Essays about: "AOCS"

Showing result 1 - 5 of 8 essays containing the word AOCS.

1. 1. Sunshade Demonstrator Spacecraft Earth Sphere of Influence Escape Using a Propellant-free AOCS

   University essay from KTH/Rymdteknik

   Author : Leonardo Ricci; [2021]
   Keywords : Solar sail; Solar radiation pressure; Attitude control; Escape trajectory; Centre of pressure; Disturbance Torques; Eclipse.; Solsegel; Solstrålningstryck; Attitydkontroll; Flyktbana; Tryckcentrum; Störningsmoment; Eclipse.;

   Abstract : 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. READ MORE

3. 2. FORESAIL-2 AOCS Trade Studies and Design

   University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Author : Guillaume Le Bonhomme; [2020]
   Keywords : space engineering; CubeSat; ADCS; AOCS; spacecraft subystems; nanosatellite;

   Abstract : 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. READ MORE

4. 3. Development and Implementation of a Mass Balancing System for CubeSat Attitude Hardware-in-the-Loop Simulations

   University essay from Luleå tekniska universitet/Rymdteknik

   Author : Guillermo Ledo López; [2019]
   Keywords : hil; hardware in the loop; simulation; satellite; simulator; platform; simulink; matlab; least squares; aocs; testing; attitude; dynamics; control;

   Abstract : 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. READ MORE

5. 4. Experiment Design for System Identification on Satellite Hardware Demonstrator

   University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Author : Elias Krantz; [2018]
   Keywords : LTU; Airbus; Attitude; Guidance; Control; AOCS; GNC; Kalman Filter; UKF; System Identification; SysId; Estimation; Determination; CMG;

   Abstract : 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. READ MORE

6. 5. Non-linear Model Predictive Control for space debris removal missions

   University essay from Luleå tekniska universitet/Rymdteknik

   Author : Alexander Korsfeldt Larsén; [2018]
   Keywords : ;

   Abstract : 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. READ MORE