Ring laser gyroscope enhanced resolution system
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United States of America Patent
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Jan 16, 1996
Grant Date -
N/A
app pub date -
Apr 22, 1991
filing date -
Apr 22, 1991
priority date (Note) -
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Abstract
Disclosed herein is a Ring Laser Gyroscope Enhanced Resolution System comprising, in a preferred embodiment, a sampling frequency modulation phase-locked loop (or 'chirp') which is used in combination with the fast filter. Enhanced resolution is achieved by using the fast filter (preferably a moving average digital filter) to gather optically integrated rate data and accumulate this data. During the data gathering process, the accumulated data is sampled at a rate set by a frequency modulated ('chirper') phase-locked loop in order to remove undesirable data due to aliasing effects upon the digital filter. In this manner, an enhanced resolution of the gyroscope angular measurement is achieved.
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