Magnetic survey solution method for flying attitude of high-speed rotating ammunition

The astringency and real-time character of Newton iterative method are connected with initial iterative value in the magnetic survey solution of high-speed rotating ammunition, and the convergence is slow and even divergency appears. The GA was applied to quickly search the approximate solution, and the solution was taken as initial iterative value. Taking high-speed rotating ammunition as an example, the attitude angles were solved using the proposed method, and the algorithm errors such as fixed attitude angle data error, initial fixed parameters error and magnetic measured data error were analyzed. The results show that the GA-Newton iterative method can effectively improve the convergence and rapidity. When a given attitude angle error is less than 5° and magnetic data error is less than 500nT or initial geomagnetic component error is less than 1000 nT, the attitude angle error is less than 3°, and the algorithm has higher precision.