Now showing items 1-7 of 7

    • Along-the-path exponential integration for Floquet stability analysis of wind turbines 

      Ros Ganuza, Javier Upna Orcid; Olcoz Alonso, Álvaro; Plaza Puértolas, Aitor Upna Orcid (IOP Publishing, 2022)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Traditionally, stability assessment of wind turbines has been performed by eigenanalysis of the azimuthally-averaged linearized system after applying the Multi-Blade Coordinate (MBC) transformation. However, due to ...
    • Dynamic considerations of heel-strike impact in human gait 

      Ros Ganuza, Javier Upna Orcid; Font-Llagunes, Josep M.; Plaza Puértolas, Aitor Upna Orcid; Kövecses, József (Springer, 2015)   Artículo / Artikulua  OpenAccess
      Based on the impulsive-dynamics formulation, this article presents the analysis of different strategies to regulate the energy dissipation at the heel-strike event in the context of human locomotion. For this purpose, a ...
    • Instantaneous amplitude and phase signal modeling for harmonic removal in wind turbines 

      Zivanovic, Miroslav Upna Orcid; Plaza Puértolas, Aitor Upna Orcid; Iriarte Goñi, Xabier Upna Orcid; Carlosena García, Alfonso Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      We present a novel approach to harmonic disturbance removal in single-channel wind turbine acceleration data by means of time-variant signal modeling. Harmonics are conceived as a set of quasi-stationary sinusoids whose ...
    • Mechanical sensitivity analysis of strain gauge configurations in the main shaft of wind turbines 

      Bacaicoa Díaz, Julen Upna Orcid; Iriarte Goñi, Xabier Upna Orcid; Aginaga García, Jokin Upna Orcid; Plaza Puértolas, Aitor Upna Orcid (IOP Publishing, 2022)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Wind turbines are reaching their remaining useful life, thus it is important to guarantee the well status of its components. A common way to check the status is to measure the loads on the Low Speed Shaft with strain gauges, ...
    • Mode-displacement method for structural dynamic analysis of bio-inspired structures: a palm-tree stem subject to wind effects 

      Plaza Puértolas, Aitor Upna Orcid; Vargas-Silva, G.; Iriarte Goñi, Xabier Upna Orcid; Ros Ganuza, Javier Upna Orcid (Taylor & Francis, 2022)   Artículo / Artikulua  OpenAccess
      Biological materials (orthotropic materials), like wood, can offer good mechanical properties with a minimum amount of material, making their internal structure the suitable one to be applied on bio-inspired structures. ...
    • Modelado simbólico para la simulación en tiempo real de sistemas multicuerpo 

      Plaza Puértolas, Aitor Upna Orcid (2016)   Tesis doctoral / Doktoretza tesia  OpenAccess
      Esta tesis se sitúa dentro del contexto de los métodos simbólicos en la dinámica de sistemas multicuerpo y recoge la experiencia de 25 años en este contexto. La situación anterior a la tesis era la de una librería simbólica ...
    • Ultra-low frequency multidirectional harvester for wind turbines 

      Castellano Aldave, Jesús Carlos; Carlosena García, Alfonso Upna Orcid; Iriarte Goñi, Xabier Upna Orcid; Plaza Puértolas, Aitor Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      In this paper we propose, and demonstrate through a prototype, a completely novel device able to harvest mechanical energy from the multidirectional vibrations in a wind turbine, and convert it into electrical, to power ...