System and method for estimating projectile trajectory and source location

摘要

Systems and methods for estimating projectile trajectory and projectile source location are provided. A method for estimating location information associated with a supersonic projectile propelled from a source includes recording sound at a first location using a single microphone during travel of the supersonic projectile to produce an acoustic recording. The method further includes estimating a miss distance between the first location and a trajectory of the projectile based on the shockwave length. Locating a projectile source includes concurrently recording sound at multiple locations and generating data sets associated with the locations, each of the plurality of data sets including a miss distance, a range, a time of arrival of a muzzle blast from the source, and a time of arrival of a shockwave produced by the projectile. Additionally, the method includes calculating an approximate location of the source at each of the locations based on the data sets.

主权项

1. A method for estimating location information associated with a supersonic projectile propelled from a source, the method comprising:
recording sound at a first location using a single microphone during travel of the supersonic projectile to produce an acoustic recording; and estimating a miss distance (b) between the first location and a trajectory of the supersonic projectile based on a length of a shockwave generated by the supersonic projectile (shockwave length), wherein the estimating comprises identifying the shockwave length based on the acoustic recording and determining the miss distance based on the shockwave length and a plurality of projectile characteristics, and wherein the determining of the miss distance comprises performing one of:
selecting the miss distance based on a table of predefined miss distance values as a function of a period of the shockwave based on the acoustic recording, orevaluating:b=l⁡(TcdM⁡(1.82))4⁢(M2-1)3/2 where l is the projectile length, d is the projectile diameter, T is the shockwave length, c is the speed of sound, and M is the Mach number associated with the projectile.