基于自适应滤波的晃动相关电场噪声抑制方法  

Sway related electric field noise suppressing method based on adaptive filter

作　　者：喻鹏 程锦房[1] 张伽伟[1] 姜润翔 YU Peng;CHENG Jinfang;ZHANG Jiawei;JIANG Runxiang(College of Weaponry Engineering,Naval University of Engineering,Wuhan 430033,China;College of Electrical Engineering,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学兵器工程学院,湖北武汉430033 [2]海军工程大学电气工程学院,湖北武汉430033

出　　处：《华中科技大学学报（自然科学版）》2021年第4期61-66,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51509252);青岛国家海洋实验室资助项目(SQ2017WHZZB0202)。

摘　　要：针对水下浮动平台电场测量(简称电场浮标)噪声抑制问题,首先,分析了电场浮标的晃动姿态角与所测得环境电场之间的相关性,结果表明:当浮标晃动程度较大时,姿态角与所测电场之间存在一定的相关性.然后,提出一种以姿态角为参考量的晃动相关电场噪声自适应滤波算法,并利用实测环境电场数据进行有效性验证,结果表明所提方法能够抑制晃动相关电场噪声,且该晃动噪声的中心频率主要是海浪频率.最后,进行半实物仿真验证,结果表明所提方法能够提升目标电场的信噪比.Aiming at the noise suppressing of underwater electric field measurement with floating platform(abbreviated form as electric field buoy),the correlation between the sway attitude angle of electric field buoy and the measured environmental electric field was analyzed first,and results indicate that a certain correlation between the sway attitude angle and the measured electric field exists when the swaying degree of the buoy is relatively high.Then,a sway related electric field noise adaptive filtering method was proposed with the reference of sway attitude angle,and the effectiveness was validated by the measured environmental electric field data.Experimental results indicate that the proposed method can suppress the sway related electric field noise,and the central frequency of the sway related noise is mainly the frequency of ocean waves.Finally,a semi-physical simulation was carried out,and results indicate that the proposed method can improve the signal to noise ratio of the target′s electric field.

关 键 词：水下电场 浮动平台 晃动噪声 相关性 自适应滤波 

分 类 号：P715.5[天文地球—海洋科学] P714