Systems Engineering and Electronics ›› 2020, Vol. 42 ›› Issue (1): 172-178.doi: 10.3969/j.issn.1001-506X.2020.01.23

Previous Articles     Next Articles

Position updating and error analysis of SINS alignment for moving base

Zhenjun CHANG1(), Zhili ZHANG1(), Zhaofa ZHOU1(), He CHEN2()   

  1. 1. State Key Discipline Laboratory of Armament Launch Theory and Technology, Rocket Force University of Engineering, Xi'an 710025, China
    2. System Engineering Institute, Rocket Force Research Academy, Beijing 100085, China
  • Received:2019-03-20 Online:2020-01-01 Published:2019-12-23
  • Supported by:
    国家自然科学基金(41174162)

Abstract:

In order to improve the robustness and get position information in initial alignment of strapdown inertial navigation system for moving vehicles, an moving based inertial coordination alignment method based on position update is presented, and the influence of position error is analyzed. Model of double-vector and multi-vector alignment is established through inertial coordination solidification, and a position update algorithm in inertial coordinate system alignment for moving base is proposed by which measured vector will be calculated through measured velocity, and position will be reckoned through attitude alternating and integration. Moreover, the alignment error with position error is analyzed. It is verified by experiment that inertial coordination multi-vector alignment takes more advantage of measured vectors, and gets better robustness of alignment than double-vector alignment. Position error will affect the accuracy of alignment for moving base. The precision of alignment is improved by position update for moving base, and position will be provided for following navigation when alignment has been done.

Key words: strapdown inertial navigation, initial alignment, moving base, position update

CLC Number: 

[an error occurred while processing this directive]