Adaptive Kalman Filter for INS/GPS Integrated Navigation System

Tian Lai Xu

doi:10.4028/www.scientific.net/AMM.336-338.332

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 336-338Adaptive Kalman Filter for INS/GPS Integrated...

Adaptive Kalman Filter for INS/GPS Integrated Navigation System

Abstract:

Inertial Navigation System (INS) and Global Positioning System (GPS) are commonly integrated to overcomes each systems inadequacies and provide an accurate navigation solution. The integration of INS and GPS is usually achieved using a Kalman filter. The accuracy of INS/GPS deteriorates in condition that a priori information used in Kalman filter does not accord with the actual environmental conditions. To address this problem, an improved Sage-Husa filter is presented. In this method, the measurement noise characteristic is adjusted if and only if filtering abnormality exists, avoiding filter instability and reducing computational burden caused by adjusting noise characteristic too frequently in Sage-Husa filter. Simulations in INS/GPS integrated navigation showed improvement in positioning accuracy.

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Periodical:

Applied Mechanics and Materials (Volumes 336-338)

Pages:

332-335

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.336-338.332

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Online since:

July 2013

Authors:

Tian Lai Xu

Keywords:

Adaptive Filter, INS/GPS, Integrated Navigation System, Sage-Husa

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