Algorithm for Measuring Attitude Angle of Intelligent Ammunition with Magnetometer/GNSS

Abstract

The rolling attitude of Intelligent ammunition provides the necessary parameter information for the control of flight trajectory. Magnetometer is widely used to measure the attitude angle of intelligent ammunition because of its low cost, high measurement accuracy, no cumulative error, high output frequency and not easy to be interfered by the external environment. However, the simple-guided missile with lower cost will cause a certain angle measurement error due to imperfect parameter information of the missile flight state. In this paper, the angle measurement model of the magnetometer is established, and the angle measurement error under different flight conditions is analyzed. According to the principle of angle measurement error, the algorithm of magnetometer/GNSS combined measurement of missile roll angle is proposed, and the numerical simulation model of the algorithm is established. The numerical simulation results show that the method effectively improves the measurement accuracy of the roll angle of the guided missile.