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Calibration and linearization of an RTD sensor
Hucl, Václav ; Šedivá, Soňa (referee) ; Beneš, Petr (advisor)
First part of this work is focused on the description exist method of analogue and digital calibration and linearization static parameters resistance sensors. Second part deal with concrete problem linearization thermistor NTC by multivibrator compound of two transistors same polarity and multivibrator, where active element is operational amplifier. Last part of bachelor work is devoted digital linearization based on curve fitting and linearization based on piecewise-linear interpolation, their using with thermistor NTC and comparison their attributes.
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Adaptation of digital predistorter to linearize amplifiers using comparator
Jagla, Lukáš ; Ayöz, Suat (referee) ; Götthans, Tomáš (advisor)
Diplomová práce pojednává o návrhu nového hardwaru využívající komparátor ve zpětné vazbě systému pro digitální předzkreslování signálu. Vybrané vlastnosti navrhované architektury jsou ověřeny pomocí simulací a následně jsou zvoleny komponenty vhodné pro vysokofrekvenční použití za účelem implementace. Na bázi předložené architektury je navržen akviziční modul včetně obvodové realizace a vytvoření plošného spoje. Zhotovený plošný spoj je osazen a připraven pro další testování. Dále je navržen příslušný firmware pro příjem a vysílání signálu a získávání naměřených dat. Obdržené výsledky jsou určeny pro zhodnocení vlastností hardwaru a budoucího využití architektury v systémech digitálních předzkreslovačů.
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Heat exchanger model
Dufek, Martin ; Hynčica, Ondřej (referee) ; Štohl, Radek (advisor)
This bachelor thesis deals with programmable logix controller ControlLogix, panel PanelView Plus, model of the heat exchanger and its components. The main goal is to suggest a model exercise for exchanger and processing of standard measurements. Model exercise is solving regulation and handling fault conditions. Visualization solves a draft and a realization within a work with the model which makes possible to monitor a state of the model in distance conditions and its controlling.
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Mathematical models of military conflicts
Skopal, Martin ; Potůček, Radovan (referee) ; Čermák, Jan (advisor)
This thesis discusses the mathematical models used in the theory of warfare. The aim is to build and describe the Richardson model of conict and selected Lanchester models of combat. The models are subsequently analysed with a focus on stability. A part of the thesis is also formed by application of real data onto the models and by the subsequent evaluation of their results.
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Stability and chaotic behaviour of the Lorenz system
Oborná, Eliška ; Nechvátal, Luděk (referee) ; Čermák, Jan (advisor)
This bachelor's thesis analyzes the behavior of the Lorenz's model of convective flow in the atmosphere depending on the Rayleigh number. It offers several methods when analyzing stability of nonlinear systems of the first order autonomous differential equations. Part of the work also consists of introduction to deterministic chaos which appears in dynamic systems with a parameter. The work is supported by graphic interpretation of a stable and chaotic behavior by using the software Maple.
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Laboratory tasks for Amira DTS200
Sikora, Jan ; Pohl, Lukáš (referee) ; Blaha, Petr (advisor)
In this work is introducing the laboratory system Amira DTS 200. It concerns of a system of 3 communicating vessels, pumps and pressure liquid level sensors. At this system are make several task on identification and regulation liquid level. System is simulated and controlled in Simulink diagram. Control is real-time via the Matlab Real- Time toolbox. System is identified by the help of analyses physical equation and their transferring to Simulink blocks. Some unknown parameters are experimentally measured. In regulation tasks is solved linearization, various basic methods of controller design and their using. Tasks include few check questions for students.
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Light Airplane Flight Parameters Estimation
Dittrich, Petr ; Pačes, Pavel (referee) ; Fiľakovský, Karol (referee) ; Chudý, Peter (advisor)
Tato práce je zaměřena na odhad letových parametrů malého letounu, konkrétně letounu Evektor SportStar RTC. Pro odhad letových parametrů jsou použity metody "Equation Error Method", "Output Error Method" a metody rekurzivních nejmenších čtverců. Práce je zaměřena na zkoumání charakteristik aerodynamických parametrů podélného pohybu a ověření, zda takto odhadnuté letové parametry odpovídají naměřeným datům a tudíž vytvářejí předpoklad pro realizaci dostatečně přesného modelu letadla. Odhadnuté letové parametry jsou dále porovnávány s a-priorními hodnotami získanými s využitím programů Tornado, AVL a softwarovéverze sbírky Datcom. Rozdíly mezi a-priorními hodnotami a odhadnutými letovými paramatery jsou porovnány s korekcemi publikovanými pro subsonické letové podmínky modelu letounu F-18 Hornet.
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Improvements of JPEG Format
Liška, Radek ; Polok, Lukáš (referee) ; Bařina, David (advisor)
This thesis deals with lossy still image compression algorithms used in JPEG standard. All compression steps according to this standard are described in detail. My objective is to introduce and implement improvements that would result in increased compression ratio while adhering to the structure of the standard. At the end of the thesis, the implementation is compared to standard implementation and additional possible improvements are proposed.
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Battery-powered welding inverter
Starec, Stanislav ; Folprecht, Martin (referee) ; Vorel, Pavel (advisor)
This master thesis is focused on proposition and following implementation of DC arc welder. This paper is based on semester’s paper, where the first version was realized. The welder is powered by a battery pack with LiFePO4 type cells. Battery cells are protected by BMS circuits. The driving electronics controls the duty cycle step-down (buck) converter in a closed current or power regulation loop. The power regulator has been designed and validated by simulations. Switching power transistors, low side and high side, are implemented by optically isolated gate drivers. Charging the battery is solved by a switching flyback converter. For the charger and the welder is sheet metal construction made of aluminum sheet.
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