T^2-R型多基地声纳定位精度研究

Research on Accuracy of Localization Algorithm for T^2-R Multistatic Sonar

建立一种T2-R型多基地声纳定位的几何模型,提出利用时间-方位信息进行目标定位(MTBL)算法,并给出算法定位误差的几何分布。通过数值仿真,重点研究了基线长度、声源配置和测量误差对算法定位精度的影响,并对其他影响因素也作了定性分析。仿真分析结果表明:随着基线长度增加,大部分区域定位精度提高;在一定的声源配置方式下,算法精度对时间测量误差比较敏感,而方位测量误差对定位精度影响较小;合理进行声源配置,可以提高探测区域的平均定位精度。该研究为T2-R型多基地声纳的水下定位提供了理论依据。

A geometrical model for geometrical localization of T^2-R muhistatic sonar is established. A muhistatic time-bearing-localization （MTBL） algorithm is proposed, and the error of geometrical dilution is presented. The effects of baseline length, sonar deployment and measurement error on the localization accuracy of algorithm are studied through numerical simulation, and other indispensable influencing fac- tors are qualitatively analyzed. The simulation results show that the localization accuracy in most regions is improved with the increase in length of baseline. For the given deployment mode, the localization accu- racy is sensitive to the time measurement error, but the bearing measurement error has a limited impact on the performance of the algorithm. The proper deployment of sound sources can enhance the mean localization accuracy. The study provides a well theoretical evidence for underwater localization of T^2-R muhistatic sonar.