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Accession Number ADA564651
Title Ground Vehicle Navigation Using Magnetic Field Variation.
Publication Date Sep 2012
Media Count 186p
Personal Author J. A. Shockley
Abstract The Earth's magnetic field has been the bedrock of navigation for centuries. The latest research highlights the uniqueness of magnetic field measurements based on position due to large scale variations as well as localized perturbations. These observable changes in the Earth's magnetic field as a function of position provide distinct information which can be used for navigation. This dissertation describes ground vehicle navigation exploiting variation in Earth's magnetic field using a self-contained navigation system consisting of only a magnetometer and magnetic field maps. In order to achieve navigation, effective calibration enables repeatable magnetic field measurements from different vehicles and facilitates mapping of the observable magnetic field as a function of position. A new modified ellipsoid calibration technique for strapdown magnetometers in large vehicles is described, as well as analysis of position measurement generation comparing a multitude of measurement compositions using existing and newly developed likelihood techniques. Finally, navigation solutions are presented.
Keywords Geomagnetism
Ground vehicles
Magnetic fields
Navigation
Perturbations


 
Source Agency Non Paid ADAS
NTIS Subject Category 63D - Magnetic Detection
76D - Navigation Systems
Corporate Author Air Force Inst. of Tech., Wright-Patterson AFB, OH. Graduate School of Engineering and Management.
Document Type Thesis
Title Note Doctorial thesis.
NTIS Issue Number 1303
Contract Number N/A

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