Vibrating-mass gyroscope systems and method
First Claim
1. A vibrating-mass gyroscope system comprising:
- a sensor system comprising a substantially planar vibrating-mass comprising a first surface, a second surface opposite the first surface, and a plurality of electrodes that extend longitudinally in a periodic pattern across at least one of the first and second surfaces, the plurality of electrodes comprising an array of drive electrodes and an array of sense electrodes that are capacitively coupled to a substantially matching array of drive electrodes and a substantially matching array of sense electrodes, respectively, associated with a housing and which are separated from and facing the respective at least one of the first and second surfaces; and
a gyroscope controller configured to generate a drive signal that is provided to one of the array of drive electrodes and the substantially matching array of drive electrodes to provide for an in-plane periodic oscillatory motion of the substantially planar vibrating-mass, is configured to receive a pickoff signal from one of the array of sense electrodes and the substantially matching array of sense electrodes that indicates motion of the substantially planar vibrating-mass resulting from rotation of the vibrating-mass gyroscope system, and configured to generate a force-rebalance signal that is provided to the one of the array of sense electrodes and the substantially matching array of sense electrodes to provide electrostatic force to null the motion of the substantially planar vibrating-mass and to calculate a rotation of the vibrating-mass gyroscope system about an input axis.
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Abstract
A vibrating-mass gyroscope system includes a substantially planar vibrating-mass including opposite first and second surfaces and electrodes that extend longitudinally in a periodic pattern across the first and/or second surfaces. The electrodes include sets of drive and sense electrodes that are capacitively coupled to respective matching sets of drive and sense electrodes associated with a housing and which are separated from and facing the respective first and second surfaces. A gyroscope controller generates a drive signal provided to one of the array of drive electrodes and the substantially matching array of drive electrodes to provide for in-plane periodic oscillatory motion of the vibrating-mass, and generates a force-rebalance signal that is provided to one of the array of sense electrodes and the substantially matching array of sense electrodes to calculate rotation of the vibrating-mass gyroscope system about an input axis.
16 Citations
16 Claims
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1. A vibrating-mass gyroscope system comprising:
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a sensor system comprising a substantially planar vibrating-mass comprising a first surface, a second surface opposite the first surface, and a plurality of electrodes that extend longitudinally in a periodic pattern across at least one of the first and second surfaces, the plurality of electrodes comprising an array of drive electrodes and an array of sense electrodes that are capacitively coupled to a substantially matching array of drive electrodes and a substantially matching array of sense electrodes, respectively, associated with a housing and which are separated from and facing the respective at least one of the first and second surfaces; and a gyroscope controller configured to generate a drive signal that is provided to one of the array of drive electrodes and the substantially matching array of drive electrodes to provide for an in-plane periodic oscillatory motion of the substantially planar vibrating-mass, is configured to receive a pickoff signal from one of the array of sense electrodes and the substantially matching array of sense electrodes that indicates motion of the substantially planar vibrating-mass resulting from rotation of the vibrating-mass gyroscope system, and configured to generate a force-rebalance signal that is provided to the one of the array of sense electrodes and the substantially matching array of sense electrodes to provide electrostatic force to null the motion of the substantially planar vibrating-mass and to calculate a rotation of the vibrating-mass gyroscope system about an input axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for calculating rotation about an input axis in a vibrating-mass gyroscope system, the method comprising:
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monitoring a drive pickoff signal associated with one of an array of drive electrodes that extend longitudinally in a periodic pattern across at least one of a first surface and a second surface of a substantially planar vibrating-mass and a substantially matching array of drive electrodes that extend longitudinally in a periodic pattern across at least one of a first surface and a second surface of a housing, wherein the first surface of the substantially planar vibrating-mass faces the first surface of the housing and the second surface of the substantially planar vibrating-mass faces the second surface of the housing; providing a drive signal to the one of the array of drive electrodes of the substantially planar vibrating-mass and the substantially matching array of drive electrodes of the housing based on the drive pickoff signal to provide an in-plane periodic oscillatory motion of the substantially planar vibrating-mass; monitoring a force-rebalance pickoff signal associated with one of an array of sense electrodes that extend longitudinally in a periodic pattern across at least one of the first and second surfaces of the substantially planar vibrating-mass and a substantially matching array of sense electrodes that extend longitudinally in a periodic pattern across at least one of the first and second surfaces of the housing, the force-rebalance pickoff signal indicating motion of the substantially planar vibrating-mass resulting from rotation of the vibrating-mass gyroscope system; and providing a force-rebalance signal to the one of the array of sense electrodes of the substantially planar vibrating-mass and the substantially matching array of sense electrodes of the housing based on the force-rebalance pickoff signal to provide electrostatic force to null the motion of the substantially planar vibrating-mass and to calculate a rotation of the vibrating-mass gyroscope system about an input axis. - View Dependent Claims (10, 11, 12, 13)
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14. A vibrating-mass gyroscope system comprising:
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a sensor system comprising a plurality of substantially planar vibrating-masses that each comprise a first surface, a second surface opposite the first surface, and a plurality of electrodes that extend longitudinally in a periodic pattern across each of the first and second surfaces, the plurality of electrodes comprising an array of drive electrodes and an array of sense electrodes that are capacitive coupled to a substantially matching array of drive electrodes and a substantially matching array of sense electrodes, respectively, associated with a housing and which are separated from and facing the respective at least one of the first and second surfaces of each of the plurality of vibrating-masses; and a gyroscope controller configured to generate a drive signal that is provided to one of the array of drive electrodes and the substantially matching array of drive electrodes associated with each of the plurality of vibrating-masses to provide for an in-plane periodic oscillatory motion of each of the plurality of substantially planar vibrating-masses, is configured to receive a pickoff signal from one of the array of sense electrodes and the substantially matching array of sense electrodes that indicates motion of each of the respective plurality of vibrating-masses resulting from rotation of the vibrating-mass gyroscope system, and to generate a force-rebalance signal that is provided to the one of the array of sense electrodes and the substantially matching array of sense electrodes associated with each of the plurality of vibrating-masses to provide electrostatic force to null the motion of each of the respective plurality of vibrating-masses and to calculate a rotation of the vibrating-mass gyroscope system about an input axis. - View Dependent Claims (15, 16)
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Specification