Sökning: "solar sailing"

Hittade 5 uppsatser innehållade orden solar sailing.

  1. 1. Non-Disposable and Reusable Solar Sails for Transporting Sunshades to the L1' Point

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Jörgen Smit; Thomas Östervall; [2023]
    Nyckelord :Sunshade Project; L1; Solar sailing;

    Sammanfattning : This study evaluates the feasibility of reusing lightweight solar sails in order to transport 1.69 * 10^6 sunshades, made out of occulting membranes with free-standing SiO2 nanotube films, to the adjusted sun-Earth Lagrange point, L1'. LÄS MER

  3. 2. Consensus Algorithm with Input Constraints and Collision Avoidance for Swarming Sunshade Satellites near the L1 point

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

    Författare :Felicia Törning; [2022]
    Nyckelord :Consensus algorithm; Formation control; Multi agent system; Solar sailing; Space based geoengineering; Konsensusalgoritm; Formationskontroll; multiagent system; solsegel;

    Sammanfattning : Swarm Control Theory studies how multi-agent systems interact to solve tasks cooperatively. In this thesis it was studied how graph theory and the Dynamic Average Consensus Algorithm can be used to control swarming sunshade satellites near L1 for global temperature control, and if it would be suitable for the purpose. LÄS MER

  4. 3. Electric propulsion of satellites as an alternative for implementation of a sunshade system

    Kandidat-uppsats, KTH/Fysik

    Författare :Maheen Arfan; Isabelle Bonnier; [2022]
    Nyckelord :Geoengineering; Sunshade system; Electric propulsion; Orbital mechanics; Sub-lagrange;

    Sammanfattning : As an alternative solution to global warming, this thesis explores the possibility of aspace-based geoengineering scheme that may prove worthwhile to implement in parallel toother environmental efforts that help mitigate impact of climate change. One suggestionof a geoengineering solution is deploying a large number of sunshades in the vicinity ofthe first Lagrange point of the Sun-Earth system, and this prospective sunshade projectwould serve to shield Earth from incident solar radiation. LÄS MER

  5. 4. Attitude control using ion thrusters for solar sailing from Low Earth Orbit to sub-L1

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Celeste Holm; Ida Ygland; [2022]
    Nyckelord :the sunshade project; geoengineering; solar sailing; attitude control; ion thrusters;

    Sammanfattning : The purpose of the study is to evaluate the possibility of using gridded ion thrusters as a means of attitude control for a solar sail as a part of the sunshade project, which aims to place 10^8 solar sail sunshade spacecraft, each with an area of about 10 000 m^2, at the Sun-Earth Lagrangian point L1 in order to reduce Earth's global temperature. Two types of solar sail sunshade spacecraft were studied. LÄS MER

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

    Master-uppsats, KTH/Rymdteknik

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

    Sammanfattning : 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