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Developement of electronics and software on robotic vehicle Car4
Michal, Mikuláš ; Rajchl, Matej (referee) ; Dobossy, Barnabás (advisor)
Tato diplomová práce se zabývá revizí elektroniky robotického vozidla car4 se zaměřením na měření rychlosti otáčení kol, výkonovou a řídicí elektroniku. Car4 posloužilo jako základ pro již přes 20 diplomových prací od roku 2010. To znamenalo, že některé základní aspekty car4 byly zastaralé. Bylo vytvořeno schéma elektroniky vozidla, které bylo dále využito pro vývoj a výrobu nového hardwaru. Komponenty byly poté otestovány a implementovány na vozidlo. Dále byl vytvořen kinematický model 4WS vozidla za použití Ackermanovy geometrie, který byl implenetován a otestován na car4. Dále by měl sloužit jako základ řídicího algoritmu pro budoucí vývoj car4.
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Visual detection of small objects using available tools in MATLAB
Sladký, Jiří ; Dobossy, Barnabás (referee) ; Appel, Martin (advisor)
This thesis investigates possibilities of small object detection in pictures using YOLO method, a deep learning algorithm available in MATLAB. In the thesis, a detector was designed and trained to detect cows from top-down view. A tool was created, that performs detection using the proposed model even on high resolution images and counts the present objects. A generator of synthetic images was programmed, which helped with training the model. Various experiments were performed that found the limits of YOLO and validated contribution of the proposed improvements.
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Development of controller unit for robotic vehicle Car4
Šůstek, Jan ; Adámek, Roman (referee) ; Dobossy, Barnabás (advisor)
This bachelor thesis deals with creation of new control unit for experimental vehicle CAR4. In the first part there are described basic communication protocols and checksum algorithms. In the second part of the work, the electronic diagram of the new control unit and the printed circuit board are designed and control algorithm is optimized. Also there is established communication between control unit and computer and creation of DC motor speed regulation.
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Trajectory planning of Vehicle with Four Independently Steered Wheels
Śniežek, Roman ; Dobossy, Barnabás (referee) ; Brablc, Martin (advisor)
This thesis focuses on a kinematic model of a four-wheel steering vehicle and its simulation. The aim of the thesis is to use the kinematic model and path following algorithms to create a trajectory as a vector of the wheel steering angles dependent on a time and the distance travelled. This trajectory provides a collision-free transfer from starting position to the goal on a map with static obstacles. This could be used in an autonomous vehicle while navigating in a known enviroment
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Segway driver parameter estimation and its use for optimizing the control algorithm
Dobossy, Barnabás ; Zouhar, František (referee) ; Brablc, Martin (advisor)
Táto práca sa zaoberá vývojom, testovaním a implementáciou adaptívneho riadiaceho systému pre dvojkolesové samobalancujúce vozidlo. Adaptácia parametrov vozidla sa uskutoční na základe parametrov vodiča. Parametre sústavy sa nemerajú priamo, ale sú odhadované na základe priebehu stavových premenných a odozvy sústavy. Medzi odhadované parametre patrí hmotnosť a poloha ťažiska vodiča. Cieľom práce je zabezpečiť adaptáciu jazdných vlastností vozidla k rôznym vodičom s rôznou hmotnosťou, kvôli zlepšeniu stability vozidla. Táto práca je pokračovaním predchádzajúcich projektov z roku 2011 a 2015.
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Energy management for robotic vehicle Car4
Dobossy, Barnabás ; Bastl, Michal (referee) ; Najman, Jan (advisor)
This thesis describes the design process and implementation of a measurement unit for state of charge estimation of the batteries of experimental vehicle Car4. The first part is devoted to give insight into why battery monitoring is so important and difficult task at the same time, which is often influenced by ambient effects. The second part describes the design and configuration process and the creation of control algorithm for the central control unit of Car4
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