IFOG Technology for Gyrocompass Applications

Eric Goldner, David Rozelle, Allan Brockstein, Amado Cordova, Ronald Michal, Ralph Patterson, James Steele and Joseph DeFato

Abstract:	Interferometric fiber optic gyros (IFOGs) were fabricated and evaluated to demonstrate the feasibility of their use as rotation rate sensors within replacement gyrocompass systems. Bias repeatability of 0.008 deg/hr, input axis mis- alignment repeatability of 0.68 arcsec, scale factor repeat- abilit of 4.5 ppm, and angle random walk of 0.0034 P deg/ hr were demonstrated. The measured gyro perfor- mance was included within system simulations to predict overall system performance for a series of gyrocompass scenarios. The results of the simulations showed that when mechanized with IFOGs similar to those tested, the perfor- mance specifications of the ANIWSN-U2A gyrocompass can be achieved without the need for a vertical axis turnta- ble for periodic self-calibration. IFOGs were shown to be a strong candidate for the rotation rate sensors within upgrades and future Navy gyrocompass systems.
Published in:	Proceedings of the 51st Annual Meeting of The Institute of Navigation (1995) June 5 - 7, 1995 Antlers Doubletree Hotel Colorado Springs, CO
Pages:	585 - 594
Cite this article:	Goldner, Eric, Rozelle, David, Brockstein, Allan, Cordova, Amado, Michal, Ronald, Patterson, Ralph, Steele, James, DeFato, Joseph, "IFOG Technology for Gyrocompass Applications," Proceedings of the 51st Annual Meeting of The Institute of Navigation (1995), Colorado Springs, CO, June 1995, pp. 585-594.
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