基于二维压差式矢量水听器源估计误差分析  

Quantitative Analysis of Error of Estimated Bearing of Acoustic Source Location with TDPG(Two-Dimensional Pressure-Gradient) Vector Hydrophone

作　　者：程彬彬[1] 杨士莪 

机构地区：[1]西北工业大学声学工程研究所,陕西西安710072

出　　处：《西北工业大学学报》2006年第6期800-803,共4页Journal of Northwestern Polytechnical University

摘　　要：由于组成二维压差式矢量水听器的4阵元间的幅频和相频响应不一致造成了其运用声能流进行方位估计时会产生误差,而这一误差大小对二维压差式矢量水听器的制作和实际工程有很重要的意义。因此将针对二维压差式矢量水听器声能流方位估计误差进行了推导和分析。文章主要分为以下4个部分:①二维压差式矢量水听器的结构;②声能流方位估计的原理;③分析了由于组成二维压差式矢量水听器的各声压水听器不一致导致的方位估计误差;④对信号方位角度为30°时,在不同信噪比条件,4声压水听器不一致情况进行了方位估计误差仿真。文中给出了仿真结果。仿真结果表明在相同信噪比条件下,由于相位偏差对压差式矢量水听器方位估计产生误差远大于由于幅度偏差而产生的方位估计误差。To our best knowledge, there is no paper in the open literature dealing with the quantitative determination of the error of the estimated bearing of acoustic source location with TDPG vector hydrophone. Yet this quantitative information is essential to the proper manufacture and application of TDPG vector hydrophone. So we present our research results on such quantitative determination. In the full paper, we use the sound energy flow bearing estimation method to estimate respectively the acoustic source location errors due to the inconsistency of amplitude frequency responses and that of phase frequency responses among the four pressure hydrophones of a TDPG vector hydrophone. In this abstract, we just add some pertinent remarks to listing the four topics of explanation： （1） the structure of TDPG vector hydrophone; （2） the sound energy flow bearing estimation principles using sound pressure and particle vibration velocity; （3） the analysis of errors due to the inconsistency of responses among the four pressure hydrophones; （4） the simulation of errors at the signal bearing angle of 30° and at various signal- to-noise ratios （SNRs）. Simulation results, given in Figs. 4, 5 and 6 in the full paper, show preliminarily that, at the same SNR, the error caused by the inconsistency of phase frequency responses is much larger than that caused by the insistency of amplitude frequency responses.

关 键 词：二维压差式矢量水听器 声能流 声源估计 

分 类 号：TB559[理学—物理]