Navigation System Error Indirect Correction using Inertial Navigation System's Information Stability

LIU Yi; SUN Xu; LI Yun-hong
January 2014
Journal of Signal Processing;Jan2014, Vol. 30 Issue 1, p100
Academic Journal
The performance of conventional Inertial Navigation System (INS) augmentation approach is subject to the accuracy of external aiding sensors, for which the accumulated INS error couldn't be fully eliminated. A novel INNS correction method is proposed, which take the advantage of high stability of INS solution in short-term. INS error was estimated by data fusion of INS output without aiding and external sensor measurement and it was then applied in INS augmentation. The location accuracy of INS was enhanced in comparison with sensor accuracy. A representative scenario augmenting INS using the radar seeker measurement during missile mid course flight, was then discussed to help explain this novel aiding method using data fusion method. Lastly, the validity of proposed approach in INS aiding was then tested by simulation.


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