本文選題：深�；祉� + 統(tǒng)計(jì)特性　； 參考：《哈爾濱工程大學(xué)》2016年碩士論文

【摘要】：聲納是人類(lèi)認(rèn)知海洋,開(kāi)發(fā)海洋的重要工具,而主動(dòng)聲納系統(tǒng)往往受到海洋混響干擾,嚴(yán)重影響了聲納設(shè)備的工作性能。海洋混響信號(hào)的時(shí)域波形是主動(dòng)聲納抗混響技術(shù)研究的基礎(chǔ),對(duì)海洋混響進(jìn)行時(shí)域波形預(yù)報(bào),可以為主動(dòng)聲吶抗混響研究工作者提供混響數(shù)據(jù)支持。隨著人類(lèi)對(duì)海洋的開(kāi)發(fā)逐漸由淺海擴(kuò)展到深海,深海環(huán)境下的海洋混響抗干擾研究也就成為了聲納工作者目前非常關(guān)心的問(wèn)題。而國(guó)內(nèi)對(duì)深�；祉懙难芯块_(kāi)展較少,鑒于此,本文開(kāi)展了深海環(huán)境下的混響時(shí)域波形建模預(yù)報(bào)研究。在充分了解海洋混響形成過(guò)程的前提下,本文首先對(duì)射線聲學(xué)聲傳播理論和海洋聲散射基本理論進(jìn)行了探討研究,并以此為基礎(chǔ),結(jié)合水聲信號(hào)傳播建模理論,開(kāi)展了對(duì)深�；祉憰r(shí)域波形預(yù)報(bào)建模理論的研究。針對(duì)收發(fā)合置和收發(fā)分置聲納系統(tǒng)幾何配置的不同,本文對(duì)收發(fā)合置混響和收發(fā)分置混響分別進(jìn)行建模研究,仿真得到了發(fā)射CW脈沖和LFM線性調(diào)頻信號(hào)下的深�；祉懖ㄐ�。為了得到完整的深�；祉憰r(shí)域波形,本文分別對(duì)三種不同類(lèi)型的混響進(jìn)行時(shí)域波形建模仿真,將預(yù)報(bào)得到的三類(lèi)混響信號(hào)進(jìn)行線性迭加得到最終的深�；祉憰r(shí)域波形。其次本文對(duì)預(yù)報(bào)得到的各類(lèi)混響時(shí)域波形和完整深海混響時(shí)域波形進(jìn)行了統(tǒng)計(jì)特性分析,并與理論值進(jìn)行了對(duì)比。同時(shí),本文也對(duì)海上混響試驗(yàn)數(shù)據(jù)進(jìn)行了混響統(tǒng)計(jì)特性和時(shí)空頻垂直相關(guān)特性分析,并對(duì)試驗(yàn)數(shù)據(jù)處理結(jié)果進(jìn)行了簡(jiǎn)要討論。最后本文在LabVIEW虛擬儀器平臺(tái)下,結(jié)合Fortran語(yǔ)言和Matlab語(yǔ)言,進(jìn)行了混響時(shí)域波形預(yù)報(bào)軟件開(kāi)發(fā)。該軟件能夠預(yù)報(bào)收發(fā)合置和收發(fā)分置兩種情況下的海面混響、海底混響和體積混響以及總的海洋混響時(shí)域波形,并能實(shí)現(xiàn)對(duì)預(yù)報(bào)波形的統(tǒng)計(jì)特性分析。軟件通過(guò)將參數(shù)輸入界面獨(dú)立出來(lái),簡(jiǎn)化了混響時(shí)域波形預(yù)報(bào)界面的復(fù)雜度,使得界面更加易用美觀。
[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.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：P733.2;TP311.52

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本文編號(hào)：2048096