Vibratory ring structure
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United States of America Patent
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Jun 13, 2017
Grant Date -
Apr 16, 2015
app pub date -
Mar 6, 2013
filing date -
Mar 13, 2012
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Abstract
A method of tuning a vibratory ring structure includes determining an angular spacing for a pair of fine tuning holes of substantially the same size, located on or near the neutral axis of the vibratory ring structure, the angular offset being selected to reduce to an acceptable level the frequency split between the target normal mode and a further normal mode which is angularly offset relative to the target normal mode, and forming the pair of fine tuning holes in the vibratory ring structure at the determined angular spacing. A ring structure, for example, a gyroscope, tuned or balanced in this manner, is also disclosed.
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