Examinando por Autor "Maicas, M."

Mostrando 1 - 3 de 3

Acceso Abierto
Application of finite element methods to the analysis of magnetic contamination around electronics in magnetic sensor devices
(Institute of Electrical and Electronics Engineers, 2012-05-23) Díaz Michelena, M.; Belén Fernández, A.; Maicas, M.
The number of missions devoted to the measurement of the magnetic field has dramatically decreased since the 80s, being the decrease in number accompanied by a reduction in the mass and economic budget of many of the exploration missions. This scenario was the seed for a new generation of sensors: the Commercial Off-The-Shelf (COTS) based microsensors. In the particular case of magnetometers, these miniaturized and compact devices imported a traditional problem of geomagnetic missions: the magnetic cleanliness trouble. Magnetic cleanliness, which is isolated in the platform when the magnetometer is deployed in a boom, becomes a real trouble when it has to be considered at Printed Circuit Board (PCB) level. In this work we present the description, method and results of a finite elements model for an engineering prototype of a NANOSAT-01 two axis magnetic sensor, launched in 2004. The idea is to extrapolate this method for all subsystems of a satellite.
Acceso Abierto
Data Base of Extraterrestrial Magnetic Minerals, Test and Magnetic Simulation
(Institute of Electrical and Electronics Engineers, 2013-07-15) Fernández, A. B.; McHenry, M. E.; Díaz Michelena, M.; Aroca, C.; Maicas, M.
The description of the planetary magnetic anomalies is a difficult task that combines either aeromagnetic or in-situ magnetic field measurements, and further laboratory characterization of the local rocks. In the case of extraterrestrial planets this is a very difficult and costly task. With the objective to develop predictive algorithms prior to in-situ measurements, two complimentary lines of work have been undertaken: 1) characterization of magnetic minerals which occur in great abundance in extraterrestrial crusts; and 2) development of finite element method models (FEM) using the properties of these minerals to model possible scenarios and the variation of their magnetic behavior with temperature and temperature gradient swings on the superficial layers of the planets. The ultimate objective is the future comparison between the measurements developed by instruments on board Martian landers and rovers and the developed models.
Acceso Abierto
Single Point Gradiometer for Planetary Applications
(Institute of Electrical and Electronics Engineers, 2015-03-09) Mesa, J. L.; Díaz Michelena, M.; Ciudad, D.; Schoenthal, W.; McHenry, M. E.; Maicas, M.; Aroca, C.; Ministerio de Ciencia e Innovación (MICINN)
We have designed and fabricated a microelectromechanical device, based on the alternating field gradient concept, to measure surface magnetic field gradient on planets. Its sensitivity is 4 10 -4 T/m, which is appropriate for magnetite outcrops and areas with rocks formed at different stages recording geomagnetic field reversals. We present the results obtained with three different prototypes.