深海混响时域波形预报及数据分析

发布时间：2018-06-21 09:32

本文选题：深海混响 + 统计特性　；参考：《哈尔滨工程大学》2016年硕士论文

【摘要】：声纳是人类认知海洋,开发海洋的重要工具,而主动声纳系统往往受到海洋混响干扰,严重影响了声纳设备的工作性能。海洋混响信号的时域波形是主动声纳抗混响技术研究的基础,对海洋混响进行时域波形预报,可以为主动声呐抗混响研究工作者提供混响数据支持。随着人类对海洋的开发逐渐由浅海扩展到深海,深海环境下的海洋混响抗干扰研究也就成为了声纳工作者目前非常关心的问题。而国内对深海混响的研究开展较少,鉴于此,本文开展了深海环境下的混响时域波形建模预报研究。在充分了解海洋混响形成过程的前提下,本文首先对射线声学声传播理论和海洋声散射基本理论进行了探讨研究,并以此为基础,结合水声信号传播建模理论,开展了对深海混响时域波形预报建模理论的研究。针对收发合置和收发分置声纳系统几何配置的不同,本文对收发合置混响和收发分置混响分别进行建模研究,仿真得到了发射CW脉冲和LFM线性调频信号下的深海混响波形。为了得到完整的深海混响时域波形,本文分别对三种不同类型的混响进行时域波形建模仿真,将预报得到的三类混响信号进行线性迭加得到最终的深海混响时域波形。其次本文对预报得到的各类混响时域波形和完整深海混响时域波形进行了统计特性分析,并与理论值进行了对比。同时,本文也对海上混响试验数据进行了混响统计特性和时空频垂直相关特性分析,并对试验数据处理结果进行了简要讨论。最后本文在LabVIEW虚拟仪器平台下,结合Fortran语言和Matlab语言,进行了混响时域波形预报软件开发。该软件能够预报收发合置和收发分置两种情况下的海面混响、海底混响和体积混响以及总的海洋混响时域波形,并能实现对预报波形的统计特性分析。软件通过将参数输入界面独立出来,简化了混响时域波形预报界面的复杂度,使得界面更加易用美观。
[Abstract]:Sonar is an important tool for human beings to understand and develop the ocean. The active sonar system is often disturbed by ocean reverberation, which seriously affects the performance of sonar equipment. The time-domain waveform of marine reverberation signal is the basis of the research on anti-reverberation technology of active sonar. The prediction of time-domain waveform of marine reverberation can provide reverberation data support for the researchers of anti-reverberation of active sonar. With the development of the ocean gradually expanded from shallow to deep sea, the anti-jamming research of marine reverberation in deep-sea environment has become a very concerned issue for sonar workers at present. However, there are few researches on deep-sea reverberation in China. In view of this, the modeling and prediction of reverberation time-domain waveform in deep-sea environment is studied in this paper. On the premise of fully understanding the formation process of marine reverberation, the theory of ray acoustic sound propagation and the basic theory of ocean acoustic scattering are studied in this paper, and based on this theory, the modeling theory of underwater acoustic signal propagation is combined. The modeling theory of time domain waveform prediction for deep sea reverberation is studied. Aiming at the difference of geometric configuration between transceiver and transceiver combined sonar system, the modeling of transceiver and transceiver mixed reverberation is carried out in this paper, and the deep-sea reverberation waveforms of CW pulse and LFM LFM signal are simulated. In order to obtain the complete time-domain waveform of deep-sea reverberation, three different types of reverberations are modeled and simulated in this paper. The predicted three types of reverberation signals are linearly superimposed to obtain the final time-domain waveform of deep-sea reverberation. Secondly, the statistical characteristics of all kinds of reverberation time domain waveforms and complete deep-sea reverberation time domain waveforms are analyzed and compared with the theoretical values. At the same time, the reverberation statistical characteristics and time-space frequency vertical correlation characteristics of sea reverberation test data are analyzed, and the processing results of test data are briefly discussed. Finally, in the LabVIEW virtual instrument platform, combined with Fortran language and Matlab language, the reverberation time domain waveform prediction software is developed. The software can predict the sea surface reverberation, submarine reverberation and volume reverberation, and total ocean reverberation in time domain under both transceiver and transceiver separation, and can realize the statistical analysis of the predicted waveforms. The software simplifies the complexity of reverberation time domain waveform prediction interface and makes the interface more easy to use and beautiful.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P733.2;TP311.52

【参考文献】