Twin axis gyroscope
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United States of America Patent
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Jun 11, 2002
Issued Date -
N/A
app pub date -
Oct 13, 1999
filing date -
Mar 14, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A two axis gyroscope has a substantially planar vibratory resonator having a substantially ring or hoop-like shape structure, carrier mode drive means for causing the resonator to vibrate in a Cosn.theta. out-of-plane carrier mode, where n has an integer value of 2 or more, support means for flexibly supporting the resonator, carrier mode pick-off means for sensing out-of-plane movement of the resonator, X axis response mode pick-off means for sensing in-plane Cosn.sub.1.theta. response mode movement of the resonator in response to rotation of the gyroscope about the X axis, where n.sub.1 has a value of n+1 or n-1, and Y axis response mode pick-off means for sensing in-plane Sinn.sub.1.theta. response mode movement of the resonator in response to rotation of the gyroscope about the Y axis where n.sub.1 has a value of n+1 or n-1, identical to that for the X axis response mode.
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