Measuring and testing – Speed – velocity – or acceleration – Angular rate using gyroscopic or coriolis effect
Patent
1998-04-30
2000-06-27
Moller, Richard A.
Measuring and testing
Speed, velocity, or acceleration
Angular rate using gyroscopic or coriolis effect
7350413, G01C 1900, G01P 900
Patent
active
060792701
ABSTRACT:
The invention is a method and apparatus for generating a plurality of driving signals for a vibratory rotation sensor, the plurality of driving signals resulting in a plurality of readout signals from the vibratory rotation sensor. The method comprises the steps of determining a 2.times. tracking angle rate, transforming the 2.times. tracking angle rate into a trig function rate, transforming the trig function rate into a second trig function, and generating the plurality of driving signals utilizing the second trig function. The 2.times. tracking angle rate, determined from the plurality of readout signals, is the time rate of change of twice the tracking angle, the tracking angle being an angle which tracks the orientation angle of the standing-wave pattern of the vibratory rotation sensor. The trig function rate is the time rate of change of a first trig function, the first trig function being an approximation to a mathematically-exact (M-E) trig function. The M-E trig function is selected from the group consisting of the tangent of twice the tracking angle and the cotangent of twice the tracking angle. The second trig function is also an approximation to the M-E trig function.
REFERENCES:
patent: 5760304 (1998-06-01), Lynch
patent: 5763780 (1998-06-01), Matthews et al.
patent: 5801310 (1998-09-01), Matthews et al.
patent: 5817940 (1998-10-01), Kobayashi et al.
patent: 5827966 (1998-10-01), Lynch et al.
Matthews Anthony
Varty Guy T.
Litton Systems Inc.
Malm Robert E.
Moller Richard A.
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