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Magnetically levitated cart
Jančuš, Rastislav ; Pohl, Lukáš (referee) ; Blaha, Petr (advisor)
Diploma thesis is summarizing common theoretical knowledge about permanent magnets and electromagnetism. Represent DC electromagnet as basic part for levitated high-speed train. Work is analyzing basics under cart and principles used for magnetic levitation in high-speed transportation. Second practice part including projecting construction levitated cart and analyzing acquired mathematical model of electromagnet. Work is analyzing process for projecting control for side electromagnets and realization real model, including tuning computer communication with states of sensors and comparison real model with model simulated in program Simulink.
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PMSM robust control
Rajnošek, Michal ; Veselý, Ivo (referee) ; Blaha, Petr (advisor)
This work is focused on robust control of permanent magnet synchronous motors. In the early chapters is given theory to design robust controllers using H infinity method and description and features of permanent magnet synchronous motors. Last chapters contains design of current and speed controllers for specific engines. Functionality of these controllers is verified by simulations.
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Robust control of electromechanical systems
Pohl, Lukáš ; Václavek, Pavel (referee) ; Blaha, Petr (advisor)
This thesis deals with the modern control approaches applicable to speed control of an induction motor. Historical perspective to the control theory and its evolution to the modern control will be presented in a short introduction. Basics of uncertainty modeling are presented along with linear fractional transformation (LFT) representation of an uncertain system. Two different approaches for robust controller synthesis are introduced - H-infinity loopshaping and mixed sensitivity H-infinity synthesis. Theoretical background is presented for both of these methods. Finally the robust controller for induction motor satisfying the control goals is designed using both methods. Design objectives are presented as transfer function weights shaping the sensitivity or complementary sensitivity function to desired shape. Several step responses were simulated to compare H-infinity loopshaping and mixed sensitivity H-infinity controllers with the conventional vector control approach.
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Remediation of cemeteries since the mid-20th century and their transformation into memorial parks
BLÁHA, Petr
The bachelor thesis focuses on the issue of closing and closing of cemeteries in the city of Písek with special attention to the history and process of transformation of the church with the cemetery at Holy Trinity into the Memorial Park-Memorial of the city of Písek. The first chapter provides an overview of the legal norms and the system of state administration and self-government in Czechoslovakia in the period 1918-1990, with special attention to the area of funeral services and the administration of individual types of burial grounds. For the sake of better orientation, this chapter is divided into several subchapters, each dealing with a defined period of time with regard to the legal and administrative changes in the various types of burial grounds. The second chapter provides information on Holy Trinity Church and Cemetery from its origins to the 21st century. This chapter is interspersed at points with the history of the Sandy Municipal Forest Cemetery, on the grounds that the existence and brief coexistence of these two cemeteries between 1933 and 1949 influenced burial processes in the town. The third chapter is a description of the history of St. Wenceslaus Church and Cemetery. This chapter outlines the process of closure, disturbance, and subsequent disposition of the burial grounds. The last chapter of this thesis briefly describes the history of the Jewish community in Písek and then focuses on the local Jewish cemetery and the extent of its devastation, which ultimately led to the irreplaceable loss of Jewish monuments in the form of tombstones, but one of the basic rules of Jewish burial was also violated when in 1988 the remains of Richard Weiner were exhumed and subsequently moved to the non-denominational Písek Forest Cemetery.
