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Educational PocketQube Satellite
Veverka, Jiří ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
Tato diplomová práce je zaměřena na návrh výukového satelitu typu PocketQube 2P (50x50x100mm) a pozemní stanice, které budou využívány ve výuce STEM laboratoří. Navržený systém byl navržen s důrazem na modularitu, snadnou výměnu za použití komerčních volně dostupných součástek a snadné pochopení subsystémů, které lze v družici tohoto typu nalézt, tedy palubní počítač, komunikační modul, napájecí systém a payload. Mimo vnitřních modulů byla vyvinuta i vnější konstrukce, která je celá vyrobena z desek plošných spojů a dohromady tvoří základ družice. Vyvinutá družice a pozemní stanice využívají ke komunikaci rádiový modul RFM98W s modulací LoRa.
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Applicability of Low-Cost Picosatellites
Roman, Maroš ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
Tato práce zkoumá využitelnost platforem picosatelitů nebo femtosatelitů ve vzdělávání. Popisuje se zde návrh femtosatelitové platformy jménem Femtostrat-1, která může sloužit jako vzdělávací nástroj pro univerzitní laboratorní cvičení. Platforma je navržena tak, aby obsahovala všechny systémy, které se očekávají na skutečné satelitní platformě. Jsou probírány možnosti využití této platformy, včetně různých metod vypuštění nebo různých komunikačních standardů. Navíc tato práce práce popisuje návrh a realizaci letového modelu Femtostrat-1. Na závěr je popsán stratosférický testovací let Femtostrat-1 a výsledky tohoto letu.
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Educational Nanosatellite in PocketQube Format
Lokaj, Jakub ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
Hlavním tématem této diplomové práce byla teoretická analýza současných trendů ve vývoji nanosatelitů, konkrétně se zaměřením na formát PocketQube a jeho aktuální implementaci. V jednotlivých teoretických kapitolách se práce zabývá možnostmi a výhodami využití PocketQube jako výukového modelu pro vzdělávací a vývojové oblasti. Zabývá se také možnostmi 3D tisku nosné konstrukce družice a rozebírám jednotlivé komponenty, jako je palubní počítač, komunikační systém založený na technologii LoRa, napájecí systém a přehled subsystémů. V praktické části byl vyvinut rám družice, jednotlivé části struktury elektroniky PocketQube a implementace základní funkce komunikace a provozu pro vzdělávací model PocketQube.
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Digital Signal Processor for Handheld RFID Reader
Benetka, Miroslav ; Zamazal, Michal (referee) ; Šebesta, Jiří (advisor)
This diploma thesis deals with design and realization of a module for a digital signal procesor, for handheld RFID reader working in UHF band. It utilises a special chip EM4298 for RFID signals processing. Module is controlled by the microcontroller ATmega32L, which communicates with the PC through USB bus. Settings in EM4298 is made by a service program which processes received identifying data obtained from tags. Source codes for microcontroller are created in AVR Studio 4.13 program. Source codes for microcontroller are created in C++ Builder 6.0 program. Further thing is Desing and realization of analog interface and a UHF transceiver for wireless communication with tags. A Webench program was used for the analog interface design, which is freely available on the internet. For verification of parameters of the analog interface it was used PSpice 10.0 program. The UHF transceiver is build-up with a MAX2903 chip (transmitter) and AD8347 (receiver) and transmitting and receiving antennae.
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Digitally Controlled Switching Power Supply
Krška, Vlastimil ; Zamazal,, Michal (referee) ; Šebesta, Jiří (advisor)
This master’s thesis is an introduction to switching mode power supplies, especially focused on digital control. It summarizes the basic topologies of switching mode power supplies, and discusses the fundamental issues of digital power supply control. It also summarizes basic informations about Piccolo microcontrolers, about experimental kit and about main parts of sample source code. Also is described here own implementation of the control law and the theory and implementation of maximum power point tracking. The conclusion of this thesis deals with implemantation a testing of the designed digitally controled switching power supply.
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HW interface of database server
Janů, Petr ; Zamazal, Michal (referee) ; Fuchs, Michal (advisor)
The aim of master's thesis is implementation of hardware interface database server. Interface will be collecting data at installation place. Interface will be connected to a remote MySQL server using an Ethernet network and saving data received by serial line in a database.
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Design and implementation of educational CubeSat
Košút, Martin ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
This thesis describes the design of a CubeSat with a 1U (10x10x10 cm) size, which will be used in laboratory tasks. It includes mechanical construction printed on a 3D printer with six photovoltaic cells, mounted on the top. Cells will produce electricity to power all systems and to charge the onboard NiMH batteries to make the CubeSat independent of other sources of energy. The proposed design of an electrical power supply system and an onboard computer combined with a communication system is based on off the shelf components. The two-way wireless communication link between computer and a CubeSat is realized thanks to the ground station, which is also part of a design. Students will make other systems, which will communicate with the built in onboard computer via internal RS 485 communication bus. Internal EEPROM memory is used to save measured values. Modularity, possible future expandability, and easy repair in case of any failure were the key optimization parameters of the design.
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Antenna for microwave beacon on X-band
Zamazal, Bořivoj ; Pokorný, Michal (referee) ; Kasal, Miroslav (advisor)
This bachelor’s thesis describes an antenna design for microwave beacon in 10 GHz band. In the first section of the work, the possible solutions are presented and a slot antenna, constructed from commercially available waveguide, is chosen. In the second section, the principle of this antenna is described and the dimensions for the chosen frequency and the type of waveguide are calculated. In the third section, the antenna model is built and simulated in the Ansof HFSS environment in accordance with theoretically calculated dimensions and, based on these simulations, two possible versions of antenna are created.
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Reconstruction of middle part of the fuselage Z 143 aircraft using semi- monocoque frame
Zamazal, Jakub ; Mališ, Michal (referee) ; Píštěk, Antonín (advisor)
The thesis is focused on reconstruction of middle part of fuselage Z 143 aircraft from truss frame to semi-monocoque frame. In the thesis there is a conceptual design of semi-monocoque middle part of fuselage. The spars of centre wing section are strength controlled. In thesis there is weight analysis according to use the semi-monocoque middle part of fuselage. In second half of the thesis there is a study of retractable landing gear. The thesis shows weight savings according to use a semi-monocoque frame. The thesis also shows that semi-monocoque frame allows other option to upgrade Z 143 aircraft. This thesis can serve as a feasibility study of the reconstruction of the middle part of the fuselage Z 143 aircraft.
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SDR-based UHF RFID communication analyzer
Vychodil, Josef ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
Main topic of this thesis is development of software for capture and analysis of RFID communication in UHF band (standard EPC Class-1 Generation-2). One part of the work is focused on the basics of the RFID systems, software defined radio concept and graphical programming language LabVIEW. Main part of this thesis is discussing the developed software itself, its methods and principles. Next part is dedicated to present the graphical user interface of created application and its functionality. Last part of this thesis contains examples of captured and analysed processes in UHF RFID communication.
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