双矢量潜标被动定位方法研究
Passive location algorithm for the dual subsurface-buoy system with a vector hydrophone

为了解决双矢量潜标交会定位法在基线区定位误差大的问题,根据定位方程推导了时差定位法和交会定位法在二维坐标系下的定位误差几何稀释的最简数学表达式。依据实际双潜标系统的测量误差,数值仿真给出了两种方法的定位误差分布的等高线图,对比分析可以得出,时差定位法能很好改善基线区的定位效果,而交会定位法在远离基线区时定位性能优于时差定位法,然后通过分析目标方位对定位精度的影响给出测角误差对定位产生很大影响的原因,与数学表达式分析结论吻合。最后将两种定位方法应用于实验数据处理中,验证了数值仿真分析的结论,为双潜标定位系统的实际应用提供参考。
In order to solve the bad positioning performance of cross locating method near the baseline, mathematical expressions for the geometrical dilution of precision are derived in two-dimensional coordinates for cross locating method and time difference measuring method. According to the actual measurement error of the dual subsurface-buoy system, computer simulations show the contour maps of positioning error distribution of the two methods. The conclusion is that time difference measuring method can improve the positioning performance near the baseline. The positioning performance of cross locating method far away from the baseline is better than time difference measuring method. And angle measurement error has more influences on cross location method by analyzing the effect of target bearing on the positioning accuracy. Finally applying two methods in sea trial data processing, the conclusion of computer simulations is verified. The result of this study can provide an important reference for practical applications of the dual subsurface-buoy system.