Geomagnetic/inertial navigation integrated matching navigation method

Area of Science:

• Geophysics
• Navigation Systems
• Aerospace Engineering

Background:

• Geomagnetic reference map accuracy limits traditional geomagnetic navigation.
• Aircraft navigation in unknown environments is challenging without prior map data.

Purpose of the Study:

• To propose a geomagnetic/INS integrated matching navigation algorithm for long-scale navigation.
• To enable navigation tasks irrespective of the availability of an a priori geomagnetic map.
• To enhance aircraft navigation capabilities in complex geomagnetic environments.

Main Methods:

• Combines magnetogram-based matching navigation with a map-free geomagnetic bionic navigation method.
• Analyzes navigation trajectory in areas with available geomagnetic maps.
• Corrects matching results using inertial navigation system filters.
• Utilizes a non-magnetic map navigation method for unknown areas.

Main Results:

• The proposed algorithm effectively performs navigation tasks with or without a prior geomagnetic map.
• Simulations demonstrate the algorithm's robustness against geomagnetic map distribution and noise effects.
• The integrated approach enhances navigation accuracy in complicated geomagnetic environments.

Conclusions:

• The developed geomagnetic/INS integrated algorithm offers a reliable solution for long-scale aircraft navigation.
• This method significantly improves navigation performance in environments with limited or no prior geomagnetic map data.
• The algorithm provides a robust and effective navigation strategy for complex real-world scenarios.