A Rate Integrating Fiber Optic Gyro

From the Theoretical Concept to System Mechanization

Published in: SPIE Proceedings , v. 1585, Fiber Optic Gyros: 15th Anniversary Conference, Feb. 1, 1992, p. 437-448

by Bernard G. Fidric, Daniel A. Tazartes, Amado Cordova, John G. Mark

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In the past, the interferometric fiber optic gyro (IFOG) has generally been viewed as an angular rate sensor. This may appear true on a coarse time scale. However, a study of its behavior within the transit time of light through the fiber optic coil shows that, in reality, the IFOG is a rate integrating gyro with a very short memory. Making use of fast sampling and accumulation, the rate integrating characteristic can be retained. Mechanized that way Litton IFOG exhibits an output response which is similar to an RLG. As such, it is well suited for navigation in wideband vibration environments.

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