發(fā)布時間：2018-11-23 08:39

【摘要】：為解決多源運動聲場測量中聲陣列的高效生成和搭建依據(jù)問題,提出以非規(guī)則網(wǎng)格同軸圓環(huán)陣為基礎(chǔ)結(jié)構(gòu)形式,制定非規(guī)則網(wǎng)格的規(guī)劃方案,采用均一概率密度分布,將陣列面等面積分區(qū),網(wǎng)格點等量分配,構(gòu)建了以分區(qū)數(shù)和網(wǎng)格點數(shù)為維度的基礎(chǔ)陣數(shù)學(xué)模型,利用此模型和推導(dǎo)的運動聲場隨機聲陣列結(jié)構(gòu)濾波條件,經(jīng)偽隨機生成,隨機篩選出陣列傳聲器位置,形成候選陣,進一步,由提出的目標(biāo)陣性能評價參數(shù)和原則,從候選陣中生成目標(biāo)陣。經(jīng)模擬仿真和實車實驗,驗證了隨機陣生成過程的高效性和性能的穩(wěn)健性。該方法將復(fù)雜冗長的陣列結(jié)構(gòu)隨機生成過程轉(zhuǎn)化為傳聲器位置的矩陣優(yōu)化運算,大幅度提高了陣列生成速度。同時,給出了測量多源運動聲場的隨機稀疏聲陣列搭建原則。
[Abstract]:In order to solve the problem of efficient generation and construction of acoustic array in the measurement of multi-source moving sound field, an irregular grid planning scheme based on irregular grid coaxial ring array is proposed, and the uniform probability density distribution is adopted. The basic matrix mathematical model with the dimension of partition number and grid number is constructed by dividing the area of array surface and the equal quantity of grid points. By using this model and the filter condition of the random acoustic array structure of moving sound field, the pseudorandom is generated by pseudorandom. The position of array microphone is selected randomly to form a candidate array. Furthermore, the target matrix is generated from the proposed target array performance evaluation parameters and principles. The high efficiency and robustness of the random matrix generation process are verified by simulation and real vehicle experiments. In this method, the complex and lengthy random generation process of array structure is transformed into matrix optimization of microphone position, which greatly improves the speed of array generation. At the same time, the principle of random sparse acoustic array for measuring the moving sound field of multiple sources is presented.
【作者單位】： 青島理工大學(xué)機械工程學(xué)院;青島理工大學(xué)工業(yè)流體節(jié)能與污染控制教育部重點實驗室;
【基金】：國家自然科學(xué)基金(61401245,61671262) 泰山學(xué)者工程專項經(jīng)費資助項目
【分類號】：U491.91
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本文編號：2350934