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Ara es mostren els items 94-113 de 120

    • Robust control design to the Furuta system under time delay measurement feedback and exogenous-based perturbation 

      Pujol Vázquez, Gisela; Mobayen, Saleh; Acho Zuppa, Leonardo (Multidisciplinary Digital Publishing Institute (MDPI), 2020-12)
      Article
      Accés obert
      When dealing with real control experimentation, the designer has to take into account several uncertainties, such as: time variation of the system parameters, exogenous perturbation and the presence of time delay in the ...

    • Robust control for variable-speed two-bladed horizontal-axis wind turbines via chattering control 

      Acho Zuppa, Leonardo; Vidal Seguí, Yolanda; Pozo Montero, Francesc (Universidad Nacional de Educación a Distancia (UNED), 2009)
      Comunicació de congrés
      Accés obert
      A robust controller with chattering is proposed for variable speed control of a two-bladed horizontal axis wind turbine similar to the DOE MOD-0 model. The chattering term provides robustness against un-modeled non-linearities. ...

    • Robust control of an electronic throttle system via switched chattering control: benchmark experiments 

      Vidal Seguí, Yolanda; Acho Zuppa, Leonardo; Pozo Montero, Francesc (2009)
      Comunicació de congrés
      Accés obert
      A robust controller with chattering is proposed based on a simplified model of an electronic throttle system. The chattering term provides robustness against un-modeled nonlinearities, e.g., limphome nonlinearity, parameter ...

    • Robust H2 static output feedback to control an autmomotive throttle valve 

      Vargas, Alessandro; Acho Zuppa, Leonardo; Pujol Vázquez, Gisela; Oliveira, Ricardo C.L.F.; do Val, Joao B.R.; Peres, Pedro L.D. (2014)
      Comunicació de congrés
      Accés obert
      The paper presents a control strategy for an automotive electronic throttle body, a device largely used into vehicles to increase the efficiency of the combustion engines. The synthesis of the proposed controller is based ...

    • Robust stability of stochastic systems with varying delays: application to RLC circuit with intermittent closed-loop 

      El Hamdi, Issam; Vargas, Alessandro N.; Hassane Bouzahir, Hassane, Bouzahir; Oliveira, Ricardo C.L.F.; Acho Zuppa, Leonardo (Elsevier, 2021-12-15)
      Article
      Accés obert
      This paper characterizes the robust second-moment stability of stochastic linear systems subject to varying delays. The delays assume a particular form suitable to represent packet loss in networked control systems, under ...

    • Rotary inverted pendulum with magnetically external perturbations as a source of the pendulum’s base navigation commands 

      Pujol Vázquez, Gisela; Acho Zuppa, Leonardo; Mobayen, Saleh; Nápoles Alberro, Amelia; Perez Gracia, Vega (2018-07)
      Article
      Accés obert
      The main objective of this paper is to drive a rotary inverted pendulum by following a desired navigation instruction. This navigation is commanded by the user through a new electromagnetic device which is allowed to perturb ...

    • Second-order LuGre friction model 

      Acho Zuppa, Leonardo; Moreno, Javier; Guerra, Ricardo (ACTA Press, 2005)
      Comunicació de congrés
      Accés obert
      A second-order LuGre friction model is presented which can be viewed as an extension of the well known LuGre friction model. This model is based on a dynamic extension, which can be seen as an extra dynamic to capture ...

    • Semi-active control of base-isolated structures using a new inverse model of MR dampers 

      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 have received special attention as semi-active devices for mitigation of structural vibrations. Because of the inherent nonlinearity of these devices, it is difcult to obtain a reasonable ...

    • Semi-active control of flexible structures using acceleration information via peak-detector systems 

      Pujol Vázquez, Gisela; Acho Zuppa, Leonardo (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents an implementation of a novel semi-active controller that uses only acceleration information, via a magnetorheorological damper, on a flexible structure. This controller was motivated by the scheme of a ...

    • Semi-active magnetic levitation system for education 

      Pujol Vázquez, Gisela; Vargas do Nascimiento, Alessandro; Mobayen, Saleh; Acho Zuppa, Leonardo (Multidisciplinary Digital Publishing Institute, 2021-06)
      Article
      Accés obert
      This paper describes how to construct a low-cost magnetic levitation system (MagLev). The MagLev has been intensively used in engineering education, allowing instructors and students to learn through hands-on experiences ...

