低频小尺寸高精度空中运动目标定位算法  

Research on a High Precision Algorithm based on Small Size Arrays in Low Frequency Band for Low Altitude Targets Location

作　　者：蔡宗义[1] 赵俊渭[2] 吴娜[1] 李家武[1] 

机构地区：[1]西北核技术研究所,陕西西安710613 [2]西北工业大学声学工程研究所,陕西西安710072

出　　处：《火力与指挥控制》2008年第11期147-151,共5页Fire Control & Command Control

基　　金：国防科技重点实验室基金(51446040103HK0302);国防预研基金资助项目(413070101)

摘　　要：提出了一种基于声矢量传感器的低空目标定位方法,在小尺寸阵元和低频条件下,对空中目标的精确定位进行了仿真实验研究。采用实测的空中目标辐射的噪声信号对算法进行了分析,研究了不同信噪比和积分时间对定位算法的影响。研究结果表明,矢量传感器定向误差与波达方向无关;当矢量传感器尺寸为0.2m,积分时间50m s,信噪比10dB时,对实测的某型低空目标信号仿真,单个矢量传感器定向误差为1.2,°系统定距误差与传统的声压传感器定位系统相比,其阵元尺寸减小了一个数量级,而定位精度尚有较大提高。An algorithm, for acoustic passive location using acoustic vector sensors is presented. With the characteristics of acoustic vector sensor, accurate location is attained based on small size vector sensors in the low frequency band. The performance of the proposed method is described, followed by experimental investigation with noise data radiated by low altitude target. The influence of the integration time and SNR （Signal-to-Noise Ratio） on the accuracy of location is analyzed, respectively. The results show that the bearing estimation error is independent of the direction of arrival and its error is only 1.2 degree, with vector sensor size 0.2m, integration time 50ms and SNR 10dB. Comparing to the traditional pressure measurement system, the vector sensor size of the new method is lowered to a tenth, but its location performance improved greatly.

关 键 词：声学 矢量传感器 被动定位 低空目标 

分 类 号：TN911.72[电子电信—通信与信息系统]