This paper presents the design and performance of an ultra-sensitive position sensor dedicated to future space accelerometers. The electromechanical transducer is based on a capacitive scheme and aims at detecting the motion of a proof-mass in an electrostatic accelerometer. A new design called 'area variation capacitance' is investigated to minimize back-action forces exerted on the proof mass. The resolution of that position sensor is a few tenths of picometer in the 0-1 Hz bandwidth. The position is digitized with a sigma-delta converter to feed the control laws of the accelerometer.


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    Title :

    Capacitive detection scheme for space accelerometers applications


    Contributors:
    Josselin, V. (author) / Touboul, P. (author) / Kielbasa, R. (author)

    Published in:

    Publication date :

    1999


    Size :

    7 Seiten, 14 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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