Sökning: "Hybrid Propulsion"

Visar resultat 21 - 25 av 43 uppsatser innehållade orden Hybrid Propulsion.

  1. 21. 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

  3. 22. Optimization Methods for Hybrid Electric Vehicle Propulsion System

    Master-uppsats, KTH/Energiteknik

    Författare :Zhongling Ren; [2018]
    Nyckelord :;

    Sammanfattning : Design of hybrid vehicles is a hot topic because of the strict restriction on the emissions of the vehicle. The optimal design of hybrid vehicles becomes necessary to reduce the cost or emissions of the vehicle. LÄS MER

  4. 23. Numerical approach of a hybrid rocket engine behaviour : Modelling the liquid oxidizer injection using a Lagrangian solver

    Master-uppsats, KTH/Mekanik

    Författare :Gustave Sporschill; [2017]
    Nyckelord :Hybrid propulsion; combustion; numerical simulations; two-phase flow; La-grangian approach;

    Sammanfattning : To access and operate in space, a wide range of propulsion systems has been developed, from high-thrust chemical propulsion to low-thrust electrical propulsion, and new kind of systems are considered, such as solar sails and nuclear propulsion. Recently, interest in hybrid rocket engines has been renewed due to their attractive features (safe, cheap, flexible) and they are now investigated and developed by research laboratories such as ONERA. LÄS MER

  5. 24. Current ripple simulation of the electric system of an electric bus

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Industriell elektroteknik och automation

    Författare :Christian Lugnberg; David Wenander; [2017]
    Nyckelord :Electromobility; electric propulsion system; current ripple; hybrid vehicles; simulation model; power electronics; LTspice; Technology and Engineering;

    Sammanfattning : With effect of global warming and climate change the electrification of vehicles enables a more sustainable and environmentally friendly alternative to conventional vehicles as it reduces toxic emissions and overall energy consumption. Different extents of electrification is today used. Hybrid and electric vehicles are two examples. LÄS MER

  7. 25. Eldrift inom skärgårdstrafiken : Ekonomiskt försvarbart eller en ren förlustaffär?

    M1-uppsats, Linnéuniversitetet/Sjöfartshögskolan (SJÖ)

    Författare :David Niklasson; Nicklas Karlsson; [2016]
    Nyckelord :Hybrid; Battery propulsion; Archipelago; Koster Marin; Conversion; Kosterbris; Hybriddrift; Batteridrift; Skärgårdstrafik; Koster Marin; Konvertering; Kosterbris;

    Sammanfattning : Allt eftersom tekniken utvecklas blir elektrisk framdrift ett adekvat alternativ till konventionellt dieselmaskineri, särskilt inom den svenska skärgårdstrafiken eftersom det ofta handlar om korta distanser. En av de allra viktigaste faktorerna vid ett nybygge eller en konvertering av ett fartyg är kostnaden. LÄS MER