    • Set-valued estimation of switching linear system: an application to an automotive throttle valve 

      Podivilova, Elena; Vargas, Alessandro; Shiryaev, Vladimir; Acho Zuppa, Leonardo (2015)
      Article
      Accés obert
      This paper introduces a polyhedral approximation algorithm for set-valued estimation of switching linear systems. The algorithm generates set-valued estimates for any possible sequence of switching parameters, under ...

    • Settling-time improvement in global convergence lagrangian networks 

      Acho Zuppa, Leonardo (2005)
      Comunicació de congrés
      Accés obert
      In this brief, a modification of Lagrangian networks given in (Xia Y., 2003) is presented. This modification improves the settling time of the convergence of Lagrangian networks to a stationary point; which is the optimal ...

    • Stability of Markov jump systems with quadratic terms and its application to RLC circuits 

      Vargas, Alessandro; Pujol Vázquez, Gisela; Acho Zuppa, Leonardo (2016-10-05)
      Article
      Accés obert
      The paper presents results for the second moment stability of continuous-time Markov jump systems with quadratic terms, aiming for engineering applications. Quadratic terms stem from physical constraints in applications, ...

    • Stabilization of two-dimensional nonlinear systems through barrier-function-based integral sliding-mode control: application to a magnetic levitation system 

      Mobayen, Saleh; Vargas do Nascimiento, Alessandro; Acho Zuppa, Leonardo; Pujol Vázquez, Gisela; Caruntu, Constantin (2023-01)
      Article
      Accés obert
      The sliding-mode control (SMC) has been used successfully to stabilize nonlinear systems, yet a side effect of SMC is chattering, an undesired phenomenon. Researchers have then introduced the so called integral-type ...

    • Stochastic stability for a model representing the intake manifold pressure of an automotive engine 

      Nascimiento, Alessandro Vargas do; Acho Zuppa, Leonardo; Bonifacio, Edison; Arens, Walter; do Val, Joao B. R. (2016-09-23)
      Article
      Accés obert
      The paper presents conditions to assure stochastic stability for a nonlinear model. The proposed model is used to represent the input-output dynamics of the angle of aperture of the throttle valve (input) and the manifold ...

    • Super-twisting controllers for wind turbines 

      Tutivén Gálvez, Christian; Vidal Seguí, Yolanda; Acho Zuppa, Leonardo; Rodellar Benedé, José (2016)
      Text en actes de congrés
      Accés obert
      The main contribution of this paper is to propose new control techniques which not only provide fault tolerance capabilities to the WT system, but also improve the overall performance of the system in both fault free and ...

    • Switching stochastic nonlinear systems with application to an automotive throttle 

      Vargas, Alessandro; Costa, Eduardo F.; Acho Zuppa, Leonardo; do Val, Joao B. R. (2017-12-13)
      Article
      Accés restringit per política de l'editorial
      This paper presents results to assure the almost sure stability of switching stochastic nonlinear systems. The switching rule governing the parameters of the system is driven by independent and identically distributed ...

    • Texture analysis for wind turbine fault detection 

      Mujica Delgado, Luis Eduardo; Ruiz Ordóñez, Magda; Acho Zuppa, Leonardo; Alférez Baquero, Edwin Santiago; Tutivén Gálvez, Christian; Vidal Seguí, Yolanda; Rodellar Benedé, José (Curran, 2016)
      Text en actes de congrés
      Accés obert
      The future of wind energy industry passes through the use of larger and more flexible wind turbines in remote locations, which are increasingly offshore to benefit stronger and more uniform wind conditions. Cost of operation ...

    • The use of the dynamic vibration absorber for energy harvesting 

      Acho Zuppa, Leonardo; Awrejcewicz, Jan; Losyeva, Nataliya; Puzyrov, Volodymyr; Savchenko, Nina (2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Vibration energy is abundantly present in many natural and arti cial systems and can be assembled by various mechanisms, mainly using piezoelectric and electromagnetic means. In the present article, the electromechanical system ...

    • Unscented Kalman filters for estimating the position of an automotive electronic throttle valve 

      Vargas, Alessandro; Menegaz, Henrique; Ishihara, Joao; Acho Zuppa, Leonardo (2016)
      Article
      Accés obert
      The paper presents an application of unscented Kalman filters to an automotive electronic throttle device. The motivation of this study is on estimating the position of the throttle device when measurements of position ...