A System-level Calibration Method for Laser Gyro SINS

doi:10.3969/j.issn.1000-1093.2019.08.009

Abstract

Abstract: An exciting method of rotating the turntable outer axis for an integer period is designed to optimize the system-level calibration method of calibrating a strapdown inertial navigation system (SINS) on the horizontal three-axis turntable. Based on the SINS error equation, the relationships among velocity errors and inertia measurement unit (IMU) errors are described, and a system-level calibration model of IMU is established. In the proposed model, the interaction effect of error parameters of accelerometer and gyro is avoided due to that the northward component contains the accelerometer errors and the eastward component contains the gyro errors only. According to the quasi-D optimal criterion, a 12-point plan of the icosahedron is designed, and 24 error terms of IMU are identified by least square method when one axis runs in the speed mode and the other axes run in the position mode. The simulated results show that the influences of the accelerometer and gyro measurement noises on the system-level calibration results are effectively restrained, and the error terms are identified accurately. Key

Key words: strapdowninertialnavigationsystem, accelerometer, gyro, systematiccalibration, intertialmeasurementunit, errorparameter

CLC Number:

V249.32⁺2

DONG Chunmei， REN Shunqing， CHEN Xijun， LI Wei. A System-level Calibration Method for Laser Gyro SINS[J]. Acta Armamentarii, 2019, 40(8): 1618-1626.

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第40卷
第8期2019 年8月兵工学报ACTA
ARMAMENTARIIVol.40No.8Aug.2019

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