Sökning: "Astrodynamics"

Hittade 4 uppsatser innehållade ordet Astrodynamics.

  1. 1. Optical Navigation for Autonomous Approach of Unexplored Small Bodies

    Master-uppsats, KTH/Rymdteknik

    Författare :Jacopo Villa; [2020]
    Nyckelord :Small Bodies; Asteroids; Comets; Autonomy; SLAM; Mapping; Navigation; Orbit Determination; Astrodynamics; Computer Vision; Feature Tracking; Små Kroppar; Asteroider; Kometer; Autonomi; SLAM; Kartläggning; Navigering; Omloppsbestämning; Astrodynamik; Computer Vision; Feature Tracking;

    Sammanfattning : This thesis presents an autonomous vision-based navigation strategy applicable to the approach phase of a small body mission, developed within the Robotics Section at NASA Jet Propulsion Laboratory. Today, the operations performed to approach small planetary bodies are largely dependent on ground support and human decision-making, which demand operational complexity and restrict the spectrum of achievable activities throughout the mission. LÄS MER

  3. 2. A Heuristic Search Algorithm for Asteroid Tour Missions

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Mohd Bilal; [2018]
    Nyckelord :Asteroids; Astrodynamics; Optimization; Genetic Algorithms; Trajectory Design;

    Sammanfattning : Since the discovery of Ceres, asteroids have been of immense scientific interest and intrigue. They hold answers to many of the fundamental questionsabout the formation and evolution of the Solar System. Therefore, a missionsurveying the asteroid belt with close encounter of carefully chosen asteroidswould be of immense scientific benefit. LÄS MER

  4. 3. Hybrid Differential Dynamic Programming Algorithm for Low-Thrust Trajectory Design Using Exact High-Order Transition Maps

    Master-uppsats, KTH/Rymdteknik

    Författare :Michele Maestrini; [2018]
    Nyckelord :;

    Sammanfattning : Optimal orbital trajectories are obtained through the solution of highly nonlinear large scale problems. In the case of low-thrust propulsion applications, the spacecraft benefits from high specific impulses and, hence, greater payload mass. LÄS MER

  5. 4. An Orbit Control System for UWE-4 Using the High Fidelity Simulation Tool Orekit

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

    Författare :Pouyan Azari; [2017]
    Nyckelord :Orbital mechanics; astrodynamics; small satellites; orbit control;

    Sammanfattning : Cubesats are picosatellites that have a mass of less than 1.3kg and have a shape of acube. As a result of their low cost of development and launch, cubesats are gainingpopularity in industry and academia. These satellites are also a cost-efective way forspace technology demonstrations. LÄS MER