Sökning: "controlled excitation"

Visar resultat 1 - 5 av 27 uppsatser innehållade orden controlled excitation.

  1. 1. Resonance Mitigation in the Attitude Control of a Flexible Large Solar Sail

    Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Författare :Jonas Linnros; [2023]
    Nyckelord :Resonance; Control theory; Mechanics; Solar sail; PID; Space; Resonans; Reglerteknik; Mekanik; Solsegel; PID; Rymd;

    Sammanfattning : This project is about the design process of a resonancemitigating algorithm for a large solar sail. The solar sail isa structure made up by four long booms in a cross patternwith suspended sails between the edges of the booms. Thespacecraft in this report is controlled using smaller rotatingsails at each tip of the booms. LÄS MER

  3. 2. Optimization and Characterization of Luminescent Materials for the ESS Proton Beam Imaging System

    M1-uppsats, Lunds universitet/Centrum för analys och syntes

    Författare :Emelie Wiklund; Anton Järild; [2021]
    Nyckelord :Chemical Engineering; Luminescent materials; Cr-doped Alumina; Proton Beam Imaging System; ESS; Chemistry; Technology and Engineering;

    Sammanfattning : Spallation sources such as European Spallation Source (ESS) produces neutrons by bombarding high-energy protons onto the target wheel. To determine the location of the proton beam a Proton Beam Imaging (PBI) system will be installed. LÄS MER

  4. 3. Correcting biological infrared spectroscopy data for atmospheric gases and Mie scattering

    Master-uppsats, Lunds universitet/Beräkningsbiologi och biologisk fysik - Genomgår omorganisation

    Författare :Stéphan Pissot; [2020]
    Nyckelord :FTIR; spectroscopy; chemometrics; infrared absorption microscopy; atmospheric correction; scattering correction; Physics and Astronomy;

    Sammanfattning : Infrared absorption microscopy is a powerful chemometric tool with a wide variety of applications. It is, however, subject to considerable disturbances from atmospheric gases and scattering effects. LÄS MER

  5. 4. Utveckling av koncept för att reglera reaktiv effekt vid generatordrift via PLC : Framtagande och provning av prototyp

    M1-uppsats, Linnéuniversitetet/Sjöfartshögskolan (SJÖ)

    Författare :Erik Gran; Erik Hård; [2019]
    Nyckelord :reactive effect; reactance; reactivity; capacitance; capacitivity; inductance; inductivity; generator; phase compensation; microprocessor; PLC; arduino; potentiometer; reaktiv effekt; reaktans; reaktivitet; kapacitans; kapacitivitet; induktans; induktivitet; generator; faskompensering; mikroprocessor; PLC; arduino; potentiometer;

    Sammanfattning : I projektet utreds möjligheterna kring att kunna kontrollera en generators reaktiva effektproduktion genom att styra magnetiseringsströmmen från en PLC. Som metod för styrning från PLC beslutades att en signal på 0-5V skulle användas. LÄS MER

  7. 5. Dynamic Soil-Structure Interactionof Soil-Steel Composite Bridges : A Frequency Domain Approach Using PML Elements and Model Updating

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :DIEGO FERNANDEZ BARRERO; [2019]
    Nyckelord :Dynamics; soil-steel bridges; soil-structure interaction; model updating; PML; particle swarm; corrugated steel plates; frequency domain assurance criteria; parallel computing 2;

    Sammanfattning : This master thesis covers the dynamic soil structure interaction of soil-steel culverts applyinga methodology based on the frequency domain response. At the first stage of this masterthesis, field tests were performed on one bridge using controlled excitation. LÄS MER