障板条件下矢量传感器高精度测向研究  

Research on high-precision DOA estimation of a vector sensor under baffle conditions

作　　者：梁国龙 庞福滨 张光普 

机构地区：[1]哈尔滨工程大学水声技术重点实验室,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2013年第12期1502-1508,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51279043;51009042);水声技术重点实验室基金资助项目(9140C200802110C2001);中央高校基本科研业务费专项基金资助项目(HEUCF12502)

摘　　要：矢量传感器安装在水下平台进行探测定位时,其测量结果会受到平台声散射的影响,导致各通道的接收指向性畸变,进而影响其测向精度.针对上述问题,首先以边界元法仿真分析了有限长圆柱障板条件下矢量传感器各通道的接收指向性;并根据不同入射频率、矢量传感器的安装位置条件下其测得的目标方位与真实目标方位的映射关系,进一步提出了利用反演法将实测方位映射回目标真实方位的方法.反演法需要已知信号的频率、矢量传感器安装位置等先验信息,计算量较大.仿真表明,反演法可以实现障板条件下矢量传感器的高精度测向.When a vector sensor is installed on an underwater carrier to detect and position targets, the measuring results will be affected by the acoustic scattering of the carrier, resulting in the direction distortion of the receiving channels and the decline in accuracy of the DOA estimation. With a focus on the aforementioned problem, firstly the influences of diffraction by a finite cylinder under baffle conditions on the vector sensor were calculated using boundary element method（BEM） ; then according to the mapping relationship between the measured direction by the vector sensor and the real target direction at different incident frequencies and installing positions, the inversion method to transform the measured direction to the real target direction is proposed and discussed in further detail in the paper. The inversion method requires prior knowledge of the incident frequency, the installation position of the vector sensor, and as a result requires a large amount of calculations. Simulation results show that the inversion method enables a high-precision DOA estimation of a vector sensor under baffle conditions.

关 键 词：反演法 障板条件 矢量传感器 高精度测向 声散射 入射频率 

分 类 号：TB566[交通运输工程—水声工程]