Now showing items 1-20 of 25

    • An approach to some classical libration point orbit problems by means of artificial intelligence tecniques 

      Abecia Hernanz, Sara Cecilia (Universitat Politècnica de Catalunya, 2021-11-29)
      Master thesis
      Open Access
      Rapid developments in the last decade have demonstrated the potential of new techniques within the Artificial Intelligence (AI) field as an effective approach for different classical problems in the area of astrodynamics. ...
    • Application of dynamical system methods to galactic dynamics : from warps to double bars 

      Sánchez Martín, Patricia (Universitat Politècnica de Catalunya, 2015-06-29)
      Doctoral thesis
      Open Access
      Most galaxies have a warped shape when they are seen from an edge-on point of view. In this work we apply dynamical system methods to find an explanation of this phenomenon that agrees with its abundance among galaxies, ...
    • Astrophysical parameter determination using chaotic orbital regions 

      Nicolás Álvarez, Jorge (Universitat Politècnica de Catalunya, 2018-02-27)
      Master thesis
      Open Access
      Covenantee:   European Space Research and Technology Centre
      The goal of this thesis is to show that chaotic orbits of a dynamical system are advantageous (compared with regularnes) to determine the characteristic parameters of the system, and to give an estimate about the behaviour ...
    • Commodity valoration and its derivatives 

      Martinell Chicano, Bru (Universitat Politècnica de Catalunya, 2016-01)
      Bachelor thesis
      Open Access
      En aquest treball s'introdueix i s'estudien els principals models sobre accions i matèries primeres (commodities) a través d'equacions diferencials estocàstiques. A partir d'aquí, s'estudia el preu dels derivats més senzills ...
    • Computation of libration point orbits and manifolds using collocation methods 

      Rogov, Kirill (Universitat Politècnica de Catalunya, 2016-07-13)
      Master thesis
      Open Access
      This thesis contains a methodology whose aim is to compute trajectories describing natural motion of the phase space in a neighborhood of Libtation points and stable/unstable manifolds which correspond to these orbits in ...
    • Contributions to Libration Orbit Mission Design using Hyperbolic Invariant Manifolds 

      Canalias Vila, Elisabet (Universitat Politècnica de Catalunya, 2007-07-24)
      Doctoral thesis
      Open Access
      Aquesta tesi doctoral està emmarcada en el camp de l'astrodinàmica. Presenta solucions a problemes identificats en el disseny de missions que utilitzen òrbites entorn dels punts de libració, fent servir la teoria de sistemes ...
    • Development of Models for the Equations of Motion in the Solar System: Implementations and Applications 

      Attri, Anshuk (Universitat Politècnica de Catalunya, 2014-07-22)
      Master thesis
      Open Access
      The purpose of this MS-Thesis is to develop suitable semi-analytical quasiperiodic models for the equations of motion in the solar system, in the sense that the models obtained are quasiperiodic pertubations of the restricted ...
    • Dynamics and control for continuous low-thrust spacecraft near collinear libration points 

      Gao, Chen (Universitat Politècnica de Catalunya, 2022-05-18)
      Doctoral thesis
      Open Access
      Covenantee:   Xīběi Gōngyè Dàxué
      Due to the rich dynamic properties of the equilibria of the Restricted Three Body Problem (RTBP), the libration point orbits (LPOs) around them are ideal locations for scientific missions. Fortunately, these invariant ...
    • Generació d'escenaris en finances quantitatives 

      Llena Conesa, Lara (Universitat Politècnica de Catalunya, 2015-07)
      Bachelor thesis
      Restricted access - author's decision
      En aquest treball es tracta la generació d'escenaris dins de l'àmbit financer. S'utilitza aquesta tècnica amb dos objectius diferents: valoració de productes i optimització de carteres. En la primera part s'estudia com es ...
    • Haar Wavelets-Based Methods for Credit Risk Portfolio Modeling 

