Ara es mostren els items 62-81 de 107

    • General dynamics of pulsed digital oscillators 

      Domínguez Pumar, Manuel; Pons Nin, Joan; Ricart Campos, Jordi (IEEE, 2008-02-08)
      Article
      Accés obert
      The objective of this work is to analyze pulsed digital oscillators (PDOs), as dynamical systems. It is proved that under some conditions, the bitstream at the output of the oscillator is that of the sign of a sampled ...
    • Heat flow dynamics in thermal systems described by diffusive representation 

      Domínguez Pumar, Manuel; Atienza García, María Teresa; Kowalski, Lukasz; Novio Vázquez, Santiago; Gorreta Mariné, Sergio; Jiménez Serres, Vicente; Silvestre Bergés, Santiago (Institute of Electrical and Electronics Engineers (IEEE), 2016-09-01)
      Article
      Accés obert
      The objective of this paper is to analyze the dynamics of heat flow in thermal structures working under constant temperature operation. This analysis is made using the tools of sliding mode controllers. The theory is ...
    • Impedance spectroscopy interpretation of silica and polystyrene colloidal suspensions 

      Véliz Noboa, Bremnen Marino; Orpella García, Alberto; Domínguez Pumar, Manuel; Bermejo Broto, Sandra (2020-03-01)
      Article
      Accés obert
      Impedance spectroscopy differences between colloidal 295-nm silica and 300-nm polystyrene nanoparticles in deionized water are analyzed in this work. Using two different two-electrode measurement setups, designed for this ...
    • INSTRUMENTACIO ELECTRONICA 1 (Examen 2n Quadr.) 

      Domínguez Pumar, Manuel (Universitat Politècnica de Catalunya, 2001-06-07)
      Examen
      Accés restringit a la comunitat UPC
    • INSTRUMENTACIO ELECTRONICA 1 (Examen 2n Quadr.) 

      Domínguez Pumar, Manuel (Universitat Politècnica de Catalunya, 2001-06-11)
      Examen
      Accés restringit a la comunitat UPC
    • Light source position microsensor 

      Quero Reboul, Jose Manuel; Guerrero Conejo, Antonio Francisco; Garcia Franquelo, Leopoldo; Domínguez Pumar, Manuel; ameijeiras, iñaki; Castañer Muñoz, Luis María (Institute of Electrical and Electronics Engineers (IEEE), 2001)
      Text en actes de congrés
      Accés obert
      There exist industrial applications where an accurate estimation of a light source position is needed. That is the case for a heliostat, a device that projects sunlight upon a focus hundreds of meters distant. In this paper ...
    • 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 ...
    • Low-cost thermal s-d air flow sensor 

      Domínguez Pumar, Manuel; Masana Nadal, Francisco; Jiménez Serres, Vicente; Bermejo Broto, Sandra; Amírola Sanz, Jorge; Ballester, Javier; Fueyo, Norberto; Castañer Muñoz, Luis María (2002-10)
      Article
      Accés obert
      This paper describes the design and optimization of a hot-wire air flowmeter. A low-cost design of the packaging allows good thermal contact with the airflow, as well as good thermal isolation between the hot and cold ...
    • MEMS technologies for energy harvesting 

      Domínguez Pumar, Manuel; Pons Nin, Joan; Chávez Domínguez, Juan Antonio (Springer, 2016-11-11)
      Capítol de llibre
      Accés obert
      The objective of this chapter is to introduce the technology of Microelectromechanical Systems, MEMS, and their application to emerging energy harvesting devices. The chapter begins with a general introduction to the most ...
    • 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 ...
    • Multiphysics simulation of REMS hot-film anemometer under typical martian atmosphere conditions 

      Kowalski, Lukasz; Castañer Muñoz, Luis María; Domínguez Pumar, Manuel; Jiménez Serres, Vicente (COMSOL, 2010)
      Text en actes de congrés
      Accés obert
      The purpose of this paper is to describe numerical electro-thermal simulations of the REMS wind sensor unit [3] and the results obtained by using COMSOL multiphysics. This device is a hot-film anemometer for 2D wind ...
    • On some properties of the output of a pulsed digital oscillator working with multiple resonances 

      Blokhina, Elena; Feely, Orla; Ricart Campos, Jordi; Domínguez Pumar, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Text en actes de congrés
      Accés obert
      In this paper, we study the possible output of the pulsed digital oscillator (PDO) with multiple resonant modes of the mechanical resonator in the feedback loop. PDOs are simple circuits that allow linear resonators to ...
    • On the boundary layer development and heat transfer from a sphere at moderate Reynolds numbers 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Soria Guerrero, Manel; Gómez, Samuel; Domínguez Pumar, Manuel; Kowalski, Lukasz (2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Direct and large-eddy numerical simulations have been performed for a heated sphere at Reynolds numbers 200, 300, 500, 750, 1000 and 104, in the context of the development of a spherical wind sensor for Mars atmosphere ...
    • On the effects of free-stream turbulence intensity in the fluid flow and heat transfer from a sphere at subcritical Reynolds numbers 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Soria Guerrero, Manel; Gomez, Samuel; Domínguez Pumar, Manuel; Kowalski, Lukasz (2018)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      In this work, the effect of the free-stream turbu-lence on the heat transfer and the near wake behind a sphere is studied at moderate Reynolds numbers of ¿¿ ¿ ¿¿¿¿ and ¿¿ ¿ ¿¿¿. Turbulence delays the sep-aration of the ...
    • Open loop testing for optimizing the closed loop operation of chemical systems 

      Domínguez Pumar, Manuel; Olm Miras, Josep Maria; Kowalski, Lukasz; Jiménez Serres, Vicente (Pergamon Press, 2020-04-06)
      Article
      Accés obert
      One way to optimize the operation of chemical systems consists on using closed loop controls while the system is operated. This way, it is possible to optimize the operating point in the plant, process or chemical system ...
    • P3R-3 design and characterization of air coupled ultrasonic transducers based on MUMPs 

      Martínez Graullera, Óscar Fernando; Martín Arguedas, Carlos Julián; Gómez-Ullate Alvear, Luis; Domínguez Pumar, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2007)
      Text en actes de congrés
      Accés obert
      This paper deals with the design and characterization of several capacitive micromachined ultrasonic transducer (cMUT) cells for the future design of an air-coupled transducer for non destructive testing (NDT). Each design ...
    • 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 

      Domínguez Pumar, Manuel; Ricart Campos, Jordi; Pons Nin, Joan; Rubio, Felix (Institute of Electrical and Electronics Engineers (IEEE), 2008)
      Comunicació de congrés
      Accés obert
      The objective of this paper is to collect the main latest results on pulsed digital oscillators. Rigorous and experimental results are presented that show what kind of sequences are at their output, the relation between ...
    • 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 ...