Multi-mode coriolis vibratory gyroscopes having high order rotationally symmetric mechanical structure and 32 electrodes
AssigneeHRL Laboratories, LLC
InventorsLogan D. Sorenson, Hung Nguyen, Raviv Perahia, Lian X. Huang, David T. Chang
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Abstract
An angular sensor, comprising a Coriolis vibratory gyroscope (CVG) resonator, capable of oscillating along a first pair of normal n=1 modes comprising a first normal mode and a second normal mode; and a second pair of normal n=2 modes comprising a third normal mode and a fourth normal mode; the sensor further comprising one drive electrode and one sense electrode aligned along an anti-nodal axis of each mode; and a pair of bias tune electrodes aligned with an anti-nodal axis of each mode if no drive and sense electrode pair is aligned with said anti-nodal axis.
Claims30
An angular sensor, comprising:
- a Coriolis vibratory gyroscope (CVG) resonator, provided for oscillating along:
- a first pair of normal n-=modes comprising a first normal mode and a second normal mode;
- each of the first and second normal modes having one anti-nodal axis;
- and
- a second pair of normal n=2 modes comprising a third normal mode and a fourth normal mode;
- each of the third and fourth normal modes having two anti-nodal axis;
- at least one of a drive electrode and a sense electrode aligned along the anti-nodal axis of each of the first and second normal modes;
- at least one of a drive electrode and a sense electrode aligned along a first anti-nodal axis of each of the third and fourth normal modes mode;
- and
- a pair of bias tune electrodes aligned with a second anti-nodal axis of each of the third and fourth modes if no drive or sense electrode is aligned with said second anti-nodal axis.
Dependencies are inferred from the claim text.