空中目标辐射噪声水下传播特性及检测技术研究

The Radiated noise of the air target can be received and detected by the underwater acoustic receiving array at a certain depth during its propagation from air to sea. This provides conditions for the detection, warning, tracking and confrontation of the air target from underwater. This project is based on a preliminary study of the existing technologies as propagation and detection of the sound source in air and the radiate noise of the anti-submarine helicopter and its underwater sound field. Based on the measured data, the project deeply researches on the main features, the change law and the detection technology of the radiated noise of the air target by means of the combination of theoretical analyses, modeling and simulation, model validation and modification. The project also provides a theoretical basis and a technical foundation for related applications..The main research contents: the main feature differences of the radiated noise of the air target, the surface target and the underwater target; the main characteristic distributions and the change law of the radiate noise of the air target in vertical direction and in level direction at a certain depth; the research on the algorithms as the classification pre-position detection, the fusion detection and the adaptive high-order statistics detection, on the effect comparison and on the design of detection; the acquisition of the underwater data propagation of the air target's radiate noise and the validation and modification of related models and algorithms based on the measured data.

空中目标辐射噪声通过空气-海水界面在海洋环境中传播时，可被一定深度的水声接收阵接收、检测，为实现水下对空中目标的探测、预警、定位、跟踪、对抗等提供了条件。本项目在已开展空中声源水下传播与检测技术、反潜直升机辐射噪声及其产生的水下声场技术等初步研究的基础上，将以实测数据为基础，通过理论分析、建模仿真、模型验证与模型修正相结合的方法，深入研究空中目标辐射噪声在水下传播的主要特征与变化规律、检测技术，为相关应用提供理论依据和技术基础。.主要研究内容：空中目标与水面目标、水下目标的辐射噪声在海洋环境传播过程中，其主要特征区别；空中目标辐射噪声在海洋深度方向、一定深度水平方向的主要特征分布及变化规律；空中目标辐射噪声特征的分类置前检测、融合检测、自适应高阶统计量检测等算法研究，检测效果比较、检测器设计；空中目标辐射噪声水下传播数据的采集，基于实测数据的相关模型、算法的验证与修正。

本项目主要对空中目标辐射噪声水下传播特性及检测技术进行了研究。主要研究内容为：.1.采集了不同型号空中目标在不同工作状态下的辐射噪声数据，研究了空中目标与水面目标、水下目标的辐射噪声主要特征差异；.2.采集了空中目标水下传播数据，研究了其主要特征在深度方向和水平方向的传播特点和变化规律；.3.研究了在一定深度对空中目标辐射噪特征信号进行检测的技术，实现了空中目标辐射噪声主要特征的高阶统计量检测等算法，并对检测进行了分析比较；.该项目的研究，为实现水下对空中目标的探测、预警、定位、跟踪、对抗，提高潜艇对空中反潜机的对抗能力等提供了数据支撑、理论依据、奠定了技术基础。