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 the rotation of the sensor, the method comprising the steps of:
- performing a first evaluation of the speed of rotation when the vibration is in a first position relative to the control electrodes and the detection electrodes;
applying a precession command using a pre-established scale factor until the vibration reaches a second position geometrically offset by π
/n relative to the first position;
performing a second evaluation of the speed of rotation while the vibration is in the second position; and
taking a mean of the evaluations of the speed of rotation in the first position and in the second position.
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Accused Products
Abstract
The method of determining the speed of rotation of an axially symmetrical vibrating sensor of order 2. The method includes:
performing a first evaluation of the speed of rotation while a vibration generated by the vibrating sensor lies in a first position relative to electrodes generating the vibration;
applying a precession command so that the vibration comes successively into positions that are offset by 45°, 90°, and 135° relative to the first position;
performing evaluations of the speed of rotation while the vibration lies in the offset positions; and
taking a mean of the evaluations of the speed of rotation in the various positions of the vibration.
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Citations
10 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 the rotation of the sensor, the method comprising the steps of:
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performing a first evaluation of the speed of rotation when the vibration is in a first position relative to the control electrodes and the detection electrodes; applying a precession command using a pre-established scale factor until the vibration reaches a second position geometrically offset by π
/n relative to the first position;performing a second evaluation of the speed of rotation while the vibration is in the second position; and taking a mean of the evaluations of the speed of rotation in the first position and in the second position. - View Dependent Claims (2, 3, 4, 5, 6)
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7. 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, the device including means for performing a first evaluation of the speed of rotation of the sensor while the vibration is in a first position relative to the control electrodes and the detection electrodes, means for applying a precession command using a pre-established scale factor until the vibration reaches a second position offset by π
- /n relative to the first position, where n is a periodicity order of an elastic line of the sensor, means for performing a second evaluation of the speed of rotation of the sensor while the vibration is in the second position, and means for taking a mean between the evaluations of the speed of rotation of the sensor in the first position of the vibration and in the second position of the vibration.
- View Dependent Claims (8, 9, 10)
Specification