Based On The Gps And Geomagnetic Combination Of The Projectile Attitude Solution Method Study

Two-dimensional trajectory correction bomb is a focus of smart munitions research. With the department of geomagnetism detection technology and GPS positioning technology, these two techniques simultaneously applied to the two-dimensional trajectory correction bomb is a worthy subject of study. It's difficult to calculate projectile attitude angle of Two-dimensional trajectory correction bomb research.The contents of this paper is based on two technologies to find the method of projectile attitude angle calculation.Geomagnetic field around the world, relatively stable, and has a kind of regularity. GPS can provide the position, velocity and time information for a carrier all over the world. Research is based on GPS/MR to find solution method of projectile attitude angle. According to GPS receiver receive the projectile position and velocity information to determine ballistic trajectory obliquity and inclination angle. Using of magnetoresistive sensors detect the magnetic on three-axis of the projectile, and complete real-time processing of the magnetic signal within the required time and the accuracy. Finally by the attitude angle matrix to calculate the roll angle, in order to control the projectile attitude.This paper studies the solution method of GPS/MR to calculate attitude angle of the projectile, and design the geomagnetic acquisition system hardware circuit in composite systems, and design the interface circuit between CNS50 module and the host processor. Finally using MATLAB to simulate projectile attitude angle by GPS/MR calculation method and external ballistics theory, and obtained more satisfactory results. The results indicate that the method is feasible.