弹道修正引信中的地磁信号及其抗干扰研究

Research on Geomagnetic Signal and Its Anti-interference for Fuze of Trajectory Correction Projectile

为了利用地磁传感器获取弹道修正弹的飞行姿态角,分析了磁场高度、地磁异常、弹体磁场干扰和系统噪声及其对地磁信号的影响情况,提出了相应的抗干扰措施.介绍了基于地磁探测的弹丸滚转角辨识原理,进行了滚转角辨识系统静态与动态试验.结果表明,利用弹载地磁传感器并结合抗干扰措施所获得的地磁信号稳定可靠,可为弹丸飞行姿态角探测所利用,实验室条件下滚转角辨识精度在5°以内.

In order to get flight attitude angles of trajectory correction projectile by geomagnetic sensors, geomagnetic field altitude and its abnormal distribution, the interference of magnetic field of the projectile body and the system noise were analyzed as well as the effect of them on geomagnetic signal. The anti-interference measures were presented. The principle of roll angle determination for projectile based on geomagnetism detection was introduced, the static and dynamic experiments for roll angle determination system were carried out. The results indicate that the geomagnetic signal processed by the determination system on projectile is stable and reliable, and it can he utilized for attitude angles detection of projectile, and the precision of roll angle can be controlled in the range of 5° in laboratory.