Method and system for calibrating an IG/GP navigational system
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United States of America Patent
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Sep 16, 2003
Grant Date -
Nov 14, 2002
app pub date -
Sep 28, 2001
filing date -
May 11, 2001
priority date (Note) -
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Abstract
A method of calibrating acceleration data signals from a set of accelerometers, and angular rate data signals from a set of gyroscopes within a combined GPS/IGS includes generating navigation data as a function of the acceleration data signals, the angular rate data signals, and prior navigation data. The method further includes combining the navigation data with GPS data via a Kalman filter, so as to produce corrected navigation data, navigation correction data, acceleration correction data and angular rate correction data. The method further includes modifying the acceleration data signals as a function of the acceleration correction data so as to calibrate the acceleration data signals, and modifying the angular rate data signals as a function of the angular rate correction data, so as to calibrate the angular data signals.
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