基于SINS/USBL/DG的水下动态重力测量  

Underwater dynamic gravimetry based on SINS/USBL/DG

作　　者：熊志明 杨柏楠 曹聚亮[1] 蔡劭琨 于瑞航 XIONG Zhimmg;YANG Bainan;CAO Juliang;CAI Shaokun;YU Ruihang(College of Intelligence Science and Technology,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学智能科学学院,湖南长沙410073

出　　处：《海洋测绘》2023年第1期15-18,23,共5页Hydrographic Surveying and Charting

基　　金：大地测量与地球动力学国家重点实验室开放基金(SKLGED2022-1-5)。

摘　　要：水下重力信息在深水油气勘探和潜航器辅助导航中发挥着重要作用。多普勒测速仪(DVL)由于工作范围受限无法时刻输出有效的数据,若作为水下传感器用于重力测量会影响数据处理的可靠性和准确性。针对这一难题,提出了一种基于捷联式惯性导航系统(SINS)/超短基线定位系统(USBL)/深度计(DG)组合导航的水下动态重力测量方法。该方法无需利用外部高精度的速度观测就能实现动态重力测量,摆脱了水下动态重力测量对DVL的依赖,在某海域进行了水下动态重力测量试验以验证新方法的有效性。试验结果证明,重复线内符合精度可以达到1 mGal的水平。Underwater gravity message has an important effect in deep water oil and gas detection and submarine navigation.Doppler Velocity Log(DVL)cannot output effective data at any time due to its limited working range.If DVL is used as an underwater sensor for gravity measurement,the reliability and accuracy of data processing will be affected.To solve this problem,an underwater dynamic gravimetry method based on SINS/USBL/DG was designed in this paper.This method can realize dynamic gravimetry without using external high-precision velocity observation,and breaks away from the dependence of underwater dynamic gravimetry on DVL.An underwater dynamic gravimetry test was implemented in an ocean area to validate the efficacy of the new method.The test results reveal that the accuracy of in-line coincidence can reach lmGal level.

关 键 词：水下动态重力测量 多普勒测速仪 捷联式惯性导航系统 超短基线定位系统 深度计 

分 类 号：P229.23[天文地球—大地测量学与测量工程]