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Aerial platform for flight time measurements
Schneider, Tibor ; Dvořák, Jan (referee) ; Pokorný, Jiří (advisor)
The bachelor thesis elaborates on creating a mathematical model and realisation of a flying platform. Consequently, it compares results from the mathematical model which simulates flight duration with results which were measured with constructed flying platform. In the first part of the thesis, flying platforms are introduced and also the usability range and what types exist. Matlab was chosen as a language to create the script. In the second part, principle of the matematical model is explained, graphs which explain power influence in UAV movement are presented. There are time dependences of hovering time on different UAV weight, flight distance or outside environment temperature. In the end, there is final comparison of theoretical calculations with measured time values. According to the calculations and measurments, it is more optimal to fly with a speed of 4m/s rather than 1m/s. According to the calculations, distance of 1000m was on the limit, therefore, the measurments were conducted within the range of 600m.
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Urban Air Mobility VTOL personal vehicle design
Polčák, Marek ; Zikmund, Pavel (referee) ; Popela, Robert (advisor)
Diplomová práce se věnuje koncepčnímu návrhu pilotovatelného prostředku pro UAM. V průběhu návrhu byla vyvíjena snaha zachovat původní myšlenku létajícího motocyklu, což vedlo ke zvolení konfigurace multikoptéry. Na základě statistického průzkumu stávajících konceptů a vstupních požadavků bylo možné odhadnout vstupy pro první iteraci návrhu propulzního systému, který sestává z výběru vrtulí, motorů, kontrolérů a předběžného návrhu baterie. Nakonec byla zvolena konfigurace koaxiální kvadrokoptéry. Klíčovou částí koncepčního návrhu je samotná konstrukce, která je navržena jako prutový duralový rám s krytovými prvky z uhlíkového kompozitu. Motory s vrtulemi jsou uchyceny v nosných prstencích, které přináší aerodynamické a konstrukční výhody. Tyto prstence jsou také navrženy z uhlíkového kompozitu, jejichž vrstvová skladba byla navržena tak, aby dokázala bezpečně přenést dané zatížení. Pevnost navržené prutové konstrukce a kompozitních prstenců byla poté zkontrolována pomocí výpočtu metodou konečných prvků. Pevnostní analýza prutové konstrukce pomohla snížit celkovou hmotnost úpravou průřezu použitých kruhových profilů. MKP analýza kompozitního prstence byla provedena pro dynamické zatížení při přechodu do dopředného letu a byla klíčovým nástrojem pro definici vhodné skladby laminátu kompozitních prstenců tak, aby se docílilo kompromisu mezi hmotností a dostatečnou pevností. Největší důraz musel být kladen na napojení prstenců na centrální prutovou konstrukci, jelikož je využito mechanických spojů, které vytváří silné koncentrátory napětí. V těchto místech bylo zapotřebí silně zesílit laminát a využít zalaminovaný duralový plát, jenž pomohl zvýšit pevnost v těchto místech. Kromě kompozitních dílů prstenec využívá duralové součásti, které byly také zkontrolovány výpočtem. VTOL prostředky mohou silně využívat výhod přízemního efektu. K výpočtu letových výkonů ve visu s vlivem přízemního efektu, byla provedena CFD analýza. Vliv přízemního efektu byl zkoumán ve visu ve třech různých vzdálenostech od země. Vliv přízemního efektu na letové výkony byl vyhodnocen na základě výdrže baterie ve visu, pro který je třeba generovat menší tah a spotřebovávat méně elektrické energie, než by bylo třeba ve větší vzdálenosti od země. Druhá část aerodynamických výpočtů se věnovala určení součinitele odporu v dopředném letu, jenž byl zkoumán ve třech různých naklopeních. Výsledky byly dále využity pro výpočet závislosti rychlosti letu na úhlu naklopení, výdrže baterie a dolet. V závěrečné části práce byly navrženy dva možné způsoby provedení řízení a bylo shrnuto přístrojového vybavení, které by umožnilo bezpečný let.
