Ocean wave directional spectrum estimation using spatio-temporal array of acoustic ranging and current measurement

作     者：RAO Liang DENG Kai ZHANG Zhaowei WANG Changhong RAO Liang;DENG Kai;ZHANG Zhaowei;WANG Changhong

作者机构：Institute of AcousticsChinese Academy of SciencesBeijing100190 University of Chinese Academy of SciencesBeijing100049 Beijing Engineering Technology Research Center of Ocean Acoustic EquipmentBeijing100190 

出 版 物：《Chinese Journal of Acoustics》 (声学学报（英文版）)

年 卷 期：2024年第43卷第3期

页      面：311-331页

核心收录：

学科分类：08[工学] 0816[工学-测绘科学与技术] 

基　　金：supported by Frontier Exploration Project Independently Deployed by Institute of Acoustics,Chinese Academy of Sciences(QYTS202002) National Key R&D Program of China(2021YFC2800200) 

主　　题：spectrum ocean directional 

摘      要：An approach to estimate ocean wave directional spectrum using spatio-temporal array of acoustic ranging and current measurement is proposed,and the 5-beam acoustic