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http://dx.doi.org/10.5302/J.ICROS.2014.13.1983

Force-To-Rebalance Mode of a Resonator Gyro and Angular Rate Measurement Tests  

Jin, Jaehyun (Division of Aerospace Engineering, Sunchon National University)
Kim, Dongguk (Attitude and Orbit Control Team, SaTReC (Satellite Technology Research Center), KAIST)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.20, no.5, 2014 , pp. 563-569 More about this Journal
Abstract
This article focuses on a hemispherical resonator gyro driven by the Coriolis effect. A hemispherical shell, called a resonator, is maintained in the resonance state by amplitude control and phase locking control. Parametric excitation has been used to control the amplitude. For rate measurement mode or FTR mode, nodal points have been kept to an amplitude of zero. Angular rate measurement has been demonstrated by rotating a resonator. Frequency mismatch between two stiffness principal axes is a major cause of low performance: vibrating pattern drift and reduced control effectiveness. This mismatch has been reduced significantly by the addition of small mass. A negative spring effect, which lowers resonance frequencies, has been verified experimentally.
Keywords
resonator gyro; amplitude control; resonance control; negative spring; frequency mismatch; force to rebalance;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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