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Visar resultat 1 - 5 av 19 uppsatser som matchar ovanstående sökkriterier.

1. 1. Autonomous Propulsion for a GPR-UGV

   Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

   Författare :Fredrik Wall Eskilsson; [2022]
   Nyckelord :robotics; gpr; autonomous; robot; ros; slam;

   Sammanfattning : This thesis presents the research and development behind the integration of an autonomous propulsion system for a four-wheeled Ground Penetrating Radar (GPR) measurement unit, previously requiring manual operation. In order to ease the administration of the complex new system, Robot Operating System (ROS) 2 was used as middleware, where an implementation of Light Detection And Ranging (LiDAR) 3D-SLAM (Simultaneous Localization And Mapping) served to secure precise localization of the Unmanned Ground Vehicle (UGV) and mapping of its environment. LÄS MER

3. 2. Development of Test Methodologies and Setups for Thrust Measurements of Cold Gas Micro-thrusters for CubeSats

   Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

   Författare :Aleksander Kipiela; [2022]
   Nyckelord :Thrust measurements; cold gas propulsion; micro thrusters; hanging pendulum; CubeSat; Dragkraftsmätning; kallgasframdrivning; mikrodysor; hängande pendel; CubeSat;

   Sammanfattning : Measuring the thrust of cold gas micro-thrusters, due to the small magnitude of the generated force, is a challenging task, and to obtain satisfying quality of results usually careful adjustments of the setup has to be performed. The work presented in this paper aims at improving the quality of such measurements at the GomSpace Sweden company. LÄS MER

4. 3. Hydroacoustic Modelling of Podded Propulsion System : Underwater Radiated Noise Prediction Using ANSYS

   Master-uppsats, KTH/Teknisk mekanik

   Författare :Martin Persson; [2022]
   Nyckelord :Fluid Mechanics; Computational Aeroacoustics; Frequency Response; Noise and Vibration; Pod; Propulsion System; ANSYS; Reynolds-Averaged Navier-Stokes Equations; Kongsberg Maritime Sweden AB;

   Sammanfattning : Ocean noise pollution is an invisible but growing threat. There are many sources of sound in the ocean but human underwater radiated noise, in particular from shipping is one of the most prominent one. Ocean noise pollution can interfere or sometimes even directly harm marine life. LÄS MER

5. 4. Parametric study on hybrid rocket propulsion system performance measured by the system specific impulse

   Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Författare :Adam Bussmann; [2022]
   Nyckelord :Hybrid; Hybrid propulsion; Hybrid propulsion system; System specific impulse;

   Sammanfattning : Hybrid rocket motors have become of great international interest during the last couple of years. A hybrid rocket motor is propelled by the use of a solid fuel and a liquid oxidizer. The fundamental principle of the hybrid propelled system is that the liquid oxidizer is injected into a combustion chamber to enable the combustion of the solid fuel. LÄS MER

7. 5. Hardware-in-the-loop simulation and testing of the ADCS of the Beyond Atlas CubeSat

   Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :Kritee Mahanti; [2021]
   Nyckelord :space; HIL; CubeSat; ADCS; satellites; rymd; HIL; CubeSat; ADCS; satelliter;

   Sammanfattning : Beyond Atlas, a company based in Danderyd, Sweden is working on a Low Earth Orbit (LEO) 3U-CubeSat (Cube Satellite) exploration mission. As part of their maiden mission, they aim to validate the navigation, propulsion, and communication techniques of a CubeSat while it performs orbital maneuvers to collect photographs of space debris. LÄS MER