定距引信地磁感应盲区的自适应辨识与转数补偿  

Adaptive Identification and Turn-counting Compensation Method for Geomagnetic Induction Blind Zone of Airburst Fuze

作　　者：李兆亮 田东辰 李勇 刘秋生 LI Zhaoliang;TIAN Dongchen;LI Yong;LIU Qiusheng(School of Mechatronical Engineering,Beijing Institute of Technology,Beijing 10081,China)

机构地区：[1]北京理工大学机电学院,北京100081

出　　处：《探测与控制学报》2024年第5期8-12,21,共6页Journal of Detection & Control

摘　　要：针对基于弹丸滚转地磁感应的定距空炸引信,当飞行穿越地磁感应盲区时,产生弹丸滚转信息漏检和计转数误差,从而造成较大定距偏差的问题,提出了一种基于弹丸滚转衰减自适应滑窗检测的盲区识别与转数补偿方法。根据建立的四自由度弹道方程、射击诸元,以及弹丸滚转衰减变化,确定地磁盲区转速辨识阈值和自适应滑窗时间;通过实时检测滑窗内计转数变化,识别盲区以及计算补偿盲区转数。以典型小口径防空弹药为例,通过定距空炸引信模拟弹道环境下地磁感应检测电路的感应信号仿真,验证了该方法的有效性,补偿前后计转数相对误差平均降低了40.54%。Aiming at the problem that the ranging airburst fuze based on the projectile rolling geomagnetic induction produce the missing detection of projectile rolling information and turn-counting error when flying through the blind zone of geomagnetic induction,thus causing the large range deviation,a method of blind zone identification and turn compensation based on the projectile rolling attenuation adaptive sliding-window detection was proposed.Based on the established 4-DOF ballistic equation,firing data,and the attenuation variation of the projectile roll,the geomagnetic blind zone rpm discrimination threshold and adaptive sliding window time were determined.By detecting the change of turn in the sliding window in real time,it recognized the blind zone and calculates the number of turns to compensate for the blind zone.Taking a typical small caliber anti-aircraft ammunition as an example,the correctness and feasibility of the study were verified by simulating the induction signals of geomagnetic induction detection circuits in three simulated ballistic environments of ranging airburst fuze,comparing the turn leakage detection and algorithmic compensation for passing blind zone,the validity and correctness of the method were verified,and the relative error in turn-counting number after compensation was reduced by 40.54%on average compared to that before compensation.

关 键 词：地磁场 地磁感应盲区 自适应滑窗 定距空炸引信 

分 类 号：TJ43[兵器科学与技术—火炮、自动武器与弹药工程]