Accurate bearing-time recordings play a crucial role in hydroacoustic target motion analysis and situation estimation. The target bearing estimated by vector hydrophone in the interference environment suffers from poor display and low signal-to-noise ratio. To solve this problem, a two-stage bearing-only motion analysis method is proposed. Firstly, the bearing peak information and bearing dispersion are extracted for each sampling moment of the bearing-time recording. Custom constraint regions and adaptive parameters are then set based on this information. The order truncate average algorithm is improved to enhance the quality of the low-quality bearing-time recording map. Secondly, a bearing-only target motion model is established based on the bearing-time recording distribution features, and a bearing-time recording trust interval is constructed. Then a modified pseudo-linear estimation algorithm is proposed to solve the target motion situation information, including target abeam time, target abeam bearing, target course, velocity-to-initial-distance ratio, and so forth. Finally, by comparing the solved values of the sea trial data with the automatic identification system calculation results, the enhancement effect of the target bearing-time recording map is significant and the solving error of the target motion elements meets the needs of engineering applications.

中文翻译：

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基于低质量方位时间记录图的目标仅方位运动分析

准确的方位时间记录在水声目标运动分析和态势估计中发挥着至关重要的作用。矢量水听器在干扰环境下估计的目标方位存在显示效果差、信噪比低的问题。为了解决这个问题，提出了一种两级纯轴承运动分析方法。首先，针对方位时间记录的每个采样时刻提取方位峰值信息和方位分散。然后根据此信息设置自定义约束区域和自适应参数。改进阶次截断平均算法，提高低质量方位时间记录图的质量。其次，基于方位时间记录分布特征建立仅方位目标运动模型，并构造方位时间记录信任区间。然后提出一种改进的伪线性估计算法来求解目标运动态势信息，包括目标平射时间、目标平射方位、目标航向、速度与初始距离比等。最后，通过海试数据求解值与自动识别系统计算结果的对比，目标方位时间记录图增强效果显着，目标运动单元求解误差满足工程应用的需要。