目标机动时刻估计的声特征变化显著性检验方法

Target maneuver onset time estimation via significance test of acoustic feature variation

通过实时检测目标辐射噪声中的特征变化实现对目标机动时刻的估计。通过实验数据的统计分析,指出在一种平稳航行状态下目标辐射噪声特征的估计值符合正态分布,据此提出目标特征变化的显著性检验方法,实现目标机动时刻的在线估计。定义不同特征对目标运动状态的区分度,利用区分度最大的特征进行目标机动时刻估计,以提高算法效率。实验结果表明,该方法可以有效减少目标机动时刻的估计滞后时间。

An acoustic feature change detecting based method is proposed to estimate the target maneuver onset time. From the statistical analysis of many acoustic features of different targets, a certain estimated feature value in a single motion state conforms to the approximately normal distribution. Based on the normal distribution, an online method is proposed to estimate the target maneuver onset time by testing the significance of acoustic feature variation. The acoustic feature variation index is defined to select the most sensitive feature to the change of target motion state. Then the feature can be used to improve the efficiency of the method. Experiment results show that the proposed meth- od is more rapid to estimate the maneuver onset time after the target maneuver occurs.