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Application of the least square filtering in initial alignment of SINS

  • Long Zhao*
  • , Li Wang
  • *Corresponding author for this work
  • Beihang University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

When the statistics of the system noise and the observation noise are unknown, or almost unknown, the state estimation error computed by Kalman Filtering will be much bigger, or the Kalman Filter may become divergence. In order to avoid this demerit, a Least Square Filtering is presented. It weighs the observation data adaptively only without the requirement of the statistics of the noise. This algorithm is used to Strapdown Inertial Navigation System (SINS) initial alignment and compared with the Kalman Filtering. The simulation results show that the Least Square (LS) Filtering has faster convergent speed than the Kalman Filtering.

Original languageEnglish
Title of host publicationSeventh International Symposium on Instrumentation and Control Technology
Subtitle of host publicationMeasurement Theory and Systems and Aeronautical Equipment
DOIs
StatePublished - 2008
Event7th International Symposium on Instrumentation and Control Technology: Measurement Theory and Systems and Aeronautical Equipment - Beijing, China
Duration: 10 Oct 200813 Oct 2008

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7128
ISSN (Print)0277-786X

Conference

Conference7th International Symposium on Instrumentation and Control Technology: Measurement Theory and Systems and Aeronautical Equipment
Country/TerritoryChina
CityBeijing
Period10/10/0813/10/08

Keywords

  • Initial alignment
  • Kalman filtering
  • Least square filtering
  • Strapdown inertial navigation system

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