航空反潜中的吊放声纳系统仿真

Simulation for dipping sonar system in air anti-submarine

以单机反潜作战过程为典型实例,研究了仿真系统功能需求及总体结构;建立了声纳发现判决方程、目标回波特性模型;在视频和音频两个方面,采用软件模拟,着重模拟吊放声纳终端的实际工作情况。提出利用随机抽取法实现杂波、噪声的视频信号模拟;实现了基于水声资料库的音频信号逼真、实时合成和回放;采用了空间矩阵和多媒体技术实现音频播放和视频显示的同步。使用表明,建立逼真的航空反潜作战仿真环境,对突破实装训练的局限性是必要和有益的。

In the context of single-helicopter anti-submarine warfare, the archit ectural and functional requirements of the simulation system were explored. Furt hermore, identification equations of sonar searching, and characteristic models of reflection intensity and echo strength were discussed. For the video and aud io signal, the terminal behaviors of the dipping sonar system were especially co ncerned and well simulated, and mainly implemented with software technology. Ran dom extraction method was adopted to simulate the target reflections and backgro und clutter of the video in display terminals. By creating an underwater acousti cal signal database, the real-time audio signals was synthesized and retrieved effectively with high fidelity. Based on space-matrix algorithm and advanced mu ltimedia technology, the video and audio streams were displayed in a synchronize d way. The successful employment of this simulator shows that, constituting a si mulated air anti-submarine circumstance is necessary and helpful to break throu gh training limitation of actual combat equipment.