Exploració per autor "Gorreta Mariné, Sergio"

Ara es mostren els items 21-40 de 40

    • Implementació d'oscil.ladors digitals polsats 

      Gorreta Mariné, Sergio (Universitat Politècnica de Catalunya, 2010-07-20)
      Projecte/Treball Final de Carrera
      Accés obert

    • Low pressure spherical thermal anemometer for space missions 

      Kowalski, Lukasz; Jiménez Serres, Vicente; Domínguez Pumar, Manuel; Gorreta Mariné, Sergio; Silvestre Bergés, Santiago; Castañer Muñoz, Luis María (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The novelty of this 2D thermal anemometer is the spherical compact and robust design with improved sensitivity in the range of 600-900Pa of carbon dioxide pressure and 0.25 to 10 m/s wind speed. The small size (11.2mm ...

    • Model identification of time-varying diffusive systems 

      Atienza García, María Teresa; Kowalski, Lukasz; Gorreta Mariné, Sergio; Pons Nin, Joan; Jiménez Serres, Vicente; Domínguez Pumar, Manuel (2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents a characterization method based on diffusive representation for a class of linear or nonlinear time-varying diffusive systems. The system variation with time may come as a result of the own actuation ...

    • Modelling of a charge control method for capacitive MEMS 

      Giounanlis, Panonios; Blokhina, Elena; Feely, Orla; Domínguez Pumar, Manuel; Pons Nin, Joan; Gorreta Mariné, Sergio (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Charging of dielectric materials in microelectromechanical systems (MEMS) actuated electrostatically is a major reliability issue. In our previous work we proposed a feedback loop control method that is implemented as ...

    • Piezo-MUMPS batch #1. First Report. 

      Pons Nin, Joan; Gorreta Mariné, Sergio; Domínguez Pumar, Manuel; Blokhina, Elena; O'Connell, D. (2013-07-12)
      Report de recerca
      Accés restringit per acord de confidencialitat

    • Pulsed digital oscillators for electrostatic MEMS 

      Gorreta Mariné, Sergio; Ruiz Fernández, Daniel; Blokhina, Elena; Pons Nin, Joan; Jiménez Serres, Vicente; O'Connell, D.; Feely, Orla; Madrenas Boadas, Jordi; Domínguez Pumar, Manuel (2012)
      Article
      Accés restringit per política de l'editorial
      This paper introduces a new actuation scheme for implementing Pulsed Digital Oscillators (PDOs) for electrostatic MEMS resonators. In this scheme, the capacitance of the device is biased with a voltage and it is periodically ...

    • Real-time characterization of dielectric charging in contactless capacitive MEMS 

      Domínguez Pumar, Manuel; Gorreta Mariné, Sergio; Pons Nin, Joan; Blokhina, Elena; Giounanlis, Panonios; Feely, Orla (2015-03-01)
      Article
      Accés obert
      This paper presents a new method to characterize the dynamics of the charge trapped in the dielectric layer of contactless microelectromechanical systems. For sampled-time systems, this allows knowing the state of the net ...

    • Second order sigma-delta control of charge trapping for MOS capacitors 

      Bheesayagari, Chenna Reddy; Gorreta Mariné, Sergio; Pons Nin, Joan; Domínguez Pumar, Manuel (2017-09-01)
      Article
      Accés obert
      This paper presents the circuit topology of a second order sigma-delta control of charge trapping for MOS capacitors. With this new topology it is possible to avoid the presence of plateaus that can be found in first-order ...

    • Self-calibrating closed-loop circuit for configurable constant voltage thermal anemometers 

      Gorreta Mariné, Sergio; Barajas Ojeda, Enrique; Kowalski, Lukasz; Atienza García, María Teresa; Domínguez Pumar, Manuel; Jiménez Serres, Vicente (Institution of Electrical Engineers, 2015-09-17)
      Article
      Accés obert
      A new circuit is described which applies a configurable voltage across an RTD while the current flowing through it is measured with a current mirror. The circuit also allows working with voltages above the IC supply voltage ...

    • Sigma-delta effects and charge locking in capacitive MEMS under dielectric charge control 

      Giounanlis, Panagiotis; Gorreta Mariné, Sergio; Domínguez Pumar, Manuel; Pons Nin, Joan; Feely, Orla; Blokhina, Elena (2016-05)
      Article
      Accés obert
      This work investigates, analytically and experimentally, the effects induced by the use of a first-order sigma-delta (S¿) feedback loop as a control method of dielectric charging for capacitive microelectromechanical systems ...

