podmínek je použit program MSC Patran. Následná řešení je provedeno v řešiči MSC Nastran a poté interpretace výsledků je provedena díky vizualizacím zpět v programu MSC Patran. Celkový design je považován za úspěšný, jelikož splňuje veškeré požadavky na něj kladené a zároveň je adekvátně zkonstruován, aby vydržel zatížení na něj kladené během vypuštění na oběžnou dráhu kolem země.
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Design of the telescope spectrograph for distant object analysis
Drobil, Tomáš ; Pořízka, Pavel (referee) ; Novotný, Jan (advisor)
Meteor spectra obtained from orbit include many spectral lines in the ultraviolet region, which is mostly absorbed by the atmosphere and thus cannot be observed from ground stations. This bachelor thesis focuses on the design of a spectrograph, placed in a 2U CubeSat, suitable for meteor observation and its spectral analysis in the range from the ultraviolet to near-infrared region. The design includes choice of a suitable camera. Based on the required parameters, several designs have been created, and the process is summarized in the last chapter. The research study of telescopes combined with spectrometers used for meteor observations is also included.
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Vibration and impact measurement for collision analysis
Andruška, Martin ; Hrubý, Lukáš (referee) ; Musil, Tomáš (advisor)
This bachelor’s thesis deals with the issue of CubeSat collision and detection with microscopic particles of space debris and meteoroids. The aim of the thesis is to approach methods of detection, to describe various sensors for measurement of acoustic emission, shock and vibrations caused by collisions and by experimental comparison determine the suitability of their application. The thesis also contains description of possible methods of data analysis using amplitude and spectral analysis. Finally, there is a suggestion and realization of a possible way of processing acquired data from a sensor using an FPGA.
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Design and production of an emission spectrograph tube for the SLAVIA microsatellite project
Zlínská, Marie ; Dvořák, Jaromír (referee) ; Píška, Miroslav (advisor)
The manufacture and design of components for the aerospace industry has its own specific requirements. One of these are the requirements for low weight, resistance to temperature changes, high rigidity and cost-effectiveness. This paper presents the design and subsequent manufacture of a tube for the SLAVIA project hyperspectral camera, taking into account the project requirements and the demands of the space environment. First of all, a thermo-structural analysis of the satellite's orbit around the Earth was carried out to identify possible deformations of the camera tube that could cause inaccuracies in image acquisition. It turns out that the lower the temperatures of the inner walls of the satellite, the more deformation of the tube and its position in satellite occurs. The design solution was then presented, followed by the fabrication of the camera tube, during which the manufacturability of the components and the assemblability of the device were verified. It has been found and confirmed that the most challenging task was to determine the dimensions of the grooves in such a way that the high stiffness of the whole assembly was maintained.
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Design proposal and modal analysis of fixture for CubeSat vibration tests
Pospíšil, Jakub ; Bartoněk, Jaroslav (referee) ; Lazar, Václav (advisor)
Hnutí CubeSatů se v současné době těší vzrůstající oblibě, především díky možnosti zapojení širšího okruhu institucí do vesmírného výzkumu. Tento zájem zároveň vyvolává nutnost provádět mechanické zkoušky CubeSatů dříve, než je bude možné vypustit do vesmíru. Tato závěrečná práce zpracovává problematiku mechanických zkoušek u CubeSatů a provádění jejich vibračních zkoušek. Na základě této rešerše je proveden návrh přípravku o velikosti 6U včetně modální analýzy a ověření vyrobitelnosti.
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Antenna Mesurement System for Small Satellites
Dovičák, Ivo ; Pospíšil, Martin (referee) ; Urbanec, Tomáš (advisor)
Goal of this thesis was design and realization of a measurement system for measurement of reflection coefficient magnitude for connected antennas in 27-2500 MHz range. Measurement using resistive bridge is chosen as a suitable measurement method. System consists of electronic device controlled by STM32WB microcontroller unit and software for controller PC written in Python programming language using PyQt library. Communication between the device and controller PC is realized using Bluetooth interface. Circuitry for signal generation is based on Phase Locked Loop MAX2870. Device is powered from standard 18650 battery. Dimensions of the designed printed circuit board are suitable for use in CubeSat satellites. System can be used as a frequency synthesizer as well.
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Proposal of the thermo-vacuum chamber for CubeSat testing
Jalůvka, Jiří ; Mašek, Jakub (referee) ; Lazar, Václav (advisor)
The thesis focuses on the development of thermo-vacuum chambers for CubeSat measurements. It presents a survey of thermo-vacuum chambers in the Czech Republic. Furthermore, it defines the requirements for CubeSat thermo-vacuum testing. Based on these requirements, a comparison is made between the existing chamber at the Aerospace Institute of VUT and several proposed solutions for individual challenges. Specifically, three innovative approaches to chamber entry, thermal systems, and satellite fixation within the chamber are suggested. The thesis not only describes the desired configuration of a thermovacuum chamber with all its systems but also provides concrete proposals for optimizing the existing chamber at the Aerospace Institute to enable successful CubeSat testing.
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