利用拖线阵运动特性的阵形估计方法

有效估计阵形是提高机动条件下拖线阵声呐探测性能的关键,流体力学类阵形估计方法稳定性和可靠性欠佳,导致其难以应用于工程实际,该文针对此问题提出一种基于拖线阵运动特性的阵形估计方法。利用稳态振荡响应公式计算拖船回转机动时拖线阵稳态阵形特性,将转向机动过程中阵上各点运动状态划分为若干阶段,进而依据偏微分方程特征线理论计算各阶段的分界时刻,探究阵上相邻两点的沿阵切线方向差变化规律,最后通过计算当前阵上各点的沿阵方向实现阵形估计。计算机仿真和海上实验数据验证表明算法可行且有效,与传统的流体力学类阵形估计方法相比具有更高的稳定性和更好的工程应用前景。

Towed linear array shape estimation using array motion characteristics

Effective estimation of array shape is the key to improve the detection performance of towed linear array sonar under maneuvering conditions. Because of the poor stability and reliability of the array shape estimation method based on fluid mechanics, it is difficult to apply it to engineering practice. To solve this problem, a new method of array shape estimation based on the motion characteristics of towed linear array is proposed in this paper. The steady-state shape characteristics of towed linear array on turning maneuvers are calculated by using the steady-state oscillation response formula. The motion state of each point in the array during course-change maneuver is divided into several stages. Then the boundary time of each stage is calculated according to the characteristic line of partial differential equation. The variation law of tangent direction difference between two adjacent points on the array is explored. By calculating the tangential direction of each point on the array, the array shape estimation is finally implemented real-timely. It is showed through the computer simulation and sea trial data that the proposed algorithm is feasible and effective. Moreover, it has better stability and application foreground compared with the traditional array shape estimation method based on fluid mechanics.