Terminal Trajectory and Impact Point Localization of Subsonic Landing Unexploded Projectiles

For the problem of locating unexploded projectiles, the acoustic characteristics of the terminal trajectory of subsonic landing projectiles were analyzed, and a method and mathematical model were established to locate their terminal trajectory and landing point coordinates using the aerodynamic noise of projectile flight. This method is based on two or more microphone arrays and automatic detection algorithms for acoustic endpoints to segment and obtain acoustic data at the end of the trajectory. The MUSIC algorithm is used to estimate the trajectory noise and determine the target orientation. The dual array directional intersection locating principle and moving target correction algorithm are used to obtain the target trajectory and landing point. The experimental results show that the technology proposed in the article can be used for locating the unexploded projectiles. Compared with other acoustic methods, the advantages of this method are low testing equipment cost, convenient deployment, and locating accuracy that meets the needs of unexploded projectiles recovery and destruction.