Search for dissertations about: "UAV"

Showing result 1 - 5 of 34 swedish dissertations containing the word UAV.

  1. 1. Increasing Autonomy of Unmanned Aircraft Systems Through the Use of Imaging Sensors

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Piotr Rudol; Andrzej Szalas; Pascual Campoy; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; UAV; UAS; UAV autonomy; human-body detection; color-thermal image fusion; vehicle tracking; geolocation; UAV indoor navigation;

    Abstract : The range of missions performed by Unmanned Aircraft Systems (UAS) has been steadily growing in the past decades thanks to continued development in several disciplines. The goal of increasing the autonomy of UAS's is widening the range of tasks which can be carried out without, or with minimal, external help. READ MORE

  2. 2. Mission optimized jet engines for a low-signature reconnaissance UAV

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Markus Wallin; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gas turbine; jet engine; stealth; signature; optimization; uav;

    Abstract : .... READ MORE

  3. 3. Vortex generator modeling and its application to optimal control of airflow in inlet

    University dissertation from Stockholm : KTH

    Author : Adam Jirásek; Arthur Rizzi; John W Slater; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vortex generator; vortex generator model; flow control; design and optimization; DOE; CFD; UAV; inlet; S-duct; pressure distortion; pressure recovery; TECHNOLOGY Engineering mechanics Vehicle engineering; TEKNIKVETENSKAP Teknisk mekanik Farkostteknik;

    Abstract : This dissertation deals with the development of the vortex generator model and its use for the optimization study of vortex generator flow control in high-offset-ed inlets. In the first part, the overview of use of vortex generators and their mechanism is outlined. READ MORE

  4. 4. Towards Aerial Robotic Workers

    University dissertation from Luleå tekniska universitet

    Author : Emil Fresk; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Information technology - Automatic control; Aerial Robotic Worker; UAV; Multirotor; Quadrotor; Estimation; Quaternion; Inertial Navigation; Informationsteknik - Reglerteknik; Reglerteknik; Control Engineering;

    Abstract : The aim of this thesis is to advance the control and estimation schemes for multirotors, and more specifically the Aerial Robotic Worker, in order to progress towards the necessary control and estimation performance for robust control, cooperation and collaboration. Towards this envisioned aim, this Licentiate thesis will present the following main research contributions: a) a singularity-free attitude controller for the attitude problem has been established, that does not have the inherent drawbacks of Euler angle or Direction Cosine Matrix based approaches, b) a generalized estimation scheme for attitude, position and parameter estimation will be presented that has the merit of low computational footprint, while it is robust towards magnetic disturbances and able to identify key parameters in the model of an Aerial Robotic Worker, c) an method for estimating the induced vibration frequencies on the multirotor’s frame, and the respective amplitudes, that relies on notch filtering for attenuating the induced vibrations, and d) a theoretical establishment, as well as an experimental development and evaluation of a variable pitch propeller model to add additional degrees of freedom and increase the robustness of an Aerial Robotic Worker. READ MORE

  5. 5. Cryptic Orogeny uplift of the Al Hajar Mountains at an alleged passive margin

    University dissertation from Stockholm : Department of Geological Sciences, Stockholm University

    Author : Reuben Johannes Hansman; Ring Uwe; Joachim Jacobs; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; uplift; mountains; structural; low-temperature; thermochronology; dating; fission-track; U-Th He; U-Pb; calcite; structure-from-motion; photogrammetry; UAV; trishear; fault-propagation; Hafit; Al Hajar Mountains; United Arab Emirates; Oman; Geology; geologi;

    Abstract : Mountains evolve and grow because of the large forces that occur from the collision of tectonic plates. Plate boundaries change and move through time, and regions that were once stable, shallow-marine environments can be dragged into subduction zones and get transformed into vast mountain ranges. READ MORE