用于声线跟踪定位的自适应分层方法

摘要

对于高精度水声定位系统，声线跟踪技术已成为克服声线弯曲影响提高定位性能的必要手段，而广泛采用的等层厚分层法存在着定位精度与计算量的矛盾。针对该问题提出了一种自适应分层方法，通过引入等效声速剖面思想进行分层截断误差控制，实现任意声速剖面在指定精度下最少层数非等间距划分的自适应搜索，并对其性能进行了分析讨论。试验数据分析表明：对5000 m水深的目标在同样精度条件下该方法比常规分层方法计算量节省了70％，有效地解决了定位精度与计算量的矛盾，具有良好的工程应用价值。%Ray-tracing technology is an indispensable method to effectively handle the problems associated with sound-trail bends and helps promote the positioning performance of the high -precision acoustic positioning system .It is difficult to solve the conflict between the positioning precision and the amount of computation for the equal -interval division problem which is widely used in practice .In this paper , a self-adapting division method based on the equiva-lent sound velocity profile theory is presented .By controlling the interceptive error of sound velocity , the division re-sults of this method is optimized to have the least amount of layers and unequal intervals , and its performance is ana-lyzed.The experiments show that compared to the equal-interval division , 70%of the computation is economized by using the self-adapting division method to locate a 5 000 m target for the same precision .