论阵形畸变的拖曳式线列阵的工作方式的选取问题

On the problem of choices of operational mode for towed line array with distorted shape

阵形畸变是拖曳式线列阵声呐性能偏离理想情况的主要原因。本文讨论在常见阵形畸变方式下,线列阵指向性的计算。给出在各种不同参数下求解椭圆反函数以确定每个基元的精确坐标的方法。同时给出一种递推的公式,用于快速求解畸变阵的阵形。根据对畸变阵指向性与理想指向性的比较,提出拖曳式线列阵的工作方式选取的准则。从而解决了拖曳式线列阵声呐性能预报这一课题。计算机模拟结果与理论分析完全一致。

The distorted shape of array is one of the main reason, which results the performance degeneration from the ideal situation of towed line array. Based on the ordinary array shape distortion, the directivity function of towed line array with distortion is presented in this paper. An algorithm for precisely determining the coordinates of each element by means of the inverse elliptic function is derived. A fast approximation of recursive formula for solving distorted array shape is given. According to the comparison of ideal directivity and directivity of distorted array, a criterion for making decision of operational mode of towed line array is presented. So that the performance prediction problem in towed line array is solved. The results of system simulation in computer shows a good agreement with the theoretical analysis.