长基线水声定位系统中一种迭代声速修正算法

长基线水下目标定位算法主要根据几何原理进行定位,目前常用的解算方法是根据几何原理列出方程组,直接对方程组进行解算得到目标位置的近似解。通过对长基线定位算法方程组的几何分析,选取不同几何交汇点作为目标近似解,比较各目标近似解的定位精度并找到最优解;同时依据解算算法及其几何关系,提出一种迭代声速修正算法,不但提高了同步工作方式下阵内目标点的定位精度,而且算法复杂度低,实现简单。最后,通过仿真分析验证了此算法的有效性。

Iteration algorithm of revising sound velocity for long baseline acoustic positioning system

The algorithm for long baseline（LBL） positioning system is mainly based on the geometry theory.The commonly used method is directly to solve equations based on geometry principle,so as to obtain the approximate so-lution of the target location.Through geometric analysis of the long baseline positioning system,the work on choosing different geometric intersection as the target positions,comparing the target positioning accuracy of the approximate solution and finding out the optimal solution is done,and meanwhile,an iteration algorithm of revising the sound ve-locity for long baseline positioning system is proposed in this paper.This revised algorithm not only improves the posi-tioning accuracy of the target point array for synchronous work,but also lowers the computational complexity,which makes it easy to use.At last,the algorithm is proved to be effective through simulation analysis.