Avancerad sökning

Hittade 5 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Validation of An Iteration Free Material Model for Paperboard (NEO)

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Hållfasthetslära; Lunds universitet/Institutionen för byggvetenskaper

    Författare :Samuel Thomas Staines; [2022]
    Nyckelord :Paperboard; orthotropic; Constitutive equilibrium free; Non-linear; Curve fit constitutive relation; switch-wise history dependence; total formulation; explicit constitutive relation; In-plane; Elastic-plastic; Technology and Engineering;

    Sammanfattning : The NEO model, developed by Lindström (2019) for paperboard, is a non-linear material model that utilizes empirically based constitutive relations with switches to mimic elastic-plastic responses. Due to the explicit definition of the constitutive relations, the NEO model does not require a constitutive equilibrium loop. LÄS MER

  3. 2. Non-linear Curve Fitting

    Magister-uppsats, Mälardalens högskola/Akademin för utbildning, kultur och kommunikation

    Författare :Farhad Morad; [2019]
    Nyckelord :Curve Fitting; Power-exponential function; Gauss-Newton algorithm; Levenberg-Marquardt algorithm; Linear and non-linear curve fitting; Kurvanpassning; Potens-exponential funktion; Gauss-Newton-algoritm; Levenberg-Marquardt-algoritm; Linjär och ickelinjär kurvanpassning;

    Sammanfattning : The work done in this thesis is to examine various methods for curve fitting. Linear least squares and non-linear least squares will be described and compared, and the Newton method, Gauss--Newton method and Levenberg--Marquardt method will be applied to example problems. .. LÄS MER

  4. 3. Path planning for autonomous vehicles using clothoid based smoothing of A* generated paths and optimal control

    Master-uppsats, KTH/Numerisk analys, NA

    Författare :Marcus Lundberg; [2017]
    Nyckelord :;

    Sammanfattning : Autonomous vehicles is a rapidly expanding field and the need for robust and efficient path planners is high. We approach the global path- planning problem for an autonomous load carrier for quarry environments, developed at Volvo Construction Equipment, using two methods: a two- step path planning and path smoothing approach, and a method based on an optimal control formulation of the path planning problem. LÄS MER

  5. 4. FE-analys av luftinlopp samt karaktärisering av EPDM-gummi

    Master-uppsats, Lunds universitet/Hållfasthetslära

    Författare :Linda Johannesson; [2015]
    Nyckelord :icke-linjär; materialstyvhet; styvhet; lasthistorik; temperatur; töjningshastighet; töjningsamplitud; töjning; linjär-elastisk; linjärelastisk; hyperelastisk; kurvanpassning; EPDM-gummi; luftinlopp; turbokrök; gummibälg; lastbil; gummi med fyllmedel; linjär analys; deformation; non-linear; stiffness; loading history; temperature; strain rate; strain amplitude; strain; hose; turbo; Catia GAS; Catia; Abaqus; FEM; FE-analysis; FE-simulations; linear elastic; hyperelastic; curve fitting; truck; Scania; EPDM; filled rubber; linear analysis; Technology and Engineering;

    Sammanfattning : The aim of this study was to examine if simplified linear analysis can be used to capture the complex and non-elastic behaviour that filled rubber exhibits. Linear analysis includes both linear elastic material models and a linear solving technique. LÄS MER

  7. 5. 3D imaging using time-correlated single photon counting

    Uppsats för yrkesexamina på avancerad nivå, Signaler och System

    Författare :Thomas Neimert-Andersson; [2010]
    Nyckelord :Laser radar; LADAR; time-of-flight; signal processing; non-linear least squares; esprit; time-correlated single photon counting; three-dimensional imaging; range profiling; deconvolution; wiener filter; richardson-lucy algorithm; image processing; watershed;

    Sammanfattning : This project investigates a laser radar system. The system is based on the principles of time-correlated single photon counting, and by measuring the times-of-flight of reflected photons it can find range profiles and perform three-dimensional imaging of scenes. LÄS MER