Method of determining a speed of rotation of an axially symmetrical vibrating sensor, and a corresponding inertial device
First Claim
1. A method of determining a speed of rotation of an axially symmetrical vibrating sensor having a vibrating member associated with control electrodes and with detection electrodes for generating vibration presenting an elastic line possessing periodicity of order n and having a position that is variable as a function of a rotation of the sensor, the method comprising the steps of:
- performing evaluations of the speed of rotation successively for a predetermined number of positions of the vibration relative to the detection electrodes;
the positions being geometrically offset relative to each other and the vibration being moved from one position to another by applying a precession command using a pre-established scale factor;
determining a speed of rotation in function of the evaluations.
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Abstract
A method and device of determining a speed of rotation of an axially symmetrical vibrating sensor. The sensor has a vibrating member associated with control electrodes and with detection electrodes for generating a vibration presenting an elastic line possessing periodicity of order n and having a position that is variable as a function of the rotation of the sensor. The method includes performing successive evaluations of the speed for a predetermined number of positions of the vibration relative to the electrodes. The positions are geometrically offset relative to each other and the vibration is moved from one position to another by applying a precession command using a pre-established scale factor. The method also includes determining a speed of rotation in function of the evaluations.
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Citations
21 Claims
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1. A method of determining a speed of rotation of an axially symmetrical vibrating sensor having a vibrating member associated with control electrodes and with detection electrodes for generating vibration presenting an elastic line possessing periodicity of order n and having a position that is variable as a function of a rotation of the sensor, the method comprising the steps of:
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performing evaluations of the speed of rotation successively for a predetermined number of positions of the vibration relative to the detection electrodes;
the positions being geometrically offset relative to each other and the vibration being moved from one position to another by applying a precession command using a pre-established scale factor;determining a speed of rotation in function of the evaluations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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- 13. An inertial device comprising an axially symmetrical vibrating sensor having a vibrating member associated with control electrodes and with detection electrodes, and means for exciting the sensor so as to generate a vibration presenting an elastic line possessing periodicity of order n, the device including means for successively performing evaluations of speed of rotation of the sensor while the vibration is in each one of a predetermined number of positions geometrically offset relative to the detection electrodes, means for applying a precession command using a pre-established scale factor to move the vibration from one position to another, and means for determining a speed of rotation in function of the evaluations.
Specification