GYRO DRIFT DETECTION AND ISOLATION FOR A TWO-IMU CONFIGURATION

J. H. Hunter

Abstract: A TECHIQUE TO IDENTIFY and isolate gyro drift within a two-IMU configuration is presented. The unique gyro drift modulation of the Delco Electronics Carousel V is utilized. The Carousel V system differs from conventional gimbaled systems in that four of the inertial instruments (x and y accelerometers and gyros) are mounted on a rotating (1 rpm) instrument cluster. Excessive drift of any gyro results in a distinct combination of sinusoid, ramp, and bias functions appearing in components of a platform-to platform relative rotation vector. Isolation of any particular drifting gyro within two identical Carousel V platforms is assured by an approximately orthogonal alignment of the cluster rotational axes. Gyro drift isolation between two platforms requires neither a hardware difference in platforms nor the application of redundant sensors within any individual platform.
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 19, Number 4
Pages: 327 - 337
Cite this article: Hunter, J. H., "GYRO DRIFT DETECTION AND ISOLATION FOR A TWO-IMU CONFIGURATION", NAVIGATION, Journal of The Institute of Navigation, Vol. 19, No. 4, Winter 1972-1973, pp. 327-337.
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