System for Development of High Quality Factors Gyros
Abstract
System for Development of High Quality Factor Gyros Professor Robert M’Closkey, Principal Investigator Mechanical and Aerospace Engineering University of California, Los Angeles 90095-1597 rtm@seas.ucla.edu Agency and Program Manager: ONR Code 30 Fires Dan Simons, Program Manager Abstract The equipment requested in this proposal will create new capability for developing very high quality factor planar axisymmetric resonators that form the heart of high performance coriolis vibratory gyros. Current planar axisymmetric MEM resonators have achieved impressive ARW and minimum zero rate bias instability figures, however, turn-on to turn-on rate bias values and long-term drift are still barriers to adopting these technologies where long-term stability are system requirements. Greater environmental control, and sophisticated signal processing and calibration techniques can provide marginal performance gains, however, the greatest benefits will be derived from improvements in the resonator itself. Resonators with longer time constants will benefit from an overall reduction in the zero rate bias and quadrature signals and lead to more stable bias signals. In order to achieve longer time constants, the mindset in the community appears to be aimed at shrinking the hemispherical resonator gyro. As a consequence, small three-dimensional hemispherical or hemitoroidal resonators are being vigorously pursued by a number of research groups. These research efforts have spurred the development new fabrication techniques, and impressive time constants have been reported in some cases, however, a major challenge to overcome is the transduction of the resonator signals and integration of the resonator into a package, both of which are complicated by the curvilinear resonator structure. Planar axisymmetric resonator designs which are similar to proven high-performance silicon gyros like the DRG, have not been addressed by these programs yet can achieve long time constants and have the advantage of being much easier to fabricate, transduce and integrate into a package due to their two-dimensional structure. The requested equipment will be used to create and optimize the dynamics of small, high quality factor, planar resonators using traditional low-cost fabrication techniques. The equipment will extend the fabrication, test and measurement capability of the PI’s DoDsupported vibratory gyro research program. The requested items are an ultrasonic machining system for fabricating resonators from low loss materials like fused quartz and Zerodur, a precision 3-axis micro machining platform, a wire bonder, a plasma asher, and an annealing furnace.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N000141512896
Entities
People
- Robert T. M Closkey
Organizations
- Office of Naval Research
- United States Navy
- University of California, Los Angeles