Now showing items 67-79 of 79

    Parametrització d'una bomba d'engranatges externs i validació en condicions reals 

    Torrent Gelmà, Miquel (Date of defense: 2023-03-31)

    (English) Pumps of positive volumetric displacement (PDVP) drive a volume of fluid from suction to discharge for each revolution of its shaft, called derived capacity, and therefore, in an ideal constant capacity pump the ...

    Passive acoustic method for aircraft localization 

    Martín Román, Sara-Regina (Date of defense: 2013-07-15)

    The present thesis investigates a passive acoustic method to locate maneuvering aircraft. The method is based on the acoustical Doppler effect, as a particular effect of the signals received by a mesh of spatially distributed ...

    Research on fluidic oscillators under incompressible and compressible flow conditions 

    Baghaei, Masoud (Date of defense: 2020-07-24)

    One of the main advantages of fluidic oscillators is that they do not have moving parts, which brings high reliability whenever being used in real applications. To use these devices in real applications, it is necessary ...

    Second life batteries of electric vehicles : analysis of use and management models 

    Rallo Tolós, Héctor (Date of defense: 2021-02-09)

    The mobility of the future undoubtedly involves the electrification of vehicles. The increase in social awareness towards a reduction in CO2 emissions, together with the introduction of new laws regulating them, has finally ...

    Solving the nearest rotation matrix problem in three and four dimensions with applications in robotics 

    Sarabandi, Soheil (Date of defense: 2021-04-27)

    Since the map from quaternions to rotation matrices is a 2-to-1 covering map, this map cannot be smoothly inverted. As a consequence, it is sometimes erroneously assumed that all inversions should necessarily contain ...

    Specific energy consumption of metal cutting with thin abrasive discs 

    Awan, Muhammad Rizwan (Date of defense: 2021-11-02)

    The aim of this research is to provide an in-depth understanding of energy consumption in abrasive disc cutting processes. The specific energy consumed in cutting is measured,analysed, and then characterised in to three ...

    Study and characterisation of surface integrity modification after ultrasonic vibration-assisted ball burnishing 

    Jerez Mesa, Ramón (Date of defense: 2018-03-02)

    This dissertation is an experimental research project into the mechanical effects of the ultrasonic vibration-assisted ball burnishing process on the surface integrity of surfaces machined through ball-end milling. Due to ...

    Study and characterization of mechanical properties of wood-PLA composite (Timberfill) material parts built through fused filament fabrication 

    Zandi, Mohammad Damous (Date of defense: 2020-07-17)

    This research is based upon the additive manufacturing (AM) technology which aims to study the mechanical properties of innovative commercial wood-PLA composite material (Timberfill) and characterize its behavior. Specifically ...

    Study of the beam induced vacuum effects in the cryogenic beam vacuum chamber of the Future Circular Hadron Collider 

    Bellafont Peralta, Ignasi (Date of defense: 2021-01-25)

    The Future Circular Hadron Collider (FCC-hh) is a proposal for a 100 km long hadron collider conceived as the successor of the Large Hadron Collider (LHC). The FCC-hh is designed to reach 50 TeV of beam energy, greatly ...

    Study of the characterization of the mechanical properties of materials with elastomeric behavior for biomedical applications 

    Adrover Monserrat, Bàrbara (Date of defense: 2023-02-24)

    (English) The mechanical characterization of new materials used in the Material Extrusion technique (MEX) in 3D printing is essential. The use of this technique is growing and with it the possible applications of printed ...

    Tool-part tribological interaction assessment for continuous deformation processes 

    Torres Chamorro, Lisbeth Alejandra (Date of defense: 2023-07-03)

    (English This dissertation is an experimental assessment of the tool-part tribological interaction of continuous deformation processes: ball burnishing as a superfinishing process and wire drawing as a bulk deformation ...

    Ús de l'oli vegetal cru com a biocarburant per autoconsum agrícola: avaluacio de la sostenibilitat del sistema a Catalunya 

    Baquero Armans, Grau (Date of defense: 2011-07-06)

    La introducció de la colza en la rotació de conreus i la producció i ús d’oli vegetal cru (OVC) com a biocarburant per autoconsum agrícola presenten alguns avantatges respecte al sistema tradicional de conreu de la ...

    Viabilitat tècnica i ambiental de biocombustibles: oli de colza i estella forestal 

    Esteban Dalmau, Bernat (Date of defense: 2011-07-06)

    La dependència actual dels combustibles fòssils en la majoria de sectors industrials i domèstics no és sostenible ni a curt ni a llarg termini. Això està obligant a plantejar alternatives a la majoria de sectors industrials ...