Optics: measuring and testing – By light interference – Rotation rate
Reexamination Certificate
2007-04-13
2009-06-16
Lyons, Michael A (Department: 2877)
Optics: measuring and testing
By light interference
Rotation rate
C073S504010
Reexamination Certificate
active
07548318
ABSTRACT:
Dithering mechanism and method for eliminating the effects of zero-rate bias in a rate sensor or gyroscope. Both continuously moving and indexing embodiments are disclosed. The mechanism includes a first part mounted in a fixed position centered about a dither axis perpendicular to the input axis of the gyroscope, a second part disposed coaxially of the first part and affixed to the sensing element of the gyroscope, and a plurality of piezoelectrically driven quartz flexure beams extending radially between the first and second parts for dithering the second part about the dither axis. In some embodiments, the dithering mechanism is formed separately from and affixed to the sensing element of the gyroscope, and in others it is formed integrally with the sensing element. In the indexing embodiments, radial arms and fixed stops limit movement of the mechanism between two fixed positions, and drive signals and holding potentials are applied alternately to dither the mechanism between the two positions and to hold it alternately in those positions during successive data acquisition periods.
REFERENCES:
patent: 4115004 (1978-09-01), Hutchings et al.
patent: 4349183 (1982-09-01), Wirt et al.
patent: 4445779 (1984-05-01), Johnson
patent: 4779985 (1988-10-01), Wirt
patent: 4981359 (1991-01-01), Tazartes et al.
patent: 5044749 (1991-09-01), Califano
patent: 5329355 (1994-07-01), Killpatrick
patent: 7066004 (2006-06-01), Kohler
patent: 2006/0196269 (2006-09-01), Jaffe
patent: 0348087 (1989-12-01), None
patent: 0411824 (1991-02-01), None
patent: 94/14076 (1994-06-01), None
Fargas-Marques, A. et al, “On Electrostatic Actuation Beyond Snapping Condition”, Oct. 30-Nov. 3, 2005, pp. 600-603, IEEE.
Aston Salisbury Edward Henry
August Richard John
Jaffe Randall
Tchertkov Igor Leonidovich
Custom Sensors & Technologies, Inc.
Lyons Michael A
Wright Edward S.
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