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    A Xylophone Bar Magnetometer for micro/pico satellites

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    Authors
    Lamy, H.
    Rochus, V.
    Niyonzima, I.
    Rochus, P.
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    Discipline
    Physical sciences
    Subject
    Analytical calculation
    Bulk- micromachining
    Current flowing
    External magnetic field
    Fundamental frequencies
    Microelectromechanical-systems technologies
    Miniature version
    Resonant mode
    Silicon-on-insulators
    Sinusoidal currents
    Vertical component
    Working principles
    Finite element method
    Lorentz force
    Magnetic field effects
    Magnetic materials
    Magnetometers
    MEMS
    Microelectromechanical devices
    Micromachining
    Space applications
    Composite micromechanics
    Audience
    Scientific
    Date
    2009
    Metadata
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    Description
    The Belgian Institute of Space Aeronomy (BIRA-IASB), "Centre Spatial de Liège" (CSL), "Laboratoire de Techniques Aéronautiques et Spatiales" (LTAS) of University of Liège, and the Microwave Laboratory of University of Louvain-La-Neuve (UCL) are collaborating in order to develop a miniature version of a xylophone bar magnetometer (XBM) using Microelectromechanical Systems (MEMS) technology. The device is based on a classical resonating xylophone bar. A sinusoidal current is supplied to the bar oscillating at the fundamental transverse resonant mode of the bar. When an external magnetic field is present, the resulting Lorentz force causes the bar to vibrate at its fundamental frequency with an amplitude directly proportional to the vertical component of the ambient magnetic field. In this paper we illustrate the working principles of the XBM and the challenges to reach the required sensitivity in space applications (measuring magnetic fields with an accuracy of approximately of 0.1 nT). The optimal dimensions of the MEMS XBM are discussed as well as the constraints on the current flowing through the bar. Analytical calculations as well as simulations with finite element methods have been used. Prototypes have been built in the Microwave Laboratory using Silicon on Insulator (SOI) and bulk micromachining processes. Several methods to accurately measure the displacement of the bar are proposed.
    Citation
    Lamy, H.; Rochus, V.; Niyonzima, I.; Rochus, P. (2009). A Xylophone Bar Magnetometer for micro/pico satellites. , 60th International Astronautical Congress (IAC), 12-16 October 2009, Daejeon, Republic of South Korea, Vol. 7, 5853-5864,
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/3241
    scopus: 2-s2.0-77953568329
    Type
    Conference
    Peer-Review
    No
    Language
    eng
    Links
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