Sökning: "aocs"

Visar resultat 1 - 5 av 6 uppsatser innehållade ordet aocs.

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

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

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

    Sammanfattning : 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

  2. 2. Experiment Design for System Identification on Satellite Hardware Demonstrator

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

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

    Sammanfattning : 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

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

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Alexander Korsfeldt Larsén; [2018]
    Nyckelord :;

    Sammanfattning : 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

  4. 4. Analysis of Passive Attitude Stabilisation and Deorbiting of Satellites in Low Earth Orbit

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

    Författare :Benjamin Hawe; [2016]
    Nyckelord :electrodynamic; electrodynamic tether; EDT; drag augmentation; drag sail; drag balloon; passive attitude stabilisation; passive; attitude; stability; low earth orbit; LEO; deorbit; de-orbit; Post Mission Disposal; TeSeR;

    Sammanfattning : Orbital debris poses a serious threat to ongoing operations in space.  Recognising this threat, the European Commission has funded the three-year Technology for Self Removal (TeSeR) project with the goal of developing a standard scalable Post Mission Disposal (PMD) module to remove satellites from orbit following the completion of their mission. LÄS MER

  5. 5. Innovative Gyroless Attitude Estimation Method

    Master-uppsats, KTH/Mekanik

    Författare :Paul Dermarkar; [2013]
    Nyckelord :;

    Sammanfattning : A key aspect in Attitude and Orbital Control Systems (AOCS) is the ability to estimateaccurately a spacecraft’s attitude and angular rate. While a classic gyrometer and star-trackerhybridization features high performances, gyroless solutions using only star-trackers as attitudesensors are often chosen to reduce the mission’s cost, when possible. LÄS MER