Aiming at the problem that the ranging airburst fuze based on the projectile rolling geomagnetic in-duction 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.
维普
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