Sökning: "Euler Lagrange"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden Euler Lagrange.

  1. 1. Calculating scattering amplitudes in φ3 and Yang-mills theory using perturbiner methods

    L3-uppsats, Uppsala universitet/Teoretisk fysik

    Författare :Daniel Nilsson; Magnus Bertilsson; [2022]
    Nyckelord :QFT; Quantum; Quantum field theory; scattering amplitudes; Berends Giele Currents; feynman diagrams; n particle scattering;

    Sammanfattning : We calculate tree-level scattering amplitudes in φ^3 theory and Yang-Mills theory by means of the perturbiner expansion. This involves solving the Euler-Lagrange equations of motion perturbatively via a multi-particle ansatz, and using Berends-Giele recursion relations to extract the solution from simple on-shell data. LÄS MER

  3. 2. The Hanging Rope: A Convex Optimization Problem in the Calculus of Variations

    Master-uppsats, Lunds universitet/Matematik LTH

    Författare :Erik Steen; [2020]
    Nyckelord :Elasticity theory; non-linear materials; calculus of variation; convex analysis; Legendre transform; Mathematics and Statistics;

    Sammanfattning : We study the problem first introduced by Verma and Keller in 1984 of how to taper a heavy rope such that its elongation is minimized. The problem is stated as an optimization problem of a functional J[w]. Specifically we provide a proof of optimality for the solution using traditional convex optimization techniques. LÄS MER

  4. 3. Development and Implementation of a Mass Balancing System for CubeSat Attitude Hardware-in-the-Loop Simulations

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Guillermo Ledo López; [2019]
    Nyckelord :hil; hardware in the loop; simulation; satellite; simulator; platform; simulink; matlab; least squares; aocs; testing; attitude; dynamics; control;

    Sammanfattning : Spacecraft simulator platforms can simulate the microgravity environment of space on Earth, for the purposes of testing the Attitude and Orbit Control Subsystem of satellites. In order to do this, the satellite is mounted on a bench and the combined center of mass of this assembly is controlled by a series of moving masses. LÄS MER

  5. 4. Concise Modeling of Humanoid Dynamics

    Master-uppsats, Högskolan i Halmstad/Akademin för informationsteknologi

    Författare :Florian Joachimbauer; [2017]
    Nyckelord :Passive walking; Humanoid robot; Acumen; Equation-based tool; Euler-Lagrange;

    Sammanfattning : Simulation of mechanical systems like walking robots, is an essential part in developingnew and more applicable solutions in robotics. The increasing complexity of methodsand technologies is a key challenge for common languages. That problem creates a needfor flexible and scalable languages. LÄS MER

  7. 5. Konstruktion av en optimal balk med Tikhonovregularisering

    Kandidat-uppsats, KTH/Numerisk analys, NA

    Författare :Erik Berglund; [2015]
    Nyckelord :;

    Sammanfattning : I detta kandidatexamensarbete studeras ett inverst problem: att för en jämnt fördelad last numeriskt minimera energin som tas upp i en fritt upplagd balk. I detta problem antas balken vara indelad i ett givet antal lika långa stycken med konstant böjstyvhet och minimeringen sker med avseende på dessa styckens böjstyvheter. LÄS MER