Initial rapid alignment/calibration of a marine inertial navigation system

Generally, the conventional strapdown marine inertial navigation system needs about 4 hours to settle the initial alignment/calibration under motion. The paper presents an effective approach of the initial rapid alignment/calibration on a strapdown marine inertial navigation system with three fiber...

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Bibliographic Details
Published inProceedings of 1994 IEEE Position, Location and Navigation Symposium - PLANS'94 pp. 348 - 354
Main Authors Morimoto, T., Kumagai, H., Yashiro, T., Ohtsu, K.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1994
Subjects
Accelerometers
Calibration
Inertial navigation
Least squares methods
Motion measurement
Optical fiber filters
Optical fibers
Time measurement
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Summary:Generally, the conventional strapdown marine inertial navigation system needs about 4 hours to settle the initial alignment/calibration under motion. The paper presents an effective approach of the initial rapid alignment/calibration on a strapdown marine inertial navigation system with three fiber optic gyros and three conventional accelerometers. In this approach, a modified least square filter, which implements a pre-filtering scheme of the measured signal disturbed by the ship's motion, is used to improve the accuracy and settling time of alignment/calibration. The accuracy and the settling time in this system are limited by the performance of a modified least square filter of the measured signal. The authors confirmed the validity of this approach to improve greatly the accuracy and the settling time from simulation results.< >
ISBN:9780780314351
0780314352
DOI:10.1109/PLANS.1994.303336