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Acoustic hit indicator

机译:声击指示器

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摘要

An improved acoustic target is considered. Acoustic targets estimate the hit coordinates of a supersonic projectile using the time of arrival (TOA) of the supersonic shock wave at several acoustic transducers located in the vicinity of the target. An improved target allows oblique hits, likely in firing practices involving roaming infantry and armor. Four trajectory parameters are estimated: two hit coordinates (x,h) on a virtual, vertical, target plane; horizontal angle of incidence; projectile velocity. Explicit expressions are provided of the expected TOA measurements and their derivatives with respect to the estimated parameters. The expressions simplify a least-squares iterative algorithm and accelerate its convergence. Expected error contour maps are provided
机译:考虑改进的声学目标。声目标使用超声冲击波在目标附近的多个声换能器上的到达时间(TOA)估算超声弹的命中坐标。改进的目标可以使斜射命中,可能是在步兵和装甲漫游的射击练习中。估计了四个轨迹参数:在虚拟垂直目标平面上的两个命中坐标(x,h);水平入射角;弹丸速度。给出了预期的TOA测量值及其相对于估计参数的导数的明确表达式。该表达式简化了最小二乘迭代算法,并加快了收敛速度。提供了预期的误差轮廓图

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