【作者】 石杰； 相敬林； 陈韶华；

【Author】 SHI Jie XIANG Jing-lin CHEN Shao-hua (College of Marine,Nort hwcstern Polytechnicai University,Xi’an 710072,China)

【机构】 西北工业大学航海学院；

【摘要】 提出了一种非典型声强向量阵形,它由空间正交、间距可调的四个声基元组成,可方便的安装在小尺度水下探测平台上,实现低频声源的三维空间被动定向;分析了系统的有限差分误差、各通道的相位失配和海洋环境噪声引起的定向误差。用实测的舰船辐射噪声数据进行了计算机仿真实验,实验结果表明选择合适的阵元间距,该阵形能达到较高的定向精度。更多还原

【Abstract】 A non-typical vector sound intensity array is presented here.It consists of 4 sensors that formed a spatial cross and the space between the sensors can be changed.Its unique structure makes it adapted to fixing in some small size underwater platforms. As the typical vector sound intensity array,this array can find the direction of a low frequency acoustic source with high precision either.In this paper,we analyze theoretically the direction estimation errors caused by finite difference approximation error、 instrumentation phase mismatch error and statistical error in detail.The computer simulation results show that this array can achieve a high direction finding precision with properly choosing the space between sensors.更多还原