尾流中悬浮拦截弹环境噪声特性研究

Research on Ambient Noise Characteristics of Suspension Interception Missile

摘要:

尾流自导鱼雷对水面舰艇构成严重威胁。 为了把悬浮拦截弹被动拦截方式从非尾流区域扩展到尾流区，拦截尾流自导鱼雷，需要研究尾流内噪声特点，分析出拦截弹在尾流区的环境噪声特性。 基于悬浮拦截弹对不同吨位舰船尾流噪声进行研究，结合高阶累积量从概率论的角度出发，计算了尾流噪声的斜度和峰度随尾流年龄的变化规律；噪声斜度判断噪声是否满足对称分布，峰度判断噪声是否为高斯信号。 将实测数据与仿真数据峰度和斜度进行比对，得出结论：舰船尾流噪声环境可以近似看作是高斯信号，服从对称分布，且该分布特性与舰船吨位不相关。

关键词:尾流;斜度;峰度;高斯信号

Abstract:

Wake?guided torpedo poses a serious threat to surface ships． In order to extend the passive interception mode of suspension interception missile from the non?wake region to the wake region and intercept wake homing torpedo， characteristics of the noise in the wake need to be studied and the environmental noise characteristics of the interception projectile in the wake area need to be analyzed． In this paper， the noise of the ship wakes in different tonnage ships is studied based on the suspension interceptor missile． Based on the theory of probability combining with higher order cumulants， this paper calculates the variation rule of wake flow noise’s skewness and kurtosis varying with wake age； noise skewness is to determine whether the noise meets symmetrical distribution， and noise kurtosis to determine whether the noise is Gauss signal． From comparison of the kurtosis and skewness of measured data with those of simulation data， a conclusion is draw that the noise environment of ship wake can be approximated as the Gauss signal， which follows the symmetrical distribution and this distribution is not related to the tonnage of ship．

Key words:wake flow; skewness; kurtosis; Gaussian signal