Sökning: "work rotation"

Visar resultat 21 - 25 av 259 uppsatser innehållade orden work rotation.

  1. 21. Trajectory Optimisation of a Spacecraft Swarm Maximising Gravitational Signal

    Master-uppsats, KTH/Optimeringslära och systemteori

    Författare :Rasmus Maråk; [2023]
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  3. 22. Forming wide-orbit planets via pebble accretion

    Master-uppsats, Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Författare :Nerea Gurrutxaga; [2023]
    Nyckelord :Planet Formation; Pebble Accretion; Protoplanetary Disk; Wide-Orbit Planet; Physics and Astronomy;

    Sammanfattning : The possibility that detected substructures in protoplanetary disks, such as gaps, rings and cavities, are created by distant protoplanets has prompted an inquiry into the mechanism responsible for their formation. These wide-orbit young bodies are likely to form relatively rapidly in the outer regions of circumstellar disks. LÄS MER

  4. 23. Beyond Traditional Tomography: X-ray Multi-projection Imaging for Additive Manufacturing

    Kandidat-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Författare :Maria Esther Vilar Alvarez; [2023]
    Nyckelord :X-ray tomography; X-ray multiprojection-imaging; deep learning; additive manufacturing; synchrotron radiation; Physics and Astronomy;

    Sammanfattning : The main aim of this bachelor thesis is to push the limits of 3D X-ray imaging by studying the minimum number of projections required to retrieve high-quality reconstructions for additive manufacturing processes. This project first focuses on understanding how X-ray tomography works, by reconstructing additive manufacturing data already obtained (from PSI, TOMCAT beamline) using two standard reconstruction algorithms, GRIDREC and SIRT. LÄS MER

  5. 24. Design of an Embedded Torque Sensor : Based on Volumetric Strain induced Differential Air Pressure

    Master-uppsats, Mittuniversitetet/Institutionen för elektronikkonstruktion

    Författare :Wen Qi; [2022]
    Nyckelord :Torque; Electronics; Gas sealing; Pressure measurement;

    Sammanfattning : This paper proposes a torque sensor based on the differential air pres- sure measurement method using a new embedded structure. The pro- posed sensor design is an improvement over the previous sensor design. The mechanical sensitivity, resolution, and stress distribution of the new sensor are analyzed by finite element modeling. LÄS MER

  7. 25. Utveckling av vändprocess vid montering av en pump

    M1-uppsats, Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Författare :Filip Björklund; Roderik Svensson; [2022]
    Nyckelord :Produktutveckling; Pumpar; Montering; Vändprocess; Masscentrum; Maskinelement; Snäckväxel; Vridmoment; Rullager;

    Sammanfattning : På industriföretag idag är det svårt att komma ifrån hantering av tunga lyft. När tunga lyft eller rotationer sker på företag står säkerhet och ergonomi i fokus. Det finns olika regler att förhålla sig till på olika företag. LÄS MER