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Developing high performance vibratory gyros

Vibratory gyros that achieve sub-degree-per-hour bias instability and low angle random walk typically exploit frequency matching (degeneracy) of a pair of coriolis-coupled modes within the resonant structure. The quintessential embodiment of a degenerate resonator is a thin uniform ring because the modes appear as pairs with matched frequencies. This seminar will review the dynamics of rings and how the modes are used for sensing angular motion, how various noise sources contribute to the spectrum of the measured angular rate and to what degree modal degeneracy is required to achieve the highest signal-to-noise ratio for the angular rate measurement. The seminar will also discuss recent advances in wafer-scale post-fabrication modification of MEM resonators in which “custom” etch recipes are defined for individual resonators thereby yielding degenerate resonators across the wafer.

Type of Seminar:
Control Seminar Series
Prof. Robert M'Closkey
University of California, Los Angeles
May 08, 2017   5.15pm

Contact Person:

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Biographical Sketch:
Robert M’Closkey received his PhD in 1995 from the Department of Mechanical Engineering, California Institute of Technology. He joined the Mechanical and Aerospace Engineering Department at UCLA after a half-year visiting position at UC Berkeley. He received the NSF Career Award and has several teaching awards from UCLA’s School of Engineering.