Axisymmetric microelectromechanical (MEM) vibratory rate gyroscopes are designed so the central post which attaches the resonator to the sensor case is a nodal point of the two Coriolis-coupled modes that are exploited for angular rate sensing. This configuration eliminates any coupling of linear acceleration to these modes. When the gyro resonators are fabricated, however, small mass and stiffness asymmetries cause coupling of these modes to linear acceleration of the sensor case. In a resonator postfabrication step, this coupling can be reduced by altering the mass distribution on the resonator so that its center of mass is stationary while the operational modes vibrate. In this paper, a scale model of the disk resonator gyroscope (DRG) is used to develop and test methods that significantly reduce linear acceleration coupling.

References

References
1.
Lynch
,
D. D.
, 1988, “
Coriolis Vibratory Gyros
,”
Symposium Gyro Technology
,
Stuttgart
,
Germany
.
2.
Lynch
,
D. D.
, 1984,
“Hemispherical Resonator Gyro,”
R. R.
Ragan
, ed., Inertial Technology for the Future, IEEE Transactions on Aerospace Electronic Systems, Vol. AES-20, No. 4, pp.
414
444
.
3.
Kim
,
D. J.
, and
M’Closkey
,
R. T.
, 2006, “
A Systematic Method for Tuning the Dynamics of Electrostatically Actuated Vibratory Gyros
,”
IEEE Trans. Control Syst. Technol.
,
14
(
1
), pp.
69
81
.
4.
Gallacher
,
B. J.
, 2000, “
Multi-Modal Tuning of a Ring Gyroscope Using Laser Ablation
,”
Proc. Inst. Mech. Eng. C.
,
217
, pp.
557
576
.
5.
Rourke
,
A. K.
,
McWilliam
,
S.
, and
Fox
,
C. H. J.
, 2002, “
Multi-Mode Trimming of Imperfect Thin Rings Using Masses at Pre-Selected Locations
,”
J. Sound Vib.
,
256
(
2
), pp.
319
345
.
6.
Fell
,
C. P.
, 1996, “
Method for Matching Vibration Mode Frequencies on a Vibrating Structure
,” U.S. Patent No. 5,739,410.
7.
Schwartz
,
D.
,
Kim
,
D. J.
, and
M’Closkey
,
R. T.
, 2009
“Frequency Tuning of a Disk Resonator Gyro Via Mass Matrix Perturbation,”
ASME J. Dyn. Syst., Meas., Control
,
131
(
6
),
061004
.
8.
Zhbanov
,
Y. K.
, and
Zhuravlev
,
V. F.
, 1998, “
On the Balancing of a Hemispherical Resonator Gyro
,”
Mech. Solids
,
33
(
4
), pp.
2
13
.
9.
Allaei
,
D.
,
Soedel
W.
, and
Yang
,
T. Y.
, 1986,
“Natural Frequencies of Rings That Depart From Perfect Axial Symmetry,”
J. Sound Vib.
,
111
, pp.
9
27
.
10.
Rourke
,
A. K.
,
McWilliam
,
S.
, and
Fox
,
C. H. J.
, 2001, “
Multi-Mode Trimming of Imperfect Rings
,”
J. Sound Vib.
,
248
(
4
), pp.
695
724
.
11.
Schwartz
,
D.
, 2010, “
Mass Perturbation Techniques for Tuning and Decoupling of a Disk Resonator Gyroscope
,” Ph.D. thesis, University of California, Los Angeles, CA.
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