High resolution gyro system for precise angular measurement

Details High resolution gyro system for precise angular measurement High resolution gyro system for precise angular measurement

1993-09-23

1995-04-25

Cuchlinski, Jr., William A.

Geometrical instruments

Indicator of direction of force traversing natural media

Gyroscopically controlled or stabilized

33316, G01C 1900

Patent

active

054087511

ABSTRACT:
The system includes for planar angular measurements a gyro--preferably a laser gyro--and an angle encoder mounted with their sensitive axes coaxially on a turntable shaft, which is rotatably mounted in a case and driven at constant speed with respect to said case. The angular rate should be high enough to operate the laser gyro above the lock-in rate. For spatial angular measurements and navigation three gyros are mounted with their sensitive axes spatially arranged with respect to the turntable shaft to sense the same component of its angular rate. For avaraging errors due to gyro scalefactor and drift, the turntable is mounted on a second shaft with is axis perpendicular to the turntable. The second shaft is provided with a second an coder and a motor rotating the second shaft. The processing of the signal readout of the gyro(s) and encoder(s) allows to increase the accuracy, resolution and bandwidth of angular measurements with respect to a locally fixed basis or to inertial space.

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IEE Journal of Quantum Electronics, vol. QE-23, No. 4, Apr. 87 "A Laser Gyro with Optimized Resonator Geometry" written by R. Rodloff.
German Periodical Technisches Messen tm, 55. Jahrgang, Heft Oct. 1988, pp. 389-396 "Angular measurements with laser gyro", D. Ullrich et al.
German periodical DLR-Nachrichten, 61 Nov. 1990 "Wo liegen die Grenzen des Laserkreisels?" by R. Rodloff.
Buch "Industrielle Winkelmesstechnik" by Prof. Dr.-Ing. Wolfgang Beyer et al., published 1990 by expert verlag, 7044 Ehningen bei Boblingen, Germany-cover sheet and pp. 118 to 121.

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