【摘要】 水听器是一种用于将水声信号转换为电信号的水下声电传感器。为了实现对水下目标的定位识别,需要用多只水听器构成传感器基阵。文中给出了一种实现恒定束宽传感器基阵的设计方法。它从求解无约束最优化问题出发,根据描述基阵实际空间响应和预成空间响应之间差异的数学表达式构造了相应的目标函数,然后依据此目标函数的特性,利用最速下降法获得实现恒定束宽阵所需频域加权矢量。针对均匀线阵和圆弧阵进行的计算机仿真结果表明,该方法不但具有很高的计算精度,而且适用于不同的阵型。更多还原

【Abstract】 Hydrophone is an underwater acoustic-electric transducer for underwater acoustic signals into electrical signals. In order to achieve the objectives of the underwater location and identification, it needs constitute transducer arrays with more than two hydrophones. This paper presents a realization of the frequency invariant response array design. It is started from unconstrained optimization problems. The correlative objective function is presented based on the expression to describe the difference between actual and scheduled spatial response of the array. A new arithmetic is proposed to obtain the frequency invariant weight vectors by applying the steepest-descent algorithm. Computer simulations for uniform linear array and circular array have verified that the new method has high convergence precision and can be applied to arbitrary array.更多还原