Analysis of Error Characteristics of Laser Gyro SINS Based on Analytic Alignment Method

doi:10.3969/j.issn.1000-1093.2018.03.012

Abstract

Abstract: Error characteristics of initial alignment of laser gyro SINS are analyzed for selection of inertial sensors. Based on the incremental formula of analytic alignment method, the misalignment angle due to the measurement errors of inertial sensors is derived using the parameter perturbation technique, and its random characteristics are analyzed. The attitude angle errors caused by the alignment angle are worked out based on the relationship between attitude angle and attitude matrix. Finally, the theoretically analyzed results are verified through simulation and experiment. The studied results show that the means values of alignment errors depend on the constant errors of inertial sensors and the attitude of vehicle rather than alignment time, while the standard deviation of alignment errors is not only affected by the random walk errors of inertial sensors and the attitude of vehicle, but also is inversely proportional to the square root of alignment time.Key

Key words: strapdowninertialnavigation, analyticalignment, incrementalalgorithm, attitudeerror, randomcharacteristic

CLC Number:

V448.22⁺4

CHEN He, ZHANG Zhi-li, ZHOU Zhao-fa, LIU Peng-peng, ZHAO Xiao-feng. Analysis of Error Characteristics of Laser Gyro SINS Based on Analytic Alignment Method[J]. Acta Armamentarii, 2018, 39(3): 502-510.

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第39卷
第3期2018 年3月兵工学报ACTA
ARMAMENTARIIVol.39No.3Mar.2018

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