Research On The Geomagnetic Navigation Matching Algorithm And The Geomagnetic Field Simulation System

As a novel passive navigation method, the geomagnetic aided navigation system is not influenced by weather, terrain and other factors, can work in all time, all seasons and all regions. As a new navigation method, it's is widely used in the aviation, aerospace, marine and other fields, and will play an important role. So, it has important theoretical and practical significance to carry out theoretical research of the geomagnetic aided navigation, and to establish the geomagnetic field simulation system for the assessment and verification of the geo magnetic navigation system.As one of the key technologies in the geomagnetic aided navigation system, the matching algorithm will directly affect the navigation accuracy and matching efficiency of the system. This paper firstly studies the MAGCOM algorithm and ICCP algorithm which is commonly used and researched, and the two matching algorithms are simulated. The accuracy of MAGCOM algorithm is relatively low, and can not correct the heading error, although it's simple and has a high computing speed. The heading error of ICCP algorithm can be corrected with a high accuracy, but the initial error can not be too large, otherwise it's easy to get a failed match, and to fall into local optimum.In connection with the shortcomings of the two algorithms, then the new combination of Genetic simulated annealing algorithm and ICCP algorithm is proposed. With Genetic simulated annealing algorithm, we can get the global optimal solution, and then ICCP algorithm is used to improve the matching accuracy. Finally, the simulation of this method is made and obtains a better simulation result.In the end ,in order to carry out ground tests of geomagnetic navigation, this paper mainly works on the geomagnetic field simulation system, including the Helmholtz coil magnetic field uniformity, the source of error, the design of optimal coil parameters, the vertical error and coupling error analysis of three-axis Helmholtz coils, and so on. The research may provide some references for the subsequent researchers in the design and build geomagnetic field simulation system, and some solutions to the potential problems.