摘要
基于不同条件下均匀线性阵列的波束形成输出,分析了阵列尺寸、传声器数目、信号频率、阵列张角等参数对其性能的影响。以非规则轮形阵列为例,阐述了平面阵列性能仿真分析方法及过程,并对矩形网格阵列、十字轴阵列、人字形阵列、圆环阵列、非规则的扇形轮阵列进行了仿真分析及对比,得出了各阵列的阵列模式径向分布函数和最大旁瓣水平随波数的变化关系,探讨了传声器布置形式对阵列性能的影响。在此基础上,开发了通用的阵列性能分析软件,为阵列性能分析、阵列选型和阵列设计及优化提供了有力工具。
Based on the beamforming outputs of the uniform linear array under different conditions,the influence on array performance of the array parameters including the array size,the number of microphones,the frequency of signal,the array opening angle was analyzed.Taking the irregular wheel array for example,the method and process of the simulation analysis for the planar array performance was illustrated.Then,the radial profile of array pattern and the maximum sidelobe levels of typical arrays including regular grid array,cross array,herringbone array,ring array,irregular sector wheel array were simulated and compared.The results showed that both the array parameters and the arrangement layout of microphones have significant effects on the array performance of noise source identification.Finally,the software for analysis of array performance was developed and a powerful tool for the analysis,selection,design and optimum of array performance was obtained.
出处
《传感技术学报》
CAS
CSCD
北大核心
2011年第5期665-670,共6页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金项目(50975296)
牵引动力国家重点实验室开发课题(TPL0903)
关键词
传声器阵列
波束形成
性能分析软件
传声器布置形式
阵列性能
microphones array
beamforming
software for performance analysis
arrangement layout of microphones
array performance
