Sökning: "Thruster"

Visar resultat 21 - 25 av 49 uppsatser innehållade ordet Thruster.

  1. 21. Intake Design, and Optimization for an Atmosphere- Breathing Electric Propulsion System

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Jesus Espinosa Orozco; [2020]
    Nyckelord :Atmospheric Intake; ABEP; Electric Propulsion; Plasma; VLEO;

    Sammanfattning : Over the last two decades, Very Low Earth Orbit (VLEO) has gained researchers attention as it provides a significant amount of benefits in the field of earth observation and telecommunications. VLEO provides increased payload performance, improved geospatial accuracy, lower launch mass, simplified end of life disposal, and they reduce space-debris collision risk. LÄS MER

  3. 22. Analysis of Hall effect thrusters using Hybrid PIC simulations and coupling to EP plume

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :David Villegas Prados; [2020]
    Nyckelord :Hallis; SPIS; EP; plume; hybrid PIC; Hall effect; HET; inside channel; plume expansion;

    Sammanfattning : In the last 30 years, numerical models have been developed to properly analyze Hall eect thrusters (HET),leading to a bridge between analytical prediction/empirical intuition and experiments. For companies in thespace sector, these codes serve to much more than simply simulating the thruster, but it provides a fast, cheapand reliable tool for processes such as validation and verication procedures, as well as for technical developmentof the thruster. LÄS MER

  4. 23. Spacecraft & Hybrid Rocket Motor Flight Model Design for a Deep Space Mission : Scalable Hybrid Rocket Motor for Small Satellite Propulsion

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Pau Molas Roca; [2019]
    Nyckelord :Scalable; Hybrid Rocket Motor; Simulation Algorithm; Small Satellites; Space exploration;

    Sammanfattning : In this thesis, the design and particularities of a unique and revolution- ary scalable propulsion system are presented. A spacecraft mechanical design is included together with a mission definition, aiming to provide a context for a technology demonstration in space of an Hybrid Rocket Motor (HRM) as satellite thruster. LÄS MER

  5. 24. EM emissions test platform implementationfor satellite electric propulsion systems andelectronic subsystems

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Siiri Talvistu; [2019]
    Nyckelord :Electromagnetic compatibility; electromagnetic emissions; compliance; ion thruster;

    Sammanfattning : Modern gridded ion thrusters for CubeSats operate by generating high power and canpose challenging problems with Electromagnetic Interference (EMI). In order to verifycompatibility with neighbouring equipment, strict standards such as the militarystandard MIL-STD-461G, are required to be followed to achieve ElectromagneticCompatibility (EMC). LÄS MER

  7. 25. Nonlinear MPC for Motion Control and Thruster Allocation of Ships

    Master-uppsats, Linköpings universitet/Reglerteknik

    Författare :Alexander Bärlund; [2019]
    Nyckelord :MPC; nonlinear MPC; model predictive control; thruster allocation; thrust allocation; motion control; motion control system; ship; dynamic positioning; azimuth; azipod;

    Sammanfattning : Critical automated maneuvers for ships typically require a redundant set of thrusters. The motion control system hierarchy is commonly separated into several layers using a high-level motion controller and a thruster allocation (TA) algorithm. LÄS MER