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Journal of Projectiles, Rockets, Missiles and Guidance >

2024 , Vol. 44 >Issue 5: 8 - 13

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2024.05.002

A High-accuracy Transfer Alignment Method Under Moving Base

  • YANG Jie 1 ,
  • WANG Xinlong 1 ,
  • WANG Bin 2 ,
  • NIE Guanghao 2 ,
  • DING Wei 2
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  • 1 School of Astronautics,Beihang University,Beijing 100083,China
  • 2 Beijing Institute of Control & Electronic Technology,Beijing 100038,China

Received date: 2024-10-03

  Online published: 2024-12-18

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Abstract

During the transfer alignment under moving base, the flexible deformation between the master and slave inertial navigation systems (INSs) is the primary error factor affecting the alignment accuracy of the slave INS. In traditional transfer alignment methods, flexible deformation is usually equated to empirical Markov models. However, a low match between actual flexible deformation and the empirical model can lead to a decrease in transfer alignment accuracy. Therefore, a high-accuracy transfer alignment method without relying on empirical model of flexible deformation is proposed. Firstly, the intrinsic relationship between the flexible deformation and the angular velocities measured by master/slave gyroscopes is derived and established. Thus, the rough value of flexible deformation is directly calculated using the measured angular velocities. Then, the coupling relationship between the calculation error of flexible deformation and the gyroscope error is derived, and a novel transfer alignment system model that does not rely on empirical models of flexible deformation is established. Furthermore, the optimal estimation algorithm is used to accurately estimate and correct the calculation error of flexible deformation. Simulation results show that the proposed method can accurately compensate the complex flexible deformation, thereby achieving high-accuracy transfer alignment under moving base.

Key words： inertial navigation system; transfer alignment; flexible deformation; gyroscope; optimal estimation

Cite this article

YANG Jie , WANG Xinlong , WANG Bin , NIE Guanghao , DING Wei . A High-accuracy Transfer Alignment Method Under Moving Base[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2024 , 44(5) : 8 -13 . DOI: 10.15892/j.cnki.djzdxb.2024.05.002

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