Enviaments recents

  • Use of wiris quizzes in an online calculus course 

    Calm, Remei; Masià, Ramon; Olivé, Carme; Parés Mariné, Núria; Pozo Montero, Francesc; Ripoll, Jordi; Sancho Vinuesa, Teresa (Omnia Publisher SL (OmniaScience), 2017)
    Article
    Accés obert
    Calculus courses often present a large number of difficulties to undergraduate students of scientific studies, especially in engineering degrees. These difficulties are sometimes related to teaching and assessment strategies. ...
  • Wind turbine synchronous reset pitch control 

    Vidal Seguí, Yolanda; Acho Zuppa, Leonardo; Cifre Font, Ignasi; Garcia Manzanera, Àlex; Pozo Montero, Francesc; Rodellar Benedé, José (2017-06-01)
    Article
    Accés obert
    Reset controllers are commonly used to smooth the transient response of systems. We use this technique to improve a standard baseline pitch controller for offshore wind turbines (WTs). The introduction of this strategy ...
  • Distributed piezoelectric sensor system for damage identification in structures subjected to temperature changes 

    Vitola Oyaga, Jaime; Pozo Montero, Francesc; Tibaduiza Burgos, Diego Alexander; Anaya Vejar, Maribel (2017-05-31)
    Article
    Accés obert
    Structural health monitoring (SHM) is a very important area in a wide spectrum of fields and engineering applications. With an SHM system, it is possible to reduce the number of non-necessary inspection tasks, the associated ...
  • Characterization of a class of differential equations 

    Fuad Mohammad Naser, Mohammad; Bdair, Omar M; Ikhouane, Fayçal (2017-01-01)
    Article
    Accés obert
    This paper deals with a characterization of nonlinear systems of the form x<sub>¿</sub> (t) = f (x<sub>¿</sub>(t), u(t/¿)) when the parameter ¿ ¿ 8. In particular, we are interested in the uniform convergence of the sequence ...
  • System identification of a class of Wiener systems with hysteretic nonlinearities 

    radouane, Abdelhadi; Giri, Fouad; Ikhouane, Fayçal; Ahmed-Ali, Tarek; Chaoui, Fatima Zahra; Brouri, Adil (2017-03-01)
    Article
    Accés restringit per política de l'editorial
    Existing works on Wiener system identification have essentially been focused on the case where the output nonlinearity is memoryless. When memory nonlinearities have been considered, the focus has been restricted to backlash ...
  • Detection and classification of structural changes using artificial immune systems and fuzzy clustering 

    Anaya, Maribel; Tibaduiza Burgos, Diego Alexander; Pozo Montero, Francesc (2017-01-01)
    Article
    Accés restringit per política de l'editorial
    Among all the elements that are integrated into a structural health monitoring (SHM) system, methods or strategies for damage detection and classification are nowadays playing a key role in enhancing the operational ...
  • Temperature robust PCA based stress monitoring approach 

    Quiroga, Jabid; Quiroga, John; Mujica Delgado, Luis Eduardo; Villamizar Mejía, Rodolfo; Ruiz Ordóñez, Magda (2016-09-30)
    Article
    Accés obert
    In this paper, a guided wave temperature robust PCA-based stress monitoring methodology is proposed. It is based on the analysis of the longitudinal guided wave propagating along the path under stress. Slight changes in ...
  • Flow estimation in a steel pipe using guided waves 

    Quiroga, John; Quiroga, Jabid; Mujica Delgado, Luis Eduardo; Villamizar Mejía, Rodolfo; Ruiz Ordóñez, Magda (2016-09-30)
    Article
    Accés obert
    In this investigation, a flow rate estimation guided wave based scheme in pipes is proposed. The effect of the fluid over the propagation of longitudinal waves has been experimentally studied by using several laminar ...
  • A velocity based active vibration control of hysteretic systems 

    Pujol Vázquez, Gisela; Acho Zuppa, Leonardo; Pozo Montero, Francesc; Rodriguez, Arturo; Vidal Seguí, Yolanda (2011-01)
    Article
    Accés obert
    Hysteresis is a property of systems that do not instantly follow the forces applied to them, but react slowly, or do not return completely to their original state. A velocity based active vibration control, along with a ...
  • Integrated design of hybrid interstory-interbuilding multi-actuation schemes for vibration control of adjacent buildings under seismic excitations 

    Palacios Quiñonero, Francisco; Rubió Massegú, Josep; Rossell Garriga, Josep Maria; Karimi, Hamid Reza (Multidisciplinary Digital Publishing Institute, 2017-03-25)
    Article
    Accés obert
    The design of vibration control systems for the seismic protection of closely adjacent buildings is a complex and challenging problem. In this paper, we consider distributed multi-actuation schemes that combine interbuilding ...

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