MEMS Gyro Drift Compensation Using Multiple Rate Measurements Derived from a Single Resonator

Title:	MEMS Gyro Drift Compensation Using Multiple Rate Measurements Derived from a Single Resonator
Author(s):	Howard H. Ge, Amir H. Behbahani, Robert T. M'Closkey
Published in:	Proceedings of IEEE/ION PLANS 2018 April 23 - 26, 2018 Hyatt Regency Hotel Monterey, CA
Pages:	288 - 293
Cite this article:	Ge, Howard H., Behbahani, Amir H., M'Closkey, Robert T., "MEMS Gyro Drift Compensation Using Multiple Rate Measurements Derived from a Single Resonator," Proceedings of IEEE/ION PLANS 2018, Monterey, CA, April 2018, pp. 288-293.
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Abstract:	Axisymmetric resonators possess multiple pairs of nominally degenerate modes, each of which can be configured as a Corilois vibratory gyro. In this paper we report a technique to extract simultaneous angular rate measurements from the same resonator. Specifically, both of the n = 2 and n = 3 pairs of modes in a disk resonator are configured to yield measurements of angular rate. Although the short-term noise is uncorrelated between these rate measurements, the long-term drifts show very strong correlation. A technique is implemented to fuse the two measurements into a single estimate of rate with much lower drift thereby providing a technique for in-situ bias drift compensation.

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