Systems Engineering and Electronics ›› 2024, Vol. 46 ›› Issue (4): 1357-1363.doi: 10.12305/j.issn.1001-506X.2024.04.24

• Guidance, Navigation and Control • Previous Articles     Next Articles

Compensation method for gravity disturbance in celestial/inertial integrated system

Yue LENG1,2,3,*, Sheng ZHONG1,2   

  1. 1. School of Artificial Intelligence and Automation, Huazhong University of Science and Technology, Wuhan 430074, China
    2. National Key Laboratory of Multispectral Information Intelligent Processing Technology, Wuhan 430074, China
    3. Wuhan National Research Center for Optoelectronics, Huazhong Institute of Electro-Optics, Wuhan 430223, China
  • Received:2023-06-06 Online:2024-03-25 Published:2024-03-25
  • Contact: Yue LENG

Abstract:

Aiming at the problem that the measurement error of the benchmark gesture caused by the gravity disturbance leads to the decline in the positioning accuracy of the celestical/inertial integrated navigation system, the compensation method of gravity disturbance in celestical/inertia integrated navigation is proposed. Firsttly, the main factor affecting the positioning accuracy of the celestical/inertia integrated navigation system is analyzed based on the navigation error model. Secondly, the mechanism of the communication error between gravity disturbance, inertia level benchmark gesture measuring error and celestical navigation positioning error. Then, the modeling and correction methods of gravity disturbance is studied and used in navigation solution circuits in the benchmark of inertial levels to achieve the effective compensation for gravity disturbances. The results of the sports car test show that the gravity disturbance compensation method proposed in this paper can reduce the oscillation amplitude of the positioning error of the celestial/inertial integrated navigation system from 1.6 n mile to 0.5 n mile.

Key words: celestial navigation system, inertial navigation system (INS), integrated navigation system, gravity disturbance

CLC Number: 

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