10.57647/j.mjee.2025.16846

Enhanced Navigation Accuracy Using Nonlinear Kalman Filters in INS/GPS Integration

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  • Mohammadreza Mollaei1,
  • Mohsen Shafieirad*1,
  • Elahe Moradi2,
  1. Department of Electrical and Computer Engineering, University of Kashan, Kashan, Iran
  2. Department of Electrical Engineering, YI.C., Islamic Azad University, Tehran, Iran

Received: 2025-01-16

Revised: 2025-02-20

Accepted: 2025-04-27

Copyright (c) 2025 Mohammadreza Mollaei, Mohsen Shafieirad, Elahe Moradi (Author)

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Mollaei, M., Shafieirad, M., & Moradi, E. Enhanced Navigation Accuracy Using Nonlinear Kalman Filters in INS/GPS Integration. Majlesi Journal of Electrical Engineering. https://doi.org/10.57647/j.mjee.2025.16846
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Abstract

This study explores the challenges of error accumulation in inertial navigation systems (INS) and presents a solution to enhance navigation accuracy. To address these errors, INS data is integrated with GPS using advanced nonlinear Kalman filters, specifically the Unscented Kalman Filter (UKF) and the Particle Kalman Filter (PKF). These methods are applied to a six-degree-of-freedom fixed-wing aircraft model, and their performance is evaluated under both GPS-enabled and GPS-denied conditions. The results show that nonlinear filters, particularly the PKF, outperform the Extended Kalman Filter (EKF) in providing accurate position and velocity estimates, while also preventing system divergence during GPS outages. This study confirms that integrating INS and GPS with advanced nonlinear filters can significantly enhance navigation accuracy and reliability.

Keywords

  • Nonlinear Kalman filter,
  • Particle Kalman Filter,
  • Inertial Navigation,
  • GPS Outage
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