基于垂直声强流的水中目标深度分类方法

Underwater Target Depth Classification Method Based on Vertical Acoustic Intensity Flux

现有的基于声场干涉结构特征的目标深度分类方法的频率适用范围有限,仅适用于目标线谱频率激发前2阶简正波的情况。针对上述问题,该文提出基于匹配场处理的目标深度分类算法,该算法将垂直复声强无功分量作为匹配量进行目标深度的匹配估计,利用目标深度的粗略估计结果辅助进行目标深度的二元分类。算法适用于线谱频率激发前3阶简正波的情况,有效拓展了算法的频率适用范围。仿真结果验证了算法的可行性和稳健性。该文分析了环境失配情况对算法性能的影响。所提算法具有较高的准确性和稳健性。

The existing target depth classification methods based on acoustic interference structure characteristics have a limited frequency range,and are only suitable for the case where target frequency can excite first two modes.Aiming to this problem,a novel target depth classification algorithm based on matching field processing is proposed in this paper.The proposed algorithm uses the reactive component of vertical complex acoustic intensity as matching variable to estimate target depth.The rough estimation results of target depth can be used to assist the binary classification of target depth.This method is suitable for the case where target frequency can excite first three modes,so as to expand the frequency range of the algorithm.The feasibility and robustness of the algorithm are verified by simulation results.The influence of mismatched sea environmental parameters on algorithm performance are also analyzed.The proposed algorithm has high accuracy and robustness.