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Quarter-mode four-element antenna array
Janoušek, Jiří ; Fiala, Pavel (referee) ; Raida, Zbyněk (advisor)
Thesis deals with problematics of Compact Circularly Polarized Antenna Based on Quarter-Mode Substrate Integrated Waveguide Sub-Array and process. It also solves a complex structure of microstrip power distribution network. The goal was to create a~physical functioning model of this antenna and to measure its attributes in free space and also near the human body. Theoretical part of this work is taking on the calculation of parameters of the proposed antenna. Practical part is then solving modelation and simulations in program ANSYS HFSS. Physical model of the antenna was not created and some flaws were found in the presented model of the microstrip power distribution network. A possible solutions were proposed to eliminate these flaws.
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Increasing the safety of the outside perimeter
Janoušek, Jiří ; Fiala, Pavel (referee) ; Marcoň, Petr (advisor)
This thesis deals with increasing the safety of the external perimeter. The theoretical part describes the parameters of areas exhibiting an increased safety risk. For these spaces, relevant safety hazards and corresponding elimination methods are determined. Then, the term "drone" is analyzed in the context of its applicability. The practical section characterizes the process of building and configuring unmanned aircraft to guard the perimeter and the designing and fabrication of an automatic charging station for the aircraft. The final part of the thesis is a brief manual describing correct handling of the created system.
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Drone localization and navigation in a familiar environment without GNSS
Pintér, Marco ; Janoušek, Jiří (referee) ; Raichl, Petr (advisor)
This thesis is aimed at development of the localization system without using GNSS. The first part describes technologies, enable determination of position in the area. Methods for determining distance between transmitter and receiver are also described. In the next part of the thesis describes ROS communication form with flight controller PixHawk. On the basis of the acquired knowledge is described choosage of preferred technology and method of determination of the distance between transmitter and receiver.
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Drone swarm control
Kolísek, Josef ; Raichl, Petr (referee) ; Janoušek, Jiří (advisor)
This thesis focuses on the drone swarm control and the using in practice. It is about the interconnection of several control units of drones and subsequent coordination in the air. The work is divided into theoretical part and practical part. The practical part describes the possibilities of drone swarm flying and coordination of multiple drones. Possible ways of communication and transmission of telemetry data for control using the MAVLink protocol. The next part describes the possibilities of controlling multiple units from one central point and creating flight instructions. The practical part deals with the realization of the software for synchronized flight of two unmanned aircraft and their connection with the ground control station for the transmission of flight instructions. The last part of the work deals with evaluation of the control, compliance of the established flight plan and the proposal of other possibilities for improvement with the solution of deficiencies.
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Flight path planning for drone swarms
Procházka, Martin ; Szabó, Zoltán (referee) ; Janoušek, Jiří (advisor)
This bachelor's thesis addresses the issue of planning flight paths for drone swarms with specified safety constrains and with the emphasis on the feasibility of real-world usage. Along with the design of the planning algorithm itself, this thesis also implements an add-on for the 3D environment Blender, which can be used to design a flight mission, verify safety constrains and export the mission itself.
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Drone position stabilization methods using image data
Koukal, Ondřej ; Raichl, Petr (referee) ; Janoušek, Jiří (advisor)
This bachelor’s thesis focuses on the design of an unmanned aircraft stabilization system. The purpose of this system is to determine the exact position of the unmanned aircraft in space based on image data from two cameras in real time. The theoretical part describes the image processing methods and the algorithm for determining the position of the unmanned aircraft. The practical part describes the implementation and testing of the system.
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Communication infrastructure for drone swarm
Kubant, Michal ; Mikulka, Jan (referee) ; Janoušek, Jiří (advisor)
This thesis deals with creation and testing of wireless communication network used for transmission of multimedia and telemetry data in swarm of unmanned aerial vehicles. In the first part of this work are presented functions of the IEEE 802.11ax and their possible usage. The second part if thesis describes configuration of network elements in the wireless network, and discusses maximum transmission speed. The third part presents testing of the assembled network, designs and use of protocols for multimedia streams in a swarm of drones. Also the results are briefly evaluated and illustrated. The fourth part analyzes the methodology of testing the network in the outdoor environment, it discusses the results obtained by using this methodology in different outdoor spaces, and further proposes suitable solutions for improving the efficiency and range of the wireless network.
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Communication Network for a Swarm of Unmanned Aerial Vehicles
Rajm, Jan ; Janoušek, Jiří
This paper deals with the creation of a wireless network for a swarm of unmanned aerial vehicles which enables high enough data throughput for transition of telemetric and application data between unmanned aerial vehicles and ground control station and also enables communication at a greate distance. Even when unmanned aerial vehicles are beyond visual line of sight.
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Fusion of Sensors for Autonomous UAV Navigation
Semerád, Jakub ; Janoušek, Jiří
This paper describes an UAV equipped with a control computer, flight controller, Lidar and depth camera. The UAV telemetrically communicates via the Mavlink communication protocol with a ground station where actual data can be monitored, or the drone's mission can be interfered from there. This whole system produces a 2D map and a 3D color map in real time. This data can be used for obstacle avoidance, object recognition, mapping unknown environments, tracking moving objects and autonomous navigation.
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