Recent Submissions

  • RF Helicon-based Plasma Thruster (IPT): Design, Set-up, and First Ignition 

    Romano, Francesco; Chan, Y. A.; Herdrich, Georg; García-Almiñana, Daniel; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel; García Berenguer, Marina (International Astronautical Federation, 2019)
    Conference report
    Restricted access - publisher's policy
    To extend missions lifetime at very low altitudes, an efficient propulsion system is requiredto compensate for aerodynamic drag. One solution is Atmosphere-Breathing Electric Propulsion (ABEP). It collects atmospheric ...
  • Ground-based experimental facility for orbital aerodynamics research: design, construction and characterisation 

    Oiko, Vitor; Roberts, Peter C.E; Macario Rojas, Alejandro; García-Almiñana, Daniel; García Berenguer, Marina; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (International Astronautical Federation, 2020)
    Conference lecture
    Restricted access - publisher's policy
    In very low Earth orbits (VLEO), below 450 km altitude, the aerodynamic properties of satellites are primarily determined by the flow regime, free molecular flow, and the interaction of atomic oxygen with the surfacesof ...
  • DISCOVERER: Developing Technologies to Enable Commercial Satellite Operations in Very Low Earth Orbit 

    Roberts, Peter C.E; Crisp, Nicholas H.; Edmonson, Steve; García-Almiñana, Daniel; García Berenguer, Marina; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (International Astronautical Federation, 2020)
    Conference lecture
    Restricted access - publisher's policy
    The DISCOVERER project is developing technologies to enable commercially-viablesustained-operation of satellites in very low Earth orbitsfor communications and remote sensing applications. Operatingcloser to the surface ...
  • Investigation of Novel Drag-Reducing and Atomic Oxygen Resistant Materials in Very Low Earth Orbit using SOAR (Satellite for Orbital Aerodynamics Research) 

    Crisp, Nicholas H.; Macario Rojas, Alejandro; Roberts, Peter C.E; García-Almiñana, Daniel; García Berenguer, Marina; Rodríguez Donaire, Silvia; Sureda Anfres, Miquel (International Astronautical Federation, 2020)
    Conference report
    Restricted access - publisher's policy
    Interest in operating spacecraft in very low Earth orbits (VLEO), those below approximately 450 km, is growing due to the numerous benefits offered by reducing altitude. For remote sensing and Earth observation applications, ...
  • Singularity-free computation of quaternions from rotation matrices in E4 and E3 

    Sarabandi, Soheil; Pérez Gracia, Alba; Thomas, Federico (2018)
    Conference report
    Open Access
    A real orthogonal matrix representing a rotation in E4 can be decomposed into the commutative product of a left-isoclinic and a right-isoclinic rotation matrix. The double quaternion representation of rotations in E4 follows ...
  • A fast branch-and-prune algorithm for the position analysis of spherical mechanisms 

    Shabani, Arya; Sarabandi, Soheil; Porta Pleite, Josep Maria; Thomas, Federico (Springer, 2019)
    Conference report
    Open Access
    Different branch-and-prune schemes can be found in the literature for numerically solving the position analysis of spherical mechanisms. For the prune operation, they all rely on the propagation of motion intervals. They ...
  • Evaluation of the effectiveness of control sources’ interval on active noise control performance 

    Sohrabi, Shahin; Pàmies Gómez, Teresa; Romeu Garbí, Jordi (Sociedad Española de Acústica (SEA), 2019)
    Conference report
    Open Access
    Amongst many important factors that affect the performance of active noise barrier, namely, the location of error microphones, and secondary sources, the intervals of adjacent error microphones and secondary sources, etc. ...
  • Fractal evaluation aspects in characterizing the roughness of a driving wheel from a locomotive 

    Babici, Laura Mariana; Tudor, Andrei; Romeu Garbí, Jordi; Stoica, M.
    Conference report
    Open Access
    For comprehending tribological phenomena such as wear, friction, contact deformation and tightness of contact joints is the essential characterisation of the multiple scale topography of roughness surfaces. Wheel roughness ...