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US 8,146,401 B2Granted
Method and apparatus for in-flight calibration of gyroscope using magnetometer reference
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorRobert D. Frey, Jr.
Life of this patent
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Abstract
The system includes a mobile vessel having a body axis and a steering mechanism. A three-axis gyroscope is mounted within the vessel. A three-axis magnetometer is mounted within the vessel. A programmable device communicates with the three-axis gyroscope, the three-axis magnetometer, and the steering mechanism. The three-axis gyroscope may include three single axis gyroscopes.
Claims20
A calibration system, comprising:
- a mobile vessel having a body axis and a steering mechanism;
- a three-axis gyroscope mounted within the vessel;
- a three-axis magnetometer mounted within the vessel;
- and
- a programmable device in communication with the three-axis gyroscope, the three-axis magnetometer, and the steering mechanism, wherein the three-axis gyroscope receives a calibration reference signal from the magnetometer while the mobile vessel is in flight.
2 more elements
A calibration system comprising,
- a projectile having a body axis and a steering mechanism;
- a three-axis gyroscope mounted within the projectile;
- a three-axis magnetometer mounted within the projectile;
- and
- a programmable device in communication with the three-axis gyroscope, the three-axis magnetometer, and the steering mechanism.
2 more elements
A method for calibration, the method comprising the steps of:
- launching a mobile vessel having a body axis;
- calibrating a three-axis gyroscope mounted within the mobile vessel at least once during a flight of the mobile vessel using a three-axis magnetometer and a programmable device mounted within the vessel;
- and
- altering a direction of the mobile vessel using a steering mechanism based on transformations calculated by the programmable device based on measurements by the gyroscope and a seeker.
1 more element
A method for calibration, the method comprising the steps of:
- launching a mobile vessel having a body axis into the air;
- calibrating a three-axis gyroscope mounted within the mobile vessel using a three-axis magnetometer and a programmable device mounted within the vessel;
- and
- altering a direction of the mobile vessel using a steering mechanism based on transformations calculated by the programmable device based on measurements by the gyroscope and a seeker.
1 more element
Dependencies are inferred from the claim text.