• 学报（中文） •

### 未知声速下长基线系统定位修正算法

1. 西北工业大学 航海学院， 西安 710072
• 出版日期:2019-03-28 发布日期:2019-03-28
• 通讯作者: 严胜刚，男，教授，博士生导师，电话(Tel.):029-88494590；E-mail：yshgang@nwpu.edu.cn.
• 作者简介:黄健（1986-），男，四川省江油市人，博士生，主要研究方向为信息与通信工程和水下声学定位等.
• 基金资助:
国家自然科学基金面上项目（61371151）

### Positioning Correction Algorithm for Long Baseline System with Uncertain Sound Speed

HUANG Jian,YAN Shenggang

1. School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
• Online:2019-03-28 Published:2019-03-28

Abstract: In long baseline positioning system, the error induced by uncertain sound speed is the most damaging factor affecting the positioning accuracy. A long baseline system positioning correction algorithm with uncertain sound speed is proposed by setting the acoustic signal to propagate between the target and different hydrophones at different sound speed. First, a multi-parameter optimization function is built to estimate the effective sound speed using the redundant information in the long baseline system. Then the particle swarm optimization algorithm is utilized to solve the optimization function, and the effective sound speeds between the target and each hydrophones are obtained. Finally, the target is positioned by the resulting effective sound speed. The simulation results show that the proposed algorithm can effectively improve the positioning accuracy of long baseline positioning system compared with the existing algorithms.