Calibration Method of Dimension Error of Accelerometer in Single-axial Rotation SINS

doi:10.3969/j.issn.1000-1093.2017.07.009

Abstract

Abstract: Accelerometer dimension error leads to navigation velocity error under the carrier angular movement in strapdown inertial navigation system (SINS). This is particularly significant in single-axial rotation SINS. In order to improve the navigation accuracy, a new method is presented to realize the calibration of accelerometer dimension errors. A mathematical model of navigation and dimension errors is established by analyzing the mechanism of action of dimension errors in rotary condition. The equivalent errors of accelerometers are introduced into system as extended measurements to improve calibration effect. A calibration route is designed by observability analysis. The dimension error parameters are acquired by filtering. The simulated and experimental results show that the proposed method has higher calibration accuracy and speed compared with the method that uses speed error as observed quantity, and the amount of navigation velocity errors is decreased by about 50%.Key

Key words: ordnancescienceandtechnology, rotarymodulation, dimensioneffect, extendedmeasurement, observabilityanalysis, errorcalibration

CLC Number:

TJ765.2⁺31

WANG Kun-ming, XIE Jian, ZHOU Zhao-fa. Calibration Method of Dimension Error of Accelerometer in Single-axial Rotation SINS[J]. Acta Armamentarii, 2017, 38(7): 1314-1321.

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第38卷
第7期2017 年7月兵工学报ACTA
ARMAMENTARIIVol.38No.7Jul.2017

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