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Hybrid Method for Modelling and State Estimation of Dynamic Systems
Brablc, Martin ; Blaha, Petr (referee) ; Bugeja, Marvin (referee) ; Grepl, Robert (advisor)
Tato Disertační práce se zabývá vývojem nové hybridní metody pro současné odha- dování stavů a parametrů nelineárních dynamických systémů, založené na myšlence lokálních lineárních modelů, která využívá odhad nejistoty parametrů modelu pro automatické nastavení některých parametrů Kalmanova filtru (KF), čímž se výrazně zjednodušuje její nasazení a nastavení v praktických aplikacích. V první části se disertační práce věnuje shrnutí aktuálního stavu poznání v oblasti dynamických systémů, simultánní estimace, KF a modelování nelineárních dynamických systémů. Následně se ve dvou samostatných kapitolách věnuje modifikaci KF pro situace, kde dominantním vlivem způsobujícím procesní šum jsou nepřesné parametry modelu, a dále modifikaci metody Receptive field weighted regression (RFWR) tak, aby mohla být použita pro duální estimaci. Nakonec práce popisuje vyvinutou hybridní metodu složenou z modifikovaných algoritmů RFWR a KF nazvanou Receptive field dual estimation - (RFDE) a demonstruje její funkčnost na simulačních i reálných datech.
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Parametrization of PID controller on Mitsubishi PLC
Koláčný, Michal ; Bartík, Ondřej (referee) ; Blaha, Petr (advisor)
The aim of this thesis is to create a demo application for a brief introduction with the components of the PID regulator. The PID regulator is realized by a function block, which is implemented in a Mitsubishi PLC series iQ-F. The controlled variable is the height of the ping pong ball. The ball is kept at the desired height by changing the air flow rate. The change of the air flow is achieved by changing the motor speed. A propeller is mounted on the motor shaft which blows air into the tube. A SHARP GP2Y0A41SK0F optical distance sensor is built into the tube to sense the actual height of the ball. A model of this system is created and simulated in MATLAB program.The current information about the system is displayed on the Mitsubishi GT-2104RTBD operator panel, where it is also possible to change the sizes of individual parameters of the regulator.
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Neural networks on AURIX platform
Smrčka, Michal ; Buchta, Luděk (referee) ; Blaha, Petr (advisor)
Part of this thesis discusses FNNs and how to develop them using MATLAB Deep Learning Toolbox and Keras API in Python. Subsequently, the thesis deals with the conversion of these networks into C/C++ using the Keras2c, AIfES, TFLM and NNoM libraries. This theoretical background was essential for the follow-up section, which focuses on the implementation and testing of the trained FNN on the AURIX TC397 3.3V Application Kit platform. This FNN is used to diagnose the PMS motor in order to detect inter turn faults. The configuration of the GPT12 and GETH peripherals of the AURIX TC397 microcontroller, which were used in the FNN testing application, is described in detail in this thesis. Using the Keras2c library, the possibility of running inference on 2 cores of the AURIX microcontroller was verified and quantization of the trained FNN was performed within the NNoM library. Finally, a comparison of the Keras2c, AIfES, TFLM and NNoM libraries was performed in terms of ease of implementation, classification accuracy and classification speed on the AURIX platform.
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Fault relevance diagnostics of the PMSM under the inter-turn short circuit fault
Zezula, Lukáš ; Václavek, Pavel (referee) ; Blaha, Petr (advisor)
Tato práce popisuje matematické modelování mezizávitových zkratů fázového vinutí synchronního motoru s permanentními magnety, diskretizaci odvozeného modelu a diagnostiku závažnosti zkratu založenou na referenčním modelu. Popis zkratovaného stroje je vytvořen v proměnných statoru s uvažováním sérioparalelního zapojení vinutí a následně transformován do referenčního rámce rotoru pomocí rozšířené Clarkové a Parkovy transformační matice. Diskrétní ekvivalent navrženého modelu je vytvořen pomocí definované diskretizace lineárních časově variantních systémů, přičemž je uvažováno, že elektrická úhlová rychlost je časově variantní parametr s definovaným integrálem. Diskrétní model je transformován do referenčního rámce statoru, aby se maximalizovala perzistence vstupních signálů. Diagnostika závažnosti zkratu je poté realizována pomocí rekurzivního parametrického odhadu diskrétního modelu. Jedna z kapitol je věnována i popisu řídicího systému, neboť zkraty mohou ovlivnit stavové proměnné různým způsobem v závislosti na architektuře a volbě parametrů řídicího systému. Za každou kapitolou následuje experimentální ověření prezentovaných myšlenek.
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