A RATE INTEGRATING FIBER OPTIC GYRO

J. Mark, D. Tazartes, B. Fidric, and A. Cordova

Peer Reviewed

Abstract: In the past, fiber optic gyros have generally been viewed as angular rate sensors. However, for inertial navigation purposes, a “rate integrating” gyro characteristic is desired. The distinction is subtle, but important. A rate gyro’s output represents an estimate of instantaneous angular rate. The system attitude is determined by sampling the rate and integrating numerically to angular displacement. On the other hand, a rate integrating gyro provides the change in rotation angle rather than instantaneous rate. The system accumulates the angular increments obtained from the gyro to determine rotation angle and, hence, attitude. A ring laser gyro is a good example of a rate integrating sensor. Its output consists of pulses that represent fixed angle increments. It is shown that an interferometric fiber optic gyro can also be configured as a rate integrating gyro. The paper discusses the theory and application of this concept.
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 38, Number 4
Pages: 341 - 354
Cite this article: Mark, J., Tazartes, D., Fidric, B., Cordova, A., "A RATE INTEGRATING FIBER OPTIC GYRO", NAVIGATION, Journal of The Institute of Navigation, Vol. 38, No. 4, Winter 1991-1992, pp. 341-354.
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