Systems Engineering and Electronics ›› 2024, Vol. 46 ›› Issue (2): 668-674.doi: 10.12305/j.issn.1001-506X.2024.02.30

• Guidance, Navigation and Control • Previous Articles    

Fault self-checking method of Kalman filter and its application for initial alignment of SINS

Shiluo GUO1,2, Chunyu WANG2,*, Yang LI2, Peng TIAN3   

  1. 1. College of Information and Communication, National University of Defense Technology, Wuhan 430019, China
    2. Aviation Combat Duty College, Aviation University Air Force, Changchun 130022, China
    3. Unit 93152 of the PLA, Tonghua 135300, China
  • Received:2022-03-22 Online:2024-01-25 Published:2024-02-06
  • Contact: Chunyu WANG

Abstract:

Kalman filter is commonly used in initial alignment and integrated navigation of inertial navigation system. Under the condition of abnormal system noise and observation noise, the filter will appear to decline in accuracy or even divergence. In order to solve this problem, two anomaly test criterias for filter based on covariance matching of the new information and Mahalanobis distance chi-square test are analyzed in theory. Considering the typical applications of the proposed criteria in conventional Kalman filter, unscented Kalman filter and cubature Kalman filter, a test is designed based on the initial alignment of strapdown inertial navigation system. Performances of these two test criteria methods under the condition of abnormal system noise and observation noise are verified. However, the strictness of the test criteria is different and the tailing effect have appeared. Therefore, some suggestions in practical application are also given.

Key words: inertial navigation system, initial alignment, Kalman filter, anomaly test criteria

CLC Number: 

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