    • Simultaneous control of dielectric charge and device capacitance in electrostatic MEMS 

      Gorreta Mariné, Sergio; Pons Nin, Joan; Domínguez Pumar, Manuel (2015-12)
      Article
      Accés obert
      This letter presents a double closed loop for simultaneously controlling the net dielectric charge and the device capacitance in contactless electrostatic MEMS devices. The first loop controls the net charge trapped in ...

    • Simultaneous control of dielectric charging and device capacitance for contactless electrostatic MEMS 

      Gorreta Mariné, Sergio (Universitat Politècnica de Catalunya, 2016-09-20)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      Simultaneous control of dielectric charging and device capacitance for contactless electrostatic MEMS

    • Sliding mode analysis applied to improve the dynamical response of a spherical 3D wind sensor for Mars atmosphere 

      Atienza García, María Teresa; Kowalski, Lukasz; Gorreta Mariné, Sergio; Jiménez Serres, Vicente; Castañer Muñoz, Luis María; Domínguez Pumar, Manuel (2017-11-01)
      Article
      Accés obert
      The objective of this paper is to show how the structure of a thermal wind anemometer can be tuned to ensure a fast response when the sensor works in closed loop configuration (constant temperature operation). If the thermal ...

    • Sliding mode control of heterogeneous systems 

      Domínguez Pumar, Manuel; Gorreta Mariné, Sergio; Atienza García, María Teresa; Blokhina, Elena; Pons Nin, Joan (2017-06-01)
      Capítol de llibre
      Accés restringit per política de l'editorial
      This paper establishes a link between closed-loop controls for heterogeneous systems and sliding mode controls. We demonstrate that sliding mode analysis matches with experimental results from dielectric charge controllers. ...

    • Sliding-mode analysis of the dynamics of sigma-delta controls of dielectric charging 

      Domínguez Pumar, Manuel; Gorreta Mariné, Sergio; Pons Nin, Joan (Institute of Electrical and Electronics Engineers (IEEE), 2016-03-08)
      Article
      Accés obert
      The purpose of this paper is to show that sigma-delta controllers of dielectric charge can be analyzed using the tools of sliding-mode controllers, in the infinite sampling frequency approximation. This allows to study the ...

    • Spherical wind sensor for the atmosphere of mars 

      Kowalski, Lukasz; Atienza García, María Teresa; Gorreta Mariné, Sergio; Jiménez Serres, Vicente; Domínguez Pumar, Manuel; Silvestre Bergés, Santiago; Castañer Muñoz, Luis María (2016-04-01)
      Article
      Accés obert
      A novel wind speed and direction sensor designed for the atmosphere of Mars is described. It is based on a spherical shell divided into four triangular sectors according to the central projection of tetrahedron onto the ...

    • Testing campaign of a martian spherical wind sensor at the AWTSII Wind Tunnel Facility 

      Kowalski, Lukasz; Gorreta Mariné, Sergio; Atienza García, María Teresa; Jiménez Serres, Vicente; Castañer Muñoz, Luis María; Domínguez Pumar, Manuel (2018)
      Text en actes de congrés
      Accés obert

    • Thermal dynamics modeling of a 3D wind sensor based on hot thin film anemometry 

      Atienza García, María Teresa; Kowalski, Lukasz; Gorreta Mariné, Sergio; Jiménez Serres, Vicente; Domínguez Pumar, Manuel (2018-02-01)
      Article
      Accés obert
      The objective of this paper is to obtain time-varying models of the thermal dynamics of a 3D hot thin film anemometer for Mars atmosphere. To this effect, a proof of concept prototype of the REMS (Rover Environmental ...

    • Time-varying thermal dynamics modeling of the prototype of the REMS wind sensor 

      Atienza García, María Teresa; Kowalski, Lukasz; Gorreta Mariné, Sergio; Jiménez Serres, Vicente; Domínguez Pumar, Manuel (2017)
      Text en actes de congrés
      Accés obert
      The objective of this work is to show the results from the analysis of the thermal dynamics of a prototype of the REMS 3D wind anemometer using the tools of Diffusive Representation (DR). DR is a mathematical tool that ...

    • Understanding complexity in multiphysics systems-on-a-chip: modern approaches for design 

      Blokhina, Elena; O'Connell, D.; Andrade Miceli, Dennis; Gorreta Mariné, Sergio; Pons Nin, Joan; Domínguez Pumar, Manuel; Feely, Orla; Galayko, Dimitri (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The aim of this paper is to formalise the term “complexity” in the context of modern microelectronics, propose the definitions of key terms and discuss a case study. Our aim is to show that the term “complex system” is ...