Methods and systems for minimizing vibration rectification error in magnetic circuit accelerometers
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United States of America Patent
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Apr 19, 2011
Grant Date -
Sep 24, 2009
app pub date -
Mar 18, 2008
filing date -
Mar 18, 2008
priority date (Note) -
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Abstract
Systems and methods for minimizing vibration rectification error in magnetic circuit accelerometers. The systems include an accelerometer with an excitation ring that has a top piece with a lower portion inner diameter and a bottom piece having a diameter smaller than the lower portion inner diameter of the top piece. The accelerometer also includes a proof mass, a magnet mounted to the bottom piece of the excitation ring, a pole piece mounted to the magnet, and a coil attached to the proof mass that extends into a gap between the top piece of the excitation ring and the pole piece. The methods include placing a pole piece in a pole piece to lap surface fixture, placing an excitation ring top piece on an outer portion of the pole piece to lap surface fixture, and placing an excitation ring bottom piece in a lower portion of the excitation ring top piece.
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