Sökning: "Spacecraft"

Visar resultat 1 - 5 av 92 uppsatser innehållade ordet Spacecraft.

  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. PPS5000 Thruster Emulator Architecture Development & Hardware Design

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Robert Persson; [2019]
    Nyckelord :Electric Propulsion; Spacecraft; Ground Support Equipment; OHB Sweden; Emulator; Thruster; Elektrisk Framdrivning; Rymdfarkost; Markutrustning; Testutrustning;

    Sammanfattning : This Master's Thesis handles prestudy work and early hardware development that resulted in architectural definitions and prototype hardware of electronic ground support equipment. This equipment is destined to emulate the electric power consumption of the PPS5000 Hall Effect Thruster (HET), for use in satellite end-to-end tests of the all-electric Geostationary Satellite Electra, developed at OHB Sweden AB. LÄS MER

  3. 3. Dynamic Analysis of Sinusoidal, Random and Shock Vibration according to Launch Environment for Small Spacecraft Development to Asteroid 2016-HO3

    Master-uppsats, KTH/Lättkonstruktioner

    Författare :Akhsanto Anandito; [2019]
    Nyckelord :spacecraft; resonance frequency; sinusoidal; random vibration; shock; FEM; rymdfarkoster; resonansfrekvens; sinusformad; slumpmässig vibration; chock; FEM;

    Sammanfattning : The investment of space commerce is skyrocketing and it is predicted to be a nascent business in the future. The spacecraft demand has been growing not only for NASA and other space agency’s mission but also collaboration business between small space industries, academia, and scientific community. LÄS MER

  4. 4. 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

  5. 5. Electron heating in collisionless shocks observed by the MMS spacecraft

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Martin Svensson; [2018]
    Nyckelord :shocks; MMS; electron; heating; gradient; quasi-perpendicular; scaling; plasma; space;

    Sammanfattning : Shock waves are ubiquitous in space and astrophysics. Shocks transform directed particle flow energy into thermal energy. As the major part of space is a collisionless medium, shocks in space physics arises through wave-particle interactions with the magnetic field as the main contributor.The heating processes are scale dependent. LÄS MER