基于非规则网格的随机稀疏声阵列搭建方法
发布时间：2018-11-23 08:39
【摘要】：为解决多源运动声场测量中声阵列的高效生成和搭建依据问题,提出以非规则网格同轴圆环阵为基础结构形式,制定非规则网格的规划方案,采用均一概率密度分布,将阵列面等面积分区,网格点等量分配,构建了以分区数和网格点数为维度的基础阵数学模型,利用此模型和推导的运动声场随机声阵列结构滤波条件,经伪随机生成,随机筛选出阵列传声器位置,形成候选阵,进一步,由提出的目标阵性能评价参数和原则,从候选阵中生成目标阵。经模拟仿真和实车实验,验证了随机阵生成过程的高效性和性能的稳健性。该方法将复杂冗长的阵列结构随机生成过程转化为传声器位置的矩阵优化运算,大幅度提高了阵列生成速度。同时,给出了测量多源运动声场的随机稀疏声阵列搭建原则。
[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.
【作者单位】： 青岛理工大学机械工程学院;青岛理工大学工业流体节能与污染控制教育部重点实验室;
【基金】：国家自然科学基金(61401245,61671262) 泰山学者工程专项经费资助项目
【分类号】：U491.91
，
本文编号：2350934
[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.
【作者单位】： 青岛理工大学机械工程学院;青岛理工大学工业流体节能与污染控制教育部重点实验室;
【基金】：国家自然科学基金(61401245,61671262) 泰山学者工程专项经费资助项目
【分类号】：U491.91
，
本文编号：2350934
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