Time-varying Parameters Based Gyrocompass Alignment for Marine SINS with Large Heading Misalignment

F. Sun, J. Xia, Y. Ben, H. Lan

Abstract:	Gyrocompass alignment algorithm is a fine alignment technique based on gyrocompass effect and loop feedback control theory. Conventional strapdown gyrocompass alignment methods are based on the assumption that the system has a small heading misalignment angle. However, a large heading misalignment angle would exist during the alignment duration under some conditions, especially for marine strapdown inertial navigation system (SINS). This paper proposed a time-varying parameters based gyrocompass alignment method to solve this problem. Error model of gyrocompass alignment with large heading misalignment error is presented and an appropriate multi-parameter setting is given, a proper scenario for parametric switch is also derived. Simulation and experimental results show that the proposed method has better alignment performance than conventional ones when the system has a large heading misalignment angle.
Published in:	Proceedings of IEEE/ION PLANS 2014 May 5 - 8, 2014 Hyatt Regency Hotel Monterey, CA
Pages:	1379 - 1383
Cite this article:	Sun, F., Xia, J., Ben, Y., Lan, H., "Time-varying Parameters Based Gyrocompass Alignment for Marine SINS with Large Heading Misalignment," Proceedings of IEEE/ION PLANS 2014, Monterey, CA, May 2014, pp. 1379-1383. https://doi.org/10.1109/PLANS.2014.6851513
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