Sökning: "active maintenance"

Visar resultat 21 - 25 av 120 uppsatser innehållade orden active maintenance.

  1. 21. Load Control Aerodynamics in Offshore Wind Turbines

    Master-uppsats, KTH/Kraft- och värmeteknologi

    Författare :Lorenzo Cantoni; [2021]
    Nyckelord :Wind Turbine; Offshore; Blade; Rotor; Computational Fluid Dynamics; Airfoil; Aerodynamic; Aeroelasticity; Simulation; Fluid; Structure; Interaction; Loads; Control; Response; Harmonics; Vibration; Damping; Flutter; Trailing Edge; Flaps; Wind Gust; Lift; Drag; Unsteady; Pressure; Velocity; Vindkraftverk; offshore; blad; rotor; beräkningsvätske-dynamik; flygplatta; aerodynamisk; aeroelasticitet; simulering; vätska; struktur; interaktion; belastningar; kontroll; respons; övertoner; vibrationer; dämpning; fladdring; bakkant; klaffar; vindstöt; lyft; Drag; ostadig; tryck; hastighet;

    Sammanfattning : Due to the increase of rotor size in horizontal axis wind turbine (HAWT) during the past 25 years in order to achieve higher power output, all wind turbine components and blades in particular, have to withstand higher structural loads. This upscalingproblem could be solved by applying technologies capable of reducing aerodynamic loads the rotor has to withstand, either with passive or active control solutions. LÄS MER

  3. 22. Predicting asset degradation in industrial motors

    Master-uppsats, Uppsala universitet/Institutionen för informationsteknologi

    Författare :Christian Gullberg; [2021]
    Nyckelord :;

    Sammanfattning : Maintenance and repairs constitutes a large part of the production costs in the oil and gas industry. Companies active in the North Sea area has seen a dramatic increase in maintenance costs duringthe last ten years. One of the reasons being aging equipment due to unwillingness for new investments. LÄS MER

  4. 23. Time Series Active Learning using Automated Feature Extraction

    Master-uppsats, Lunds universitet/Matematisk statistik

    Författare :William Lindskog; [2021]
    Nyckelord :Machine Learning; Active Learning; Time Series; Artificial Intelligence; Feature Extraction; Predictive Maintenance; Mathematics and Statistics;

    Sammanfattning : Time series classification is a prevalent problem for sensor data in an industrial setting. The ability to classify time series correctly allows for predictive maintenance which is the process of optimally maintaining assets and ensuring minimal ”down-time” of machines or processes. LÄS MER

  5. 24. Effects of active and passive conservation on forest structure and bird diversity in Färna Ecopark

    Kandidat-uppsats, SLU/School for Forest Management

    Författare :Arvid Sandström; [2021]
    Nyckelord :biodiversity; deciduous forest; avifauna;

    Sammanfattning : Voluntary set-asides are an important part of the conservation of forest species in Sweden. Set aside stands are either treated passively by leaving them untouched (in Swedish abbreviated as NO) or with active, often invasive maintenance (NS). LÄS MER

  7. 25. Vätgasdrivna arbetsmaskiners tekniska mognad : Dagens etableringsmöjligheter och potentiella tillämpningar i Gävleborgs framtida vätgassamhälle

    Kandidat-uppsats, Högskolan i Gävle/Miljövetenskap

    Författare :Selinn Lärkfors; Carolina Svedlund; [2021]
    Nyckelord :hydrogen; Technology Readiness Level; technical maturity; non-road machinery vehicle; wheel loader; snow groomer; street sweeper; tractor; counterbalanced forklift; vätgas; Technology Readiness Level; teknisk mognad; arbetsmaskin; hjullastare; pistmaskin; sopmaskin; traktor; motviktstruck;

    Sammanfattning : Förbränning av fossila bränslen är den största orsaken till ökade växthusgasutsläpp i atmosfären som i sin tur ligger till grund för klimatförändringarna. Europeiska Unionen uttrycker klimatförändringarna som ett existentiellt hot och har som mål att Europa ska bli en klimatneutral kontinent till år 2050. LÄS MER