A Novel Gyrocompass Alignment Method Under Large Azimuth Misalignment Angle

doi:10.1007/s12204-015-1617-8

Abstract

Abstract: Conventional gyrocompass alignment methods are based on relatively small azimuth misalignment angles. However, a marine strapdown inertial navigation system may face large azimuth misalignment angle caused by a failed coarse alignment algorithm. This paper provides a novel gyrocompass alignment method to solve the problem. Effects of system parameters are analyzed and the proper scenario of parameter switch based on the classic control theories is derived. Test results show that compared with the conventional methods, our method can accomplish the initial alignment quickly and accurately under large azimuth misalignment angle.

Key words: strapdown| inertial navigation system| alignment

摘要： Conventional gyrocompass alignment methods are based on relatively small azimuth misalignment angles. However, a marine strapdown inertial navigation system may face large azimuth misalignment angle caused by a failed coarse alignment algorithm. This paper provides a novel gyrocompass alignment method to solve the problem. Effects of system parameters are analyzed and the proper scenario of parameter switch based on the classic control theories is derived. Test results show that compared with the conventional methods, our method can accomplish the initial alignment quickly and accurately under large azimuth misalignment angle.

关键词: strapdown| inertial navigation system| alignment

CLC Number:

U 666.1

WEI Feng-mei1,2* (魏凤梅), ZHANG Jian-pei1 (张健沛), YANG Jing1 (杨静),JIANG Shu-qiang3 (姜述强), XIE Song-lin3,4 (谢松霖). A Novel Gyrocompass Alignment Method Under Large Azimuth Misalignment Angle[J]. Journal of shanghai Jiaotong University (Science), 2015, 20(5): 558-564.

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