      Ortiz Gracia, Luis (Universitat Politècnica de Catalunya, 2011-11-24)
      Doctoral thesis
      Open Access
      In this dissertation we have investigated the credit risk measurement of a credit portfolio by means of the wavelets theory. Banks became subject to regulatory capital requirements under Basel Accords and also to the ...
    • Hierarchical risk parity: portfolio optimization 

      Mercader Pérez, Mikel (Universitat Politècnica de Catalunya, 2021-05-25)
      Bachelor thesis
      Open Access
      Aquest treball analitza si el algoritme Hierarchical Risk Parity, un nou mètode d'optimització de carteres, podria funcionar millor que models convencionals en determinats aspectes. En una sèrie de 3 tests fets amb un ...
    • In-plane station keeping based on a shift of line of apsides strategy 

      Viñas Tió, Meritxell (Universitat Politècnica de Catalunya, 2006-02-27)
      Master thesis (pre-Bologna period)
      Open Access
      In the last years, the design of the new spatial missions in several study fields require of higher and more demanding levels of flexibility, autonomy, accuracy and resolution. The achievement of these values implies the ...
    • Initial orbit determination and satellite tracking using optical observations 

      Aizcorbe Rodriguez, Carlos (Universitat Politècnica de Catalunya, 2021-07-15)
      Master thesis
      Restricted access - author's decision
      Covenantee:   Xīběi Gōngyè Dàxué
      The objective of this project is to propose a passive method for orbit determination (OD) of GEO objects using observational data as position measurements. The proposed method use position measurements expressed as right ...
    • Mission and Thermal Analysis of UPC Cubesat 

      Sintes Arroyo, Pol (Universitat Politècnica de Catalunya, 2009-12-22)
      Master thesis
      Open Access
    • Novel consensus strategies applied to spacecraft formation flight 

      Paita, Fabrizio (Universitat Politècnica de Catalunya, 2017-09-04)
      Doctoral thesis
      Open Access
      In this thesis we consider the problem of developing distributed control strategies for spacecraft formation flying. In light of possible interferometric applications, the study is conducted in two different contexts: ...
    • Obtaining gravitational models from planetary ephemeris 

      Sánchez Martín, Patricia (Universitat Politècnica de Catalunya, 2012-03)
      Master thesis
      Open Access
      Ephemerides describe the position and velocity of a celestial object as a function of time. The ephemerides data are obtained by solving the fundamental equations of motion of the body, which is obtained by applying the ...
    • Precessing models and eventual links with galaxy warps 

      Barajas Pichardo, Daniel (Universitat Politècnica de Catalunya, 2010-11)
      Master thesis
      Open Access
      The Restricted Three Body problem is a basic model in celestial mechanics and it has been extensively used in the design of some spatial missions. Sometimes, the designers of these missions consider other similar models ...
    • Proximity maneuvering of libration point orbit formations using adapted finite element methods 

      García Taberner, Laura (Universitat Politècnica de Catalunya, 2010-02-04)
      Doctoral thesis
      Open Access
      This doctoral dissertation is structured in four chapters as follows. The first chapter contains a summary of formation flying projects that have been taken into consideration since few years ago. We specially focus on the ...
    • Spacecraft state propagation and orbit determination using jet transport 

      Chen, Jianlin (Universitat Politècnica de Catalunya, 2021-04-23)
      Doctoral thesis
      Open Access
      The motion of space objects is strongly nonlinear and non-integrable since it is not only affected by the Keplerian central gravity of the Earth, but also subjected to some complex perturbations. Either an accurate and ...
    • Stochastic optimization applied to financial portfolio management 

      Celma Cercadillo, Ramon (Universitat Politècnica de Catalunya, 2015-10)
      Bachelor thesis
      Open Access
      This project covers the basics of Financial Portfolio Management theory through different stochastic optimization models. The concepts of uncertainty and stochastic models are introduced and proven to be more reliable than ...