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Construction of laboratory model "Ball on Spool"
Pohludka, Jan ; Appel, Martin (referee) ; Dobossy, Barnabás (advisor)
This thesis is primarily about designing laboratory model Ball on Spool. The first part of this thesis describes modelling of the system, calculation of parameters, design of the control and simulation, based on which the requirements for the actuator are determined. Secondly, this thesis outlines the design of physical model based on simulation results. All of the components used are described, together with the electrical circuit. Parameters of the physical model are estimated using measured data from experiments. The last part is about designing a control of physical model and its demonstration. This thesis also includes a user manual.
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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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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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Sensor fusion for detecting and locating people in a room
Vondráček, Jakub ; Dobossy, Barnabás (referee) ; Najman, Jan (advisor)
This diploma thesis deals with the problem of fusion of several sensors for the purpose of detecting and locating people in a room. It is primarily about using measured sensors and implementing them in such a way that their connection creates a system that has obvious advantages compared to more expensive single sensor solutions. In the first part of the work, research is carried out, which presents the basic issues of detection, localization and counting of people in rooms. To be used in the practical part of the work, it is also indicated here which specific sensors can be used to achieve these functions and which control units are suitable for such a system. Finally, it summarizes specific components and software tools, which are further supplemented in the practical part of the work. The rationale for this selection is also included. The second part of the thesis describes the specific design of the resulting system, which can perform the functions of detection, localization and counting of people in the room. This practical proposal is described including all starting points, connections and especially the algorithm that was used for sensor fusion. The entire system is subsequently tested, based on which its functioning is evaluated. In the last section of the thesis, the created system is supplemented with a model of a cover and wall mount.
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Design and implementation of a pneumatic educational model
Javorek, David ; Dobossy, Barnabás (referee) ; Najman, Jan (advisor)
The bachelor thesis deals with creating an educational pneumatic model and its subsequent simulation. The research section describes the possibilities and types of control of pneumatic actuators. Furthermore, their modelling in Simulink using Simscape blocks is explained here. In the practical part of the work is given the procedure of creating an educational model, how their control and data collection from sensors is solved. Finally, the modelling of the simulation is explained.
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Predictive maintenance with wireless data transfer
Pernica, Michal ; Najman, Jan (referee) ; Dobossy, Barnabás (advisor)
This thesis deals with predictive maintenance and the use of NB-IoT network for its purpose. In the first part of the thesis, the wireless technologies for data transmission are presented, followed by a description of the different types of communication protocols, and lastly, the process of developing predictive maintenance is described. In the second part of the thesis, a server application for predictive maintenance purposes is presented, system control using a microcontroller, the NB-IoT module SIM700E is introduced along with its specifications, connection to the NB-IoT network and implementation of the MQTT protocol. Also, the server software composed of the MQTT broker, Node-Red, Influx DB and Grafana is described. The third section describes the application of predictive maintenance on two devices, namely a thermal chamber and a pneustand. The function of these systems is described, followed by the modifications applied. Afterwards, the fault conditions we want to detect are mentioned and then classifiers are trained to determine the condition. Finally, the control of the systems is redesigned so that it can be done using a microcontroller. Finally, experiments are performed while operating the device and verifying the functionality of predictive maintenance to identify the condition.
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