基于辅助阵元校正法的柔性阵列阵元位置校正

本文介绍了两种用于校正大型柔性声纳阵列的阵元位置的方法。在阵列进行海底铺设后,阵元位置的不确定,会大大降低声纳搜索方位的性能。辅助阵元校正方法考虑使用阵上较短距离间隔的阵元作为辅助阵元来对信号到达角和阵元相对相位同时进行估计。并从至少两组不同方位声源点测得的数据,获得阵元的相对坐标位置,得到阵形。为了保证校正的有效性,我们比较了这两种辅助阵元校正方法,通过大量的仿真试验比较它们对辅助阵元误差扰动的敏感度,并选择了宽容性较好的MUSIC辅助阵元方法进行了实际的海上试验。

The calibration of the flexible array''''s sensor position based on instrumental sensor method

Two methods to calibrate the sensor positions of the large flexible array had been proposed here. Sensor locations uncertainty can severely degrade the performance of directional system after the array had been lied under the sea bottom. The two closer sensors of the array were used as the instrumental sensors to estimate DOAs and the elements' phases at the same time. There were at least two sets of calibration data from angularly separated source positions to estimate the sensors positions and the array shape. In order to calibrate the array shape correctly, we had compared the two methods through a mount of simulation to find out which one would be more robust while the instrumental sensors were disturbed.And the more robust method of MUSIC instrumental sensors method had been used for the data of sea tests from the seatrial.