现代制造工程
現代製造工程
현대제조공정
MODERN MANUFACTURING ENGINEERING
2014年
11期
47-52
,共6页
波束形成%噪声源识别%性能仿真%应用
波束形成%譟聲源識彆%性能倣真%應用
파속형성%조성원식별%성능방진%응용
beamforming%noise source identification%performance simulation%application
波束形成声源识别技术因具有在中高频的分辨率高的特点而被广泛应用于工程实际中。基于平面波和球面波的假设，以扇形轮阵列为例，进行了延时求和算法的单声源、多声源的声源识别性能仿真，结果表明：自主开发的算法程序是正确的，能够准确地识别单个及多个声源。进行了互功率谱及除自谱的互功率谱算法的声源识别性能仿真对比，结果表明：两种算法均可以准确定位声源，且除自谱的互功率谱算法可以有效地抑制旁瓣，提高了声源识别性能。为进一步验证算法程序的准确性，进行了工程试验，得到单一频率的声源成像图，开发了便于查看任意频带下数据结果的用户界面，同时与基于PULSE获得的声源成像结果进行对比，验证了算法程序的准确性。
波束形成聲源識彆技術因具有在中高頻的分辨率高的特點而被廣汎應用于工程實際中。基于平麵波和毬麵波的假設，以扇形輪陣列為例，進行瞭延時求和算法的單聲源、多聲源的聲源識彆性能倣真，結果錶明：自主開髮的算法程序是正確的，能夠準確地識彆單箇及多箇聲源。進行瞭互功率譜及除自譜的互功率譜算法的聲源識彆性能倣真對比，結果錶明：兩種算法均可以準確定位聲源，且除自譜的互功率譜算法可以有效地抑製徬瓣，提高瞭聲源識彆性能。為進一步驗證算法程序的準確性，進行瞭工程試驗，得到單一頻率的聲源成像圖，開髮瞭便于查看任意頻帶下數據結果的用戶界麵，同時與基于PULSE穫得的聲源成像結果進行對比，驗證瞭算法程序的準確性。
파속형성성원식별기술인구유재중고빈적분변솔고적특점이피엄범응용우공정실제중。기우평면파화구면파적가설，이선형륜진렬위례，진행료연시구화산법적단성원、다성원적성원식별성능방진，결과표명：자주개발적산법정서시정학적，능구준학지식별단개급다개성원。진행료호공솔보급제자보적호공솔보산법적성원식별성능방진대비，결과표명：량충산법균가이준학정위성원，차제자보적호공솔보산법가이유효지억제방판，제고료성원식별성능。위진일보험증산법정서적준학성，진행료공정시험，득도단일빈솔적성원성상도，개발료편우사간임의빈대하수거결과적용호계면，동시여기우PULSE획득적성원성상결과진행대비，험증료산법정서적준학성。
As the sound source identification technology by beamforming had high resolution in medium-high frequency,so it was widely used in engineering practice.Based on the plane wave assumption and the spherical wave assumption and taken the combo array for example,made the performance simulation of simple sound source,multiple sound sources identification by using delay-and-sum algorithm,the results show that the independent designed algorithm program is correct and can identify the single sound source and multiple sound sources.And then,compared the performance simulation between the cross-spectral and the cross-spec-tral with exclusion of autospectra,the results show that two algorithms can identify sound source accurately while the latter algo-rithm can suppress sidelobe effectively and improve the performance of sound source identification.In order to verify the correct-ness of algorithm program,engineering test was made,then the imaging results of single frequence were acquired,meanwhile an interface for the convenience of viewing data was developed.The correctness was verified by the comparison the imaging results by the cross-spectral beamforming method and the ones acquired by PULSE.
