Now showing items 1-7 of 7

  • A miniaturized two axis sun sensor for attitude control of nano-satellites 

    Angulo, M.; Gras, Ana; Ortega Villasclaras, Pablo Rafael; López Rodríguez, Gema; Ricart Campos, Jordi; Domínguez Pumar, Manuel; Castañer Muñoz, Luis María; Quero, J.M.; Tarrida, C. L.; Reina, M. (2010-10-10)
    Article
    Open Access
    This paper describes the design, fabrication, characterization, and satellite integration of a miniaturized two axis sun sensor which has been used in the attitude control system of the Spanish nano-satellite NANOSAT-1B. ...
  • A novel Σ-Δ pulsed digital oscillator (PDO) for MEMS 

    Domínguez Pumar, Manuel; Pons Nin, Joan; Ricart Campos, Jordi; Bermejo Pelayo, Agustin; Figueras Costa, Eduardo (IEEE, 2005-12)
    Article
    Open Access
    A novel digital oscillator topology for microelectromechanical systems (MEMS) based on bandpass sigma–delta modulation is presented. Short pulses of force of the same amplitude maintain the oscillation and the associated ...
  • Control of MEMS vibration modes with pulsed digital Oscillators. Part II: simulation and experimental results 

    Domínguez Pumar, Manuel; Ricart Campos, Jordi; Pons Nin, Joan; Blokhina, Elena; Gorreta, Sergi; Hernando, Jorge; Manzaneque, Tomas; Sanchez Rojas, Jose Luis; Feely, Orla (2010-08)
    Article
    Open Access
    This paper extends our previous work on the selective excitation of mechanical vibration modes in MEMS devices using pulsed digital oscillators (PDOs). It begins by presenting extensive simulation results using the set ...
  • Control of MEMS vibration modes with pulsed digital oscillators: part I—theory 

    Blokhina, Elena; Pons Nin, Joan; Ricart Campos, Jordi; Feely, Orla; Domínguez Pumar, Manuel (2010-08)
    Article
    Open Access
    The aim of this paper is to show that it is possible to excite selectively different mechanical resonant modes of a MEMS structure using pulsed digital oscillators (PDOs). This can be done by simply changing the working ...
  • Digital resonance for MEMS 

    Ricart Campos, Jordi; Pons Nin, Joan; Gorreta, Sergi; Domínguez Pumar, Manuel (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-02-11)
    Conference report
    Open Access
    This work shows the application of Pulsed Digital Oscillators to the detection of physical changes in MEMS devices that cause small shifts in their resonance frequencies. Such devices can be used as resonators in several ...
  • General dynamics of pulsed digital oscillators 

    Domínguez Pumar, Manuel; Pons Nin, Joan; Ricart Campos, Jordi (IEEE, 2008-02-08)
    Article
    Open Access
    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 ...
  • Tracking control system using an incident radiation angle microsensor 

    Quero Reboul, José Ma.; Aracil Fernández, Carmen; García Franquelo, Leopoldo; Ricart Campos, Jordi; Ortega Villasclaras, Pablo Rafael; Domínguez Pumar, Manuel; Castañer Muñoz, Luis María; Osuna, Rafael (IEEE, 2007-01-27)
    Article
    Open Access
    For some industrial applications, an accurate estimation of a light source position is needed. That is the case for a heliostat, a device that projects sunlight onto a focus hundreds of meters away from its aiming point. ...