Exploració per tema "Classificació AMS::70 Mechanics of particles and systems::70G General models, approaches, and methods"

Ara es mostren els items 1-14 de 14

    • A text-mining approach to assess the failure condition of wind turbines using maintenance service history 

      Blanco Martínez, Alejandro; Marti Puig, Pere; Gibert, Karina; Cusidó Roura, Jordi; Sole Casals, Jordi (2019-05-23)
      Article
      Accés obert
      Detecting and determining which systems or subsystems of a wind turbine have more failures is essential to improve their design, which will reduce the costs of generating wind power. Two of the most critical failures, the ...

    • Anisotropic microsphere-based approach to damage in soft fibered tissue 

      Sáez Viñas, Pablo; Alastrué, V.; Pena, Estefania; Doblaré, Manuel; Martínez, Miguel Ángel (2012-05)
      Article
      Accés obert
      An anisotropic damage model for soft fibered tissue is presented in this paper, using a multi-scale scheme and focusing on the directionally dependent behavior of these materials. For this purpose, a micro-structural or, ...

    • Application of the forces' method in dynamic systems 

      Bendito Pérez, Enrique; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Gesto Beiroa, José Manuel (2007-10-11)
      Article
      Accés obert
      We present here some applications of the Forces's method in dynamic systems. In particular, we consider the problem of the approximation of the trajectories of a conservative system of point masses by means of the minimization ...

    • Constrained Lagrangian dissipative contact dynamics 

      de León Rodríguez, Manuel; Lainz Valcázar, Manuel; Muñoz Lecanda, Miguel Carlos; Román Roy, Narciso (2021-12-28)
      Article
      Accés obert
      We show that the contact dynamics obtained from the Herglotz variational principle can be described as a constrained nonholonomic or vakonomic ordinary Lagrangian system depending on a dissipative variable with an adequate ...

    • Constraint algorithm for extremals in optimal control problems 

      Barbero Liñán, María; Muñoz Lecanda, Miguel Carlos (2007-07-27)
      Article
      Accés obert
      A characterization of different kinds of extremals of optimal control problems is given if we take an open control set. A well known constraint algorithm for implicit differential equations is adapted to the study of ...

    • Geometric Hamilton-Jacobi theory for nonholonomic dynamical systems 

      Cariñena, José F.; Gràcia Sabaté, Francesc Xavier; Marmo, Giuseppe; Martínez, Eduardo; Muñoz Lecanda, Miguel Carlos; Román Roy, Narciso (2009-08-14)
      Report de recerca
      Accés obert
      The geometric formulation of Hamilton--Jacobi theory for systems with nonholonomic constraints is developed, following the ideas of the authors in previous papers. The relation between the solutions of the Hamilton--Jacobi ...

    • Higher-order contact mechanics 

      De León, Manuel; Gaset Rifà, Jordi; Lainz Valcázar, Manuel; Muñoz Lecanda, Miguel Carlos; Román Roy, Narciso (Elsevier, 2021-02-01)
      Article
      Accés obert
      We present a complete theory of higher-order autonomous contact mechanics, which allows us to describe higher-order dynamical systems with dissipation. The essential tools for the theory are the extended higher-order tangent ...

    • On some aspects of the geometry of non integrable distributions and applications 

      Muñoz Lecanda, Miguel Carlos (American Institute of Mathematical Sciences, 2018-12-01)
      Article
      Accés obert
      We consider a regular distribution D in a Riemannian manifold (M, g). The LeviCivita connection on (M, g) together with the orthogonal projection allow to endow the space of sections of D with a natural covariant derivative, ...

    • Parameter identification of large-scale magnetorheological dampers in a benchmark building 

      Bahar, Arash; Pozo Montero, Francesc; Acho Zuppa, Leonardo; Rodellar Benedé, José; Barbat Barbat, Horia Alejandro (2009)
      Text en actes de congrés
      Accés obert
      Magnetorheological (MR) dampers are devices that can be use d for vibration re- duction in structures. However, to use these devices in an ef fective way, a precise modeling is required. In this sense, in this paper we ...

    • Safe trajectory of a piece moved by a robot 

      Babb, Thomas; Benedito Benet, Ernest; Bond, Oliver; Kumar, Sandeep; Pacha Andújar, Juan Ramón; Solà-Morales Rubió, Joan de (Springer, 2023-07-12)
      Capítol de llibre
      Accés obert
      In this work, we propose a mathematical model for a physical problem based on the movement of a metal piece held by a robot. Using the principles of Kirchoff plate theory, a set of equations determining stresses and ...

    • Skinner-Rusk unified formalism for optimal control systems and applications 

      Barbero Liñán, María; Echeverría Enríquez, Arturo; Martín de Diego, David; Muñoz Lecanda, Miguel Carlos; Román Roy, Narciso (2007-05-15)
      Article
      Accés obert
      A geometric approach to time-dependent optimal control problems is proposed. This formulation is based on the Skinner and Rusk formalism for Lagrangian and Hamiltonian systems. The corresponding unified formalism developed ...

    • Skinner–Rusk formalism for k-contact systems 

      Gràcia Sabaté, Francesc Xavier; Rivas Guijarro, Xavier; Román Roy, Narciso (2022-02-01)
      Article
      Accés obert
      In previous papers, a geometric framework has been developed to describe non-conservative field theories as a kind of modified Lagrangian and Hamiltonian field theories. This approach is that of k-contact Hamiltonian ...

    • Strict abnormal extremals in nonholonomic and kinematic control systems 

      Barbero Liñán, María; Muñoz Lecanda, Miguel Carlos (2008-06)
      Article
      Accés obert
      In optimal control problems, there exist different kinds of extremals, that is, curves candidates to be solution: abnormal, normal and strictly abnormal. The key point for this classification is how those extremals ...

    • Structural aspects of Hamilton–Jacobi theory 

      Cariñena Marzo, José F.; Gràcia Sabaté, Francesc Xavier; Marmo, Giuseppe; Martínez Fernandez, Eduardo; Muñoz Lecanda, Miguel Carlos; Román Roy, Narciso (2016-02-01)
      Article
      Accés obert
      In our previous papers [11, 13] we showed that the Hamilton–Jacobi problem can be regarded as a way to describe a given dynamics on a phase space manifold in terms of a family of dynamics on a lower-dimensional manifold. ...