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Visar resultat 1 - 5 av 8 uppsatser som matchar ovanstående sökkriterier.
1. Sunshade Demonstrator Spacecraft Earth Sphere of Influence Escape Using a Propellant-free AOCS
Master-uppsats, KTH/RymdteknikSammanfattning : This thesis provides insights to what is peculiar about a solar sail attitude and orbit control system and provides the assessment, in the form of a feasibility study, of the effectiveness of sail tip vanes as a control hardware to escape the Earth sphere of influence. The demonstrator aims to prove the technology for the Sunshade project, a constellation of solar sails located at the Lagrangian point L1 to obscure part of the solar radiation directed towards earth. LÄS MER
2. FORESAIL-2 AOCS Trade Studies and Design
Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknikSammanfattning : This thesis aims to design a reliable CubeSat platform, including the avionic subsystems that can sustain a high radiation environment for a mission having a lifetime of at least six months. The science instruments put stringent requirements on the platform to achieve and maintain the desired spin rate. LÄS MER
3. Development and Implementation of a Mass Balancing System for CubeSat Attitude Hardware-in-the-Loop Simulations
Master-uppsats, Luleå tekniska universitet/RymdteknikSammanfattning : Spacecraft simulator platforms can simulate the microgravity environment of space on Earth, for the purposes of testing the Attitude and Orbit Control Subsystem of satellites. In order to do this, the satellite is mounted on a bench and the combined center of mass of this assembly is controlled by a series of moving masses. LÄS MER
4. Experiment Design for System Identification on Satellite Hardware Demonstrator
Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknikSammanfattning : The subject of this thesis covers the process of online parameter estimation of agile satellites. Accurate knowledge of parameters such as moment of inertia and centre of mass play a crucial role in satellite attitude control and pointing performance. LÄS MER
5. Non-linear Model Predictive Control for space debris removal missions
Master-uppsats, Luleå tekniska universitet/RymdteknikSammanfattning : The rapidly increasing amounts of space debris orbiting Earth is threatening to reach a critical level, where the near-Earth environment becomes so overfilled with junk that many missions simply become unfeasible. Long-term active debris removal operations appear to be a necessity, but due to the scale of the problem this will likely be an expensive affair spanning decades or even centuries. LÄS MER
