Sökning: "pseudospectral"

Hittade 5 uppsatser innehållade ordet pseudospectral.

  1. 1. Vertical landing flight envelope definition

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Jack Charles Hooper; [2020]
    Nyckelord :trajectory optimization; pseudospectral; optimal control; re-entry; high speed aerodynamics; high angle of attack;

    Sammanfattning : This paper will investigate the development of a landing footprint for a re-entry vehicle. Vehicles can re-enter the atmosphere with a range of orientations, velocities and flight path angles. LÄS MER

  3. 2. Stochastic Optimal Trajectory Generation via Multivariate Polynomial Chaos

    Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Lisa Whittle; [2017]
    Nyckelord :;

    Sammanfattning : This thesis presents a framework that has been developed in order to compute stochastic optimal trajectories. This is achieved by transforming the initial set of stochastic ordinary differential equations into their deterministic equivalent by application of Multivariate Polynomial Chaos. LÄS MER

  4. 3. Implementing a numerical model for investigating topologically driven magnetic reconnection

    Master-uppsats, KTH/Skolan för elektro- och systemteknik (EES)

    Författare :Jean-Mathieu Teissier; [2016]
    Nyckelord :;

    Sammanfattning : Magnetic reconnection is an omnipresent phenomenon in plasma physics, and its understanding is therefore of major importance. Most of the models of magnetic reconnection existing nowadays are two-dimensional in space, or require at least a dependence of the magnetic field on two coordinates instead of all three. LÄS MER

  5. 4. Iterative methods and convergence for the time-delay Lyapunov equation

    Master-uppsats, KTH/Numerisk analys, NA

    Författare :Lena Leitenmaier; [2016]
    Nyckelord :;

    Sammanfattning : The delay Lyapunov equation is a matrix boundary value problem arising in the characterization of many properties of time-delay systems, for example stability analysis. Its numerical treatment is challenging. For the special case of single-delay systems, a new algorithm based on a delay free formulation has recently been proposed. LÄS MER

  7. 5. Numerical methods for solving the time-dependent Schrödinger equation

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen

    Författare :Anders Persson; [2012]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : The main purpose of this thesis is to describe different numerical methods for solving the time-dependent Schr¨odinger equation. We introduce and describe two different basis representations (spectral and pseudospectral). These basis representations are then used in the different methods we take up for discussion. LÄS MER