Essays about: "continuous thrust"

Showing result 1 - 5 of 7 essays containing the words continuous thrust.

  1. 1. Validation of the attitude control of KNATTE with flexible appendages

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Christoffer Johansson; [2022]
    Keywords : KNATTE; flexible appendages; control; SMC; LQG; PWM; PWPF;

    Abstract : The effect of flexible panels on a spacecraft during attitude movement may induce problems if not correctly accounted for in the control system for the spacecraft. The aim of this thesis is to find and evaluate, control algorithms that could be suitable for the Kinesthetic Node and Autonomous Table-Top Emulator (KNATTE) with two flexible mock-up solar panels during an attitude movement of 20 degrees. READ MORE

  3. 2. Networked Model Predictive Control for Satellite Formation Flying

    University essay from Luleå tekniska universitet/Rymdteknik

    Author : Damiana Catanoso; [2019]
    Keywords : Satellite Formation Flying; Model Predictive Control;

    Abstract : A novel continuous low-thrust fuel-efficient model predictive control strategy for multi-satellite formations flying in low earth orbit is presented. State prediction relies on a full nonlinear relative motion model, based on quasi-nonsingular relative orbital elements, including earth oblateness effects and, through state augmentation, differential drag. READ MORE

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

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Pouyan Azari; [2017]
    Keywords : Orbital mechanics; astrodynamics; small satellites; orbit control;

    Abstract : 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. READ MORE

  5. 4. Constrained Low-Thrust Satellite Formation-Flying Using Relative Orbit Elements : Autonomous Guidance and Control for the NetSat Satellite Formation-Flying Mission

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Lukas Steindorf; [2017]
    Keywords : satellite; formation; control; guidance; continuous; low-thrust;

    Abstract : This thesis proposes a continuous low-thrust guidance and control strategy for satellite formation-flying. Stabilizing feedback based on mean relative orbit elements and Lyapunov theory is used. A novel feedback gain matrix inspired by the fuel-optimal impulsive solution is designed to achieve near-optimal fuel consumption. READ MORE

  6. 5. Pressure-Temperature-time Constraints on the Deep Subduction of the Seve Nappe Complex in Jämtland and southern Västerbotten, Scandinavian Caledonides

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Johanna Holmberg; [2017]
    Keywords : Seve Nappe Complex; COSC-1; Raman spectroscopy; QuiG barometry; kyanite-garnet gneiss; Lu-Hf garnet geochronology; Seveskollan; COSC-1; Raman spektroskopering; QuiG barometri; kyanit-granatförande gnejs; Lu-Hf granat geokronologi;

    Abstract : The Scandinavian Caledonides are defined by long transported thrust sheets emplaced in a nappe stratigraphic succession onto the Paleozoic Baltica platform, as a result of the collision between the paleo-continents Baltica and Laurentia. This Palaeozoic collisional orogen is nowadays exposed at mid-crustal levels, thus provides an excellent ground for in situ studies of mountain building processes. READ MORE