Reference : THERMOELASTIC DAMPING IN VIBRATING BEAM ACCELEROMETER: A NEW THERMOELASTIC FINITE ELEMEN...
Diverses speeches and writings : Conference given outside the academic context
Engineering, computing & technology : Mechanical engineering
http://hdl.handle.net/2268/22875
THERMOELASTIC DAMPING IN VIBRATING BEAM ACCELEROMETER: A NEW THERMOELASTIC FINITE ELEMENT APPROACH
English
Lepage, Séverine [Université de Liège - ULG > > LTAS - Vibrations et Identification des Structures > >]
Le Traon, Olivier [ONERA > > > >]
KLapka, Igor [Open-Engineering > > > >]
Masson, S. [ONERA > > > >]
Golinval, Jean-Claude mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
2006
International
CANEUS 2006
du 27 août 2006 au 1 septembre 2006
Toulouse
France
[en] Thermoelastic damping ; MEMS
[en] In order to respond to the demand of accurate miniature inertial navigation systems, ONERA has been working on the design of a vibrating beam accelerometer called the Vibrating Inertial
Accelerometer (VIA). The accuracy of the VIA is directly related to the thermoelastic quality factor of its sensitive element, which is a beam made of quartz. In this work, thermopiezoelectric finite element analyses of the beam are carried out in order to determine the thermoelastic quality factor. These finite element results are compared to the analytical and experimental quality factors. Due to their inherent restrictive assumptions, analytical models overestimate the quality factor while the finite element results are in good agreement with the experimental values. As the finite element model allows to take into account the real geometry of the beam and the piezoelectricity of the material, it allows to quantify more precisely the thermoelastic quality factor.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/22875

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