声压基阵误差单辅助矢量水听器快速校准方法

Fast error calibration method of sound pressure array with an assisted vector hydrophone

针对方位依赖的声压基阵误差校正困难问题,提出了声压基阵误差单辅助矢量水听器快速校准方法。利用精确校正的单只矢量水听器,就可以对声源方位及方位依赖的声压基阵幅度相位误差,进行无模糊的联合估计。由于阵元位置误差、互耦及通道的幅度相位误差均可以等效为方位依赖的基阵幅度相位误差,所以可以对多种同时存在的基阵误差进行校正。该方法适用于任意的阵列结构,不存在参数联合估计的局部收敛问题,只需参数的一维搜索,运算量小可实时在线完成。通过计算机仿真实验验证了该方法的有效性。

Due to the difficulty of error correction for direction-dependent sound pressure array,this paper proposes a fast error calibration method of sound pressure array with an assisted vector hydrophone.By using the assisted vector hydrophone with accurate calibration,the sound source position and direction-dependent amplitude-phase error of sound pressure array can be estimated without ambiguity.Because the array element position errors,mutual coupling and the channel amplitude-phase errors can be equivalent to the position-dependent amplitude and phase errors of the array,a variety of array errors can be corrected at the same time.The method in this paper is suitable for arbitrary array structures and does not have local convergence problem of parameters joint estimation.This method only needs one-dimensional parameter search,and has the advantages of small amount of computation and real-time online performing.The effectiveness of this method is verified by computer simulation.