被动声纳目标建模及实时仿真

摘要

通过分析舰船辐射噪声的水声特性,提出了工程上应用的舰船辐射噪声连续谱和线谱的数学模型,仿真得到了期望的舰船辐射噪声信号.利用通用的硬件资源和底层控制软件,开发了实时仿真软件,实时输出舰船辐射噪声的模拟信号,经有源信号衰减板衰减为微弱模拟信号.实验证明,得到的微弱模拟信号很好地再现了典型舰船辐射噪声的水声特性,作为被动声呐实时仿真的信号源,可用于半实物仿真及系统测试.%The hydroacoustic characteristic of ship-radiated noise was analyzed, then ship's low frequency noise continuous spectrum models and the line spectrum models were constructed and the expected signals of ship-radiated noise were created by simulations. Real-time simulation software was developed based on common hardware and bottom control software, and analog signal of ship-radiated noise was output simultaneously. The signals went through the source signal attenuator and then weak signals were produced. Experiments show that the weak signals can well simulate the hydroacoustic characteristic of classic ship-radiated noise. As the signal resource of passive sonar in the real time simulation, it can be applied to hardware-in-loop simulations and system tests.