GYROSCOPIC FAILURE DETECTION IN A NAVIGATION DEVICE THROUGH SENSOR CORRELATION
First Claim
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1. A method of determining the integrity of a gyro in a navigation system, the method comprising:
- detecting a sudden change in one of a pitch, yaw and roll signal from a respective pitch, yaw and roll gyro in the navigation system of a device experiencing coning in an exoatmospheric environment; and
reviewing at least one other of the pitch, yaw and roll signals to verify the sudden change.
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Abstract
A method of determining the integrity of a gyro in a navigation system is provided. The method includes detecting a relatively sudden change in one of a pitch, yaw and roll signal from a respective pitch, yaw and roll gyro and reviewing at least one other of the pitch, yaw and roll signals to verify the relatively sudden change.
18 Citations
19 Claims
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1. A method of determining the integrity of a gyro in a navigation system, the method comprising:
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detecting a sudden change in one of a pitch, yaw and roll signal from a respective pitch, yaw and roll gyro in the navigation system of a device experiencing coning in an exoatmospheric environment; and reviewing at least one other of the pitch, yaw and roll signals to verify the sudden change. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of navigation, the method comprising:
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monitoring roll, pitch and yaw of a device experiencing coning in an free coast environment; generating respective roll, pitch and yaw signals based on the monitoring of the roll, pitch and yaw of the device; monitoring the roll, pitch and yaw signals for sudden changes; and when a sudden change in one of the roll, pitch and yaw signals occurs in the monitored roll, pitch and yaw signals, verify if the signal with the sudden change is valid by verifying a corresponding change in at least one other of the roll, pitch and yaw signals. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A device having a navigation system, the device comprising:
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a primary roll gyro configured to generate a roll signal based on the roll of the device; a primary pitch gyro configured to generate a pitch signal based on the pitch of the device; a primary yaw gyro configured to generate a yaw signal based on the yaw of the device; and a controller adapted to control the navigation of the device based at least in part on the roll, pitch and yaw signals, the controller further configured to monitor each of the roll, pitch and yaw signals for sudden changes and to verify the accuracy of a roll, pitch and yaw signal with the sudden change by verifying a corresponding change in at least one other roll, pitch and yaw signal when the device is experiencing coning in an exoatmospheric environment. - View Dependent Claims (16, 17, 18, 19)
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Specification