极区坐标系下惯导粗对准精度一致性分析

doi:10.12305/j.issn.1001-506X.2025.01.28

Abstract

Abstract:

In view of the current situation that the description of the alignment ability of the polar inertial navigation system needs to be further clarified, the consistency of coarse alignment of strapdown inertial navigation system in the polar frame is analyzed and proved. Firstly, taking the three-axis attitude determination-based coarse alignment method as an example, the error characteristics of the alignment results in traditional navigation frame are derived by using the total differential formula, where the misalignment angle in up direction diverges rapidly with increasing latitude. Then, the relation between the misalignment angle of coarse alignment and sensor error in grid frame, pseudo-earth frame and earth-centered earth-fixed coordinate system is constructed respectively, and the misalignment angle expression is obtained which is consistent with the traditional navigation frame. Finally, simulation experiments verify that multiple coarse alignment methods get the same alignmeat effect under different frames, and further verify the correctness of theoretical analysis.

Key words: polar inertial navigation, coarse alignment, grid frame, pseudo-earth frame, consistency analysis

CLC Number:

U666.1

Siyuan BAI, Hongzhou CHAI, Kaidi JIN, Qing WU, Minzhi XIANG. Consistency analysis of inertial navigation coarse alignment accuracy in polar frame[J]. Systems Engineering and Electronics, 2025, 47(1): 280-286.

Figures/Tables 8

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References 30

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对准算法	误差角	n系	g系	p系	e系
TRIAD	横滚	0.150 9	0.150 9	0.150 9	0.150 9
	俯仰	-0.006 1	-0.006 1	-0.006 1	-0.006 1
	航向	2.594 1	2.594 1	2.594 1	2.594 1
O-TRIAD	横滚	0.002 9	0.002 9	0.002 9	0.002 9
	俯仰	-0.002 8	-0.002 8	-0.002 8	-0.002 8
	航向	2.523 6	2.523 6	2.523 6	2.523 6
ODV-ADIA	横滚	0.003 0	0.003 0	0.003 0	0.003 0
	俯仰	-0.002 0	-0.002 0	-0.002 0	-0.002 0
	航向	1.718 6	1.718 6	1.718 6	1.718 6
OBA	横滚	0.003 1	0.003 1	0.003 1	0.003 1
	俯仰	-0.002 3	-0.002 3	-0.002 3	-0.002 3
	航向	0.719 3	0.719 3	0.719 3	0.719 3

对准算法	误差角	n系	g系	p系	e系
TRIAD	横滚	5.019 4	5.019 4	5.019 4	5.019 4
	俯仰	-10.003 9	-10.003 9	-10.003 9	-10.003 9
	航向	116.529 6	116.529 6	116.529 6	116.529 6
O-TRIAD	横滚	5.002 5	5.002 5	5.002 5	5.002 5
	俯仰	-10.002 3	-10.002 3	-10.002 3	-10.002 3
	航向	116.460 2	116.460 2	116.460 2	116.460 2
ODV-ADIA	横滚	5.002 6	5.002 6	5.002 6	5.002 6
	俯仰	-10.001 8	-10.001 8	-10.001 8	-10.001 8
	航向	117.394 1	117.394 1	117.394 1	117.394 1
OBA	横滚	5.002 6	5.002 6	5.002 6	5.002 6
	俯仰	-10.001 9	-10.001 9	-10.001 9	-10.001 9
	航向	117.109 2	117.109 2	117.109 2	117.109 2

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Consistency analysis of inertial navigation coarse alignment accuracy in polar frame

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