本文選題：深海混響 + 統(tǒng)計特性��； 參考：《哈爾濱工程大學(xué)》2016年碩士論文

【摘要】：聲納是人類認(rèn)知海洋,開發(fā)海洋的重要工具,而主動聲納系統(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。海洋混響信號的時域波形是主動聲納抗混響技術(shù)研究的基礎(chǔ),對海洋混響進(jìn)行時域波形預(yù)報,可以為主動聲吶抗混響研究工作者提供混響數(shù)據(jù)支持。隨著人類對海洋的開發(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)心的問題。而國內(nèi)對深海混響的研究開展較少,鑒于此,本文開展了深海環(huán)境下的混響時域波形建模預(yù)報研究。在充分了解海洋混響形成過程的前提下,本文首先對射線聲學(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)合水聲信號傳播建模理論,開展了對深�；祉憰r域波形預(yù)報建模理論的研究。針對收發(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)頻信號下的深海混響波形。為了得到完整的深�；祉憰r域波形,本文分別對三種不同類型的混響進(jìn)行時域波形建模仿真,將預(yù)報得到的三類混響信號進(jìn)行線性迭加得到最終的深海混響時域波形。其次本文對預(yù)報得到的各類混響時域波形和完整深�；祉憰r域波形進(jìn)行了統(tǒng)計特性分析,并與理論值進(jìn)行了對比。同時,本文也對海上混響試驗(yàn)數(shù)據(jù)進(jìn)行了混響統(tǒng)計特性和時空頻垂直相關(guān)特性分析,并對試驗(yàn)數(shù)據(jù)處理結(jié)果進(jìn)行了簡要討論。最后本文在LabVIEW虛擬儀器平臺下,結(jié)合Fortran語言和Matlab語言,進(jìn)行了混響時域波形預(yù)報軟件開發(fā)。該軟件能夠預(yù)報收發(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域波形,并能實(shí)現(xiàn)對預(yù)報波形的統(tǒng)計特性分析。軟件通過將參數(shù)輸入界面獨(dú)立出來,簡化了混響時域波形預(yù)報界面的復(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)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：P733.2;TP311.52

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本文編號：2048096