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Design and implementation of display sniffer on embedded targets
Lipták, Samuel ; Šnajder, Jan (referee) ; Krejsa, Jiří (advisor)
Táto diplomová práca sa zaoberá overením funkcionality grafického rozhrania v integrovaných systémoch. Súčasné prístupy využívajúce kamerové systémy pre optickú kontrolu sú charakterizované nedostatočnou spoľahlivosťou, vysokými nákladmi, náročnou údržbou a náročnosťou na priestorové umiestnenie. Cieľom tejto práce je analyzovať a navrhnúť nový prístup k získavaniu grafických dát, ktorý bude založený na spoľahlivej technológii. Konkrétne riešenie využíva technológiu FPGA (Field-Programmable Gate Array) a celý systém je implementovaný na vývojovej platforme PYNQ. Táto platforma zároveň obsahuje server s API, čo umožňuje jednoduchší prístup k získaným dátam. Výsledkom tejto práce je nová metóda overenia funkcionality grafického rozhrania vstavaných systémov, ktorá bude spĺňať požadované kritériá spoľahlivosti a účinnosti. Takýto prístup by mohol nájsť uplatnenie v priemysle a prispieť k zlepšeniu kvality a efektívnosti kontroly kvality integrovaných systémov.
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Using hybrid maps in mobile robot localization and mapping
Fajgel, Oscar ; Králík, Jan (referee) ; Krejsa, Jiří (advisor)
This bachelor's thesis deals with analysis of current approaches to mapping used in mobile robotics and explores a hybrid mapping approach that could be used in mobile robot navigation and localization in multi-level indoor environments of buildings. Multiple methods are examined and a suitable approach is tested using ROS framework simulations. A real life test on a real robot is also concluded to test the usability of this approach.
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Design and realization of device for cyclic load of test sample in vacuum chamber
Štarha, Matěj ; Šnajder, Jan (referee) ; Krejsa, Jiří (advisor)
The master's thesis focuses on development of device for cyclic loading of standardized specimen inside the vacuum chamber of an electron microscope. Options for source of force suitable for vacuum are discussed and methodology of indirect load measurement is described. Furthermore, hardware for measurement and control is proposed. The software is implemented in two parts: microcontroller firmware and a user application for PC. The device was calibrated using a loading machine and a successful test was performed in the electron microscope.
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Visual testing using OpenQA framework
Vacek, Tomáš ; Králík, Jan (referee) ; Krejsa, Jiří (advisor)
This Bachelor’s thesis aims to validate the viability of using openQA framework to test PC applications, web applications and applications for embedded systems. The first part deals with the theory concerning application testing. The preparations of said framework is then described in the second part. The last part presents test examples for different scenarios.
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Integration of a touchscreen testing device into automated tests
Mazilkin, Dmitrii ; Krejsa, Jiří (referee) ; Šnajder, Jan (advisor)
The focus of this bachelor's thesis is the design and implementation of a modular firmware and communication interface for the integration of a touch screen tester into automated tests. The text describes the process of creating modular firmware for a microcontroller from STMicroelectronics and its division into separate modules and drivers for interaction and control of stepper motors, sensors, potentiometers and for communication with a computer. The following is a description of the communication interface, implemented using the UART bus, the HDLC link layer protocol and the Protobuf data serialization protocol. Then the Python API is described, which allows controlling the tester from a computer. The last part is devoted to the evaluation of the implemented firmware and communication interface on more complex movements.
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Localization system for mobile robot B2
Korytár, Lukáš ; Věchet, Stanislav (referee) ; Krejsa, Jiří (advisor)
The master’s thesis implements localization and navigation routines for mobile robot B2 in order to operate autonomously in an environment described by a road map only. The ROS framework was used for developing new software. The research part describes possible approaches to localization problem and summarizes ROS packages with localization and navigation software. The following part includes communication with the robot’s sensor modules and data processing from LIDAR, IMU and camera. The localization package robot_localization based on Kalman filter is implemented and setting of the navigation stack navigation is proposed, aiming to robot’s autonomous outdoor navigation. Implemented functions were tested in park environment and they are evaluated in this master's thesis too.
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Vibration of faulty bearing depending on the load
Slaninová, Barbora ; Marcián, Petr (referee) ; Krejsa, Jiří (advisor)
The subject of the presented bachelor thesis is an analysis of a bearing vibration during its failure on inner race with varying load. The work aims to create a model simulating the time course of vibrations in the event of a bearing failure depending on the load and speed of the bearing. The work compares the frequency and time model of the rolling bearing error spectrum. A model of bearing error frequencies was also created, which is supplemented by a force action in the next step. To parameterize the model, data were experimentally measured on a bearing that takes on three possible states. The first bearing has a defect on inner race measuring 0.25 mm, the second bearing 0.5 mm and the third is free of defects. The measurement takes place on a test bed in 135 repetitions. Inventor is used to design the bearing with defect. The measured data are processed and visualized with MATLAB. The measured values show that the rate of vibration is not only dependent on the load and speed, but also the size of the defect.
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Design of software module for paraglider landing simulator
Šulc, Dalibor ; Březina, Lukáš (referee) ; Krejsa, Jiří (advisor)
The aim of this diploma thesis is software designed to simulate landing of the paragliding wing. It means the development of the mathematic model describing the final stage of flight and landing. The model comprises the effects of controls (brakes, speed bar, weight-shifting). One part of the thesis is the description of the implementation in C# language with complete source codes.
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GPS data usability in mobile robot navigation problem
Novák, Pavel ; Věchet, Stanislav (referee) ; Krejsa, Jiří (advisor)
This work is focused on problems of the GPS/DGPS receiver precision used by mobile robot for navigation in outdoor environment. The first part deals with theoretical analysis of GPS, description of it´s functions, errors and their influence on measurements accuracy. Second part deals with practical measurements performed at two locations with different types of obstacles restricting the view to the sky and using the refining methods of measuring the DGPS or so-called differential GPS. The last part of study presents the measured results and its analysis.
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