Essays about: "Rymdfarkost"

Showing result 1 - 5 of 13 essays containing the word Rymdfarkost.

  1. 1. Plume-Spacecraft Interaction Analysis : Study on the Plume Effects of Hall-Effect Thrusters (HET) and High-Efficiency Multistage Plasma Thrusters (HEMPT).

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Josep Sentís Garzón; [2023]
    Keywords : Electric propulsion; Plasma plume; Plasma physics; SPIS; OpenPlume EP; Modelling; Charge-Exchange Collisions; Elektrisk framdrivning; Plasma plym; Plasmafysik; SPIS; OpenPlume EP; Modellering; Laddningsväxlingskollisioner;

    Abstract : Plume-spacecraft interactions play an important role in the performance and integrity of spacecraft during their missions in space. The study encompasses a thruster’s plume simulation and its impact on spacecraft geometries to understand and predict the effects and consequences of the impingement on spacecraft surfaces, such as erosion, contamination, forces, and torques. READ MORE

  3. 2. Trajectory Optimisation of a Spacecraft Swarm Maximising Gravitational Signal

    University essay from KTH/Optimeringslära och systemteori

    Author : Rasmus Maråk; [2023]
    Keywords : Spacecraft Swarms; Trajectory Optimisation; Impulsive Manoeuvres; Evolutionary Algorithms; Polyhedral Gravity Model; Small Body Exploration; Discrete Spherical Grids; Svärmande rymdfarkoster; Banoptimering; Impulsiva manövrar; Evolutionära Algoritmer; Polyhedral gravitationsmodell; Utforksning av små kroppar i solsystemet; Diskreta sfäriska rutnät;

    Abstract : Proper modelling of the gravitational fields of irregularly shaped asteroids and comets is an essential yet challenging part of any spacecraft visit and flyby to these bodies. Accurate density representations provide crucial information for proximity missions, which rely heavily on it to design safe and efficient trajectories. READ MORE

  4. 3. Investigation of a Novel Atmosphere-Breathing Electric Propulsion Platform and Intake

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Kun Feng; [2023]
    Keywords : ABEP; VLEO; DSMC; FMF; Orbital Aerodynamics; ABEP; DSMC; VLEO; FMF; Orbital Aerodynamics;

    Abstract : Very Low Earth Orbit (VLEO) provides many benefits for space missions, including better image resolution for Earth observation, better telecommunication link with ground stations, lower launch cost, lower risk of collisions, and fast end-of-life disposal. The last point in benefit is also the main challenge for placing satellites in VLEO. READ MORE

  5. 4. Risk computation for atmospheric re-entry

    University essay from KTH/Rymdteknik

    Author : Florian Teilhard; [2021]
    Keywords : Spacecraft Dynamics; Atmospheric re-entry; Rymdfarkosters dynamik; Atmosfäriska återinträdet;

    Abstract : In the present work, two numerical tools are under scrutiny. Both were made to study the atmospheric re-entry of a spacecraft: DEBRISK computes the trajectory and the survivability of the spacecraft as well as its fragments, and ELECTRA calculates the trajectory of the spacecraft and its fragments, as well as the associated on-ground risk of human casualty. READ MORE

  6. 5. Improved Release Mechanisms for Aerospace Applications

    University essay from Uppsala universitet/Tillämpad mekanik

    Author : Baran Hamad; Markus Englund; [2021]
    Keywords : release mechanisms; hdrm; split spool initiator; reusable; smart materials; shape memory alloy; sma; pyrotechnic; non-explosive; spacecraft; nitinol; releasemekanismer; hdrm; fästelement; split spool-initierare; återanvändbar; minnesmetall; pyrotekniska; icke-explosiva; rymdfarkost; nitinol;

    Abstract : Hold down release mechanisms (HDRMs) are used for tightly attaching segments of bodies together when it is desired to release them rapidly at some point. When transporting sensitive payloads on launch vehicles, the challenge arises of releasing the fastened segments of the spacecraft without risking damage to the costly equipment. READ MORE