Simplification and analysis of IMU conversion error formula for inertial navigation polar simulation test

doi:10.11947/j.AGCS.2022.20210239

Abstract

Abstract: In the simulation system for testing the polar performance of inertial navigation at middle and low latitudes, the IMU conversion error caused by reference error is an important factor affecting the simulation test accuracy. This paper discusses and analyzes its simplified calculation method. Firstly, based on the trajectory transfer rule with constant navigation parameters in the transverse coordinate system of the earth sphere model, the simulation test method and IMU conversion formula are introduced. Secondly, the calculation method of IMU conversion error is studied, and compared with the complete calculation formula, the approximate calculation formula suitable for marine is given, and the coefficient, the magnitude and variation form of each component are analyzed. Finally, using the navigation parameters of the actual voyage, the correctness of the formula is verified. The maximum calculation error of the simplified formula is about 10%, which can meet the requirements of IMU error analysis in the subsequent simulation test.

Key words: inertial navigation, polar navigation, transverse coordinate system, simulation test, IMU, error analysis

CLC Number:

P227.9

BIAN Hongwei, WEN Zhe, MA Heng, WANG Rongying. Simplification and analysis of IMU conversion error formula for inertial navigation polar simulation test[J]. Acta Geodaetica et Cartographica Sinica, 2022, 51(9): 1890-1898.

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