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Aerial platform built on operating system FlytOS
Širjov, Jakub ; Štůsek, Martin (referee) ; Pokorný, Jiří (advisor)
The aim of this bachelor's work is creation of functional model of flying platform that can carry additional devices. The platform is designed to maintain continuous connection with the base station and to create an access point for a particular area. The flying platform has FlyOS installed, which facilitates control of the flying platform. Another part of the work describes steps for simulation of the first automated flight in FlytSIM with a preset parameter of rotation during flight. The platform's functionality is then verified by using manual remote control and also by simulated automated flight in real conditions. Final part shifts attention to the algorithm used for the computation of the rotation of the flight waypoints direction in degrees towards the base station based on the input data. In the case of large distances between the flight waypoints, it computes coordinates and the rotation of the UAV.
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Aerial platform for flight time measurements
Schneider, Tibor ; Dvořák, Jan (referee) ; Pokorný, Jiří (advisor)
The bachelor thesis elaborates on creating a mathematical model and realisation of a flying platform. Consequently, it compares results from the mathematical model which simulates flight duration with results which were measured with constructed flying platform. In the first part of the thesis, flying platforms are introduced and also the usability range and what types exist. Matlab was chosen as a language to create the script. In the second part, principle of the matematical model is explained, graphs which explain power influence in UAV movement are presented. There are time dependences of hovering time on different UAV weight, flight distance or outside environment temperature. In the end, there is final comparison of theoretical calculations with measured time values. According to the calculations and measurments, it is more optimal to fly with a speed of 4m/s rather than 1m/s. According to the calculations, distance of 1000m was on the limit, therefore, the measurments were conducted within the range of 600m.
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Design of folding propeller for UAVs
Dítě, Radovan ; Dvořák, Petr (referee) ; Popela, Robert (advisor)
This master's thesis deals with the design of foldable propeller for UAVs. The design of the foldalble propeller is created based on theory of propellers and also on tha detail ana-lyzis of existing foldalble propellers with similar dimensions. The propeller is then manufac-tured and tested. One of the part of this thesis also describes design of central hub. At the end the methodical procedure of creating foldable propellers is suggested.
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Evaluation of data captured by UAV
Martináková, Veronika ; Setnický, Viktor (referee) ; Kalvoda, Petr (advisor)
The master´s thesis deals with the application of unmanned aerial vehicle (UAV) in photogrammetry and mapping. The first part describes the UAV that was used for imaging, legislative restrictions resulting from its operations, planning and realization of the flight. The second part of this thesis is focused on processing results, especially on evaluation the accuracy of the results gained by UAV with and without a GNSS module. The data are evaluated in the 3rd accuracy rating class (ČSN 01 3410). The theoretical principles are explained as well. The main aim of the thesis is to demonstrate the effective use of the GNSS module Emlid Reach and the unmanned aerial vehicle in geodesy.
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MultiCopter Design
Picek, Matěj ; Pelikán, Petr (referee) ; Zdařil, Zdeněk (advisor)
In my work, I focused on the design of an electric multicopter for common and advanced users. The main objective was to bring a simple practical solution to the dron, which will correspond to the current functional and aesthetic standards of industrial design in the aircraft industry. Whole concept of the dron is designed to be as user-friendly as possible. Thanks to its simplicity, small dimensions and dron structure, it takes a minimal transport space and is almost instantly ready for use.
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Quadrocopter - stabilizace polohy pro autonomní let
MRÁZEK, Aleš
Bachelor thesis deals with general issues of multicopter autonomous space flight. Thesis is divided into several smaller parts, which are subsequently described. Possible solution is demonstrated on the Crazyflie development platform and Kinect sensor along with a computer vision library OpenCV.
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Analysis of multicopter design concepts
Zeman, Petr ; Koštial, Rostislav (referee) ; Dvořák, Petr (advisor)
The main objective of this thesis is to design multicopter with very high flight endurance compared with commonly achieved performances. The beginning is devoted to description of the commonly used terms and components on multicopters with MTOW up to 20kg. This part is followed by detecting dependencies of parameters between themselves from parametric analysis commercially available platforms. Subsequently are investigated factors affecting the efficiency of the propulsion unit like motor location on the arm and the voltage of the battery. Next is done comparison in terms of efficiency of configuration with one motor per arm and two motors in coaxial arrangement. In research the coaxial configuration one part is dedicated to the determination of the efficiency at different speeds of two motors and different directions of propeller rotation relative to each other. Subsequently is determined reference characteristic for efficiency of propulsion units with different weights. Especially in connection with the next part is here shown comparison of Li-Ion and Li-Po battery. The last part is about design multicopter based on previous findings.
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