Gyroscopic measurement by a vibratory gyroscope
First Claim
1. A method of gyroscopic measurements supplied by a gyroscopic system including a vibratory gyroscope;
- said gyroscope vibrating in an initial first vibration geometrical position and supplying a measurement signal;
wherein there is applied to the vibratory gyroscope over a period of time a periodic command signal adapted;
to cause the vibration geometrical position to turn a first way, during one part of the time period, causing a change, in accordance with a first speed profile, of the position of the vibration of said gyroscope from the first vibration geometrical position to a second vibration geometrical position; and
to cause the vibration geometrical position to turn a second way opposite the first way during the other part of the time period, causing a change in accordance with a second speed profile of the position of the vibration of said gyroscope from the second vibration geometrical position to the first vibration geometrical position;
said command signal having a zero average over said time period, and the first and second speed profiles indicating a speed variation of the change of vibration geometrical position as a function of time; and
wherein the measurements supplied by the gyroscopic system are based on a corrected signal representing a variation of vibration geometrical position values and obtained by subtracting the command signal from the measurement signal supplied by the gyroscope.
2 Assignments
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Accused Products
Abstract
A gyroscopic system supplies measurements on the basis of a vibratory gyroscope, which vibrates in a first vibration position and supplies a measurement signal. A periodic command signal is applied to it over a time period to cause the vibration geometrical position to turn a first way during one part of the time period, causing a change in accordance with a first speed profile from the first position to a second position; and to cause the vibration geometrical position to turn a second way opposite the first way during the other part of the time period, causing a change in accordance with a second speed profile from the second position to the first position. The speed profiles indicate a speed variation of the change of position. The measurements supplied by the system are then based on a corrected signal obtained by subtracting the command signal from the measurement signal supplied by the gyroscope.
7 Citations
13 Claims
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1. A method of gyroscopic measurements supplied by a gyroscopic system including a vibratory gyroscope;
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said gyroscope vibrating in an initial first vibration geometrical position and supplying a measurement signal; wherein there is applied to the vibratory gyroscope over a period of time a periodic command signal adapted; to cause the vibration geometrical position to turn a first way, during one part of the time period, causing a change, in accordance with a first speed profile, of the position of the vibration of said gyroscope from the first vibration geometrical position to a second vibration geometrical position; and to cause the vibration geometrical position to turn a second way opposite the first way during the other part of the time period, causing a change in accordance with a second speed profile of the position of the vibration of said gyroscope from the second vibration geometrical position to the first vibration geometrical position; said command signal having a zero average over said time period, and the first and second speed profiles indicating a speed variation of the change of vibration geometrical position as a function of time; and wherein the measurements supplied by the gyroscopic system are based on a corrected signal representing a variation of vibration geometrical position values and obtained by subtracting the command signal from the measurement signal supplied by the gyroscope. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A gyroscopic system including:
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a vibratory gyroscope, said gyroscope vibrating in an initial first vibration geometrical position and supplying a measurement signal; a command unit adapted to apply a periodic command signal over a time period adapted; to cause the vibration geometrical position to turn a first way, during one part of the time period, causing a change in accordance with a first speed profile of the position of the vibration of said gyroscope from the first vibration geometrical position to a second vibration geometrical position; and to cause the vibration geometrical position to turn a second way opposite the first way during the other part of the time period, causing a change in accordance with a second speed profile of the position of the vibration of said gyroscope from the second vibration geometrical position to the first vibration geometrical position; said command signal having a zero average over said time period and the first and second speed profiles indicating a speed variation of the change of vibration geometrical position as a function of time; and a processing unit adapted to supply a corrected signal representing a variation of vibration geometrical position values obtained by subtracting the command signal from the measurement signal supplied by the vibratory gyroscope. - View Dependent Claims (10, 11, 12, 13)
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Specification