基于选权迭代的走航式水声差分定位方法

发布时间：2018-06-01 21:17

本文选题：水下声学定位 + 差分算法　；参考：《石油地球物理勘探》2017年06期

【摘要】：水下声学定位中存在应答器时延等系统误差,若采用传统的几何法定位,因系统误差难以改正或消除而导致定位精度降低。针对该问题,本文采用历元间差分的方式减弱或消除系统误差。结合石油物探走航式水下定位实际,给出了相应的水下差分模型。同时,考虑到水下声学观测值中不可避免地存在粗差,采用基于选权迭代的抗差估计进行解算。模拟算例和实测数据验证结果表明:历元间差分定位方法定位精度优于传统的几何法,国产BPS水下声学定位系统在50m以内水深可实现1m定位精度。
[Abstract]:There are some system errors such as transponder delay in underwater acoustic positioning. If the traditional geometric method is used, the positioning accuracy will be reduced because the system error is difficult to correct or eliminate. In order to solve this problem, the system error is reduced or eliminated by means of difference between epochs. Combined with the underwater positioning practice of petroleum geophysical exploration, the corresponding underwater differential model is given. At the same time, considering the inevitable gross error in underwater acoustic observations, the robust estimation based on weight selection iteration is used to solve the problem. The results of simulation and experimental data show that the positioning accuracy of the differential positioning method between epoch is better than that of the traditional geometric method, and the domestic BPS underwater acoustic positioning system can achieve 1m positioning accuracy within 50 m water depth.
【作者单位】：中国石油大学(华东)地球科学与技术学院;海洋国家实验室海洋矿产资源评价与探测技术功能实验室;东方地球物理公司;海洋石油工程股份有限公司;中国地质调查局青岛海洋地质研究所;
【基金】：国家重点研发计划项目(2016YFB0501700,2016YFB0501705) 国家自然科学基金项目(41374008,41406115) 国家科技支撑计划项目(2014BAK11B01)联合资助
【分类号】：TB56

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