頻率自適應(yīng)最優(yōu)權(quán)重陣列干涉條紋處理技術(shù)
發(fā)布時間：2018-12-11 17:35
【摘要】：考慮長基線水平陣列波束形成對聲場模態(tài)呈現(xiàn)的濾波特征,建立了一種隨頻率改變?yōu)V波通帶的陣列權(quán)矢量設(shè)計方法�；诤喺ɡ碚�,結(jié)合聲場波束形成特點(diǎn),在分析了常規(guī)波束形成信號LOFAR譜圖干涉條紋的清晰度和條紋結(jié)構(gòu)不同于單水聽器輸出信號條紋現(xiàn)象基礎(chǔ)上,采用線性等式約束的二次優(yōu)化模型,給出了一種頻率自適應(yīng)的最優(yōu)權(quán)重估計。數(shù)值仿真驗(yàn)證和試驗(yàn)數(shù)據(jù)分析表明,利用該方法設(shè)計的最優(yōu)權(quán)重陣列波束處理,可以濾波出SRBR(Surface-Reflected Bottom-Reflected)或N-SRBR(Non-Surface-Reflected Bottom-Reflected)模態(tài)組成的波束形成信號,信號譜圖干涉條紋斜率與理論分析基本一致。
[Abstract]:Considering the filtering characteristics of sound field modes presented by long baseline horizontal array beamforming, an array weight vector design method for filtering passband with frequency change is established. Based on the theory of normal wave and the characteristics of beamforming in sound field, the definition and structure of interference fringes of conventional beamforming signal LOFAR spectrum are analyzed, which is different from the phenomenon of single hydrophone output signal fringe. Using the quadratic optimization model with linear equality constraints, a frequency adaptive optimal weight estimation is presented. Numerical simulation and experimental data analysis show that the beamforming signals composed of SRBR (Surface-Reflected Bottom-Reflected) or N-SRBR (Non-Surface-Reflected Bottom-Reflected) modes can be filtered by using the optimal weight array beam processing designed by this method. The slope of interference fringes in signal spectrum diagram is basically consistent with the theoretical analysis.
【作者單位】： 海軍潛艇學(xué)院;
【基金】：教育部“新世紀(jì)優(yōu)秀人才支持計劃NCET”項(xiàng)目 “國家530專項(xiàng)2015年軍隊(duì)項(xiàng)目”資助
【分類號】：P733.2;TB56
[Abstract]:Considering the filtering characteristics of sound field modes presented by long baseline horizontal array beamforming, an array weight vector design method for filtering passband with frequency change is established. Based on the theory of normal wave and the characteristics of beamforming in sound field, the definition and structure of interference fringes of conventional beamforming signal LOFAR spectrum are analyzed, which is different from the phenomenon of single hydrophone output signal fringe. Using the quadratic optimization model with linear equality constraints, a frequency adaptive optimal weight estimation is presented. Numerical simulation and experimental data analysis show that the beamforming signals composed of SRBR (Surface-Reflected Bottom-Reflected) or N-SRBR (Non-Surface-Reflected Bottom-Reflected) modes can be filtered by using the optimal weight array beam processing designed by this method. The slope of interference fringes in signal spectrum diagram is basically consistent with the theoretical analysis.
【作者單位】： 海軍潛艇學(xué)院;
【基金】：教育部“新世紀(jì)優(yōu)秀人才支持計劃NCET”項(xiàng)目 “國家530專項(xiàng)2015年軍隊(duì)項(xiàng)目”資助
【分類號】：P733.2;TB56
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