浅海声场单模闭环发射的最佳估计算法

An optimal algorithm for single-mode close-loop excitation in shallow water

提出了一种浅海声场单模闭环发射的最佳估计算法。通过对声场格林函数矩阵估计协方差的分析,设计了一种对格林函数矩阵作最佳估计的最佳发射阵权系数矩阵,此权系数矩阵为酉矩阵且各元素绝对值相等。基于此矩阵的单模发射算法可以使得单模激发过程以最快的速度收敛,并且发射稳定。算法的优势在模拟计算中得到了验证。最后给出了海上实验的结果,单模含量高达97%。

An optimal algorithm for single-mode close-loop excitation in shallow water is presented. By analyzing the covariance of estimation value of Green＇s function matrix, an optimal source array weight matrix is presented to estimate Green＇s function matrix. The weight matrix is a unitary matrix, and absolute values of the matrix elements are equal. Algorithm based on the weight matrix makes single-mode excitation converge at maximum speed and be steady. Advantages of the algorithm are confirmed by numerical simulations. Finally, results of shallow water experiment are presented, and the energy ratio of single mode is higher than 97 percent.