一种运用倾角传感器的阵形修正算法

An algorithm for array shape calibration using tilt sensors

垂直水听器阵在实际海洋环境中通常呈现出一定的倾斜状态,各阵元之间存在水平相对位移,对其性能带来很大影响。为了消除阵倾斜带来的影响,提出了一种运用倾角传感器进行阵形修正的算法。具体实现步骤为,首先用多个倾角传感器测得垂直阵上不同位置的倾角,然后通过求解线性方程组以及傅里叶级数分解的方法,利用倾角数据拟合出阵形的函数曲线,从而得到垂直阵上不同阵元的相对水平位移。最后通过实验对算法进行了验证,实验结果表明,算法有效可靠,可以得到准确的阵元水平位移值,有望在实际海洋环境中得到应用。

Vertical hydrophone array is usually inclined in ocean environment.Elements of the array have relative ho-rizontal displacement,which limits performance of the array.In order to eliminate this effect,an algorithm for array shape calibration using tilt sensors is presented.Firstly,tilts at different position of the vertical array are measured by tilt sensors.Then a curve fitting process is performed to get the array shape by using Fourier series method,and the relative horizontal displacements between elements of the vertical array can be obtained.Finally,the algorithm is con-firmed by experiment,and the results show that the algorithm is effective and the horizontal displacement between elements of the array can be obtained exactly.The algorithm is hopeful to be applied in ocean environment.