Research And Application Of Geomagnetic Navigation Based On Magnetoresistive Sensor—interference Research And Correction Of Geomagnetic Signals

Geomagnetic navigation is a hot research direction in the field of navigation.The principle is that the flying body posture information of the carrier is obtained by using the geomagnetic signal measured by the magnetic sensor on the carrier,The Rolling angle is one of the most important measurement parameter,and its measurement precision determines the precision of the projectile striking target.This paper is formed of three parts.1?On the basis of the theory of rolling angle,this paper designs the orientation detection system based on the magnetic resistance sensor.This system can effectively measure the geomagnetic signal on the carrier:Bbx,Bby.The rolling angle of the flying body can be solved by the two geomagnetic signals.2?The two measured geomagnetic signal Bbx,Bby are studied on interference and corrected by algorithm,the phase correction algorithm is proposed based on the ellipse compensation algorithm,It is proved that the algorithm is effective to eliminate the interference,Through the simulation test data and ball firing data.It is important to improve the measurement accuracy and the attitude parameters of the geomagnetic signal.3?The photoelectric decoder is used to obtain the true rotation angle of the carrier.The software is written by MATLAB GUI.4?We share the geomagnetic signal data on network and put the data of measurement system in the database,in order to achieve the data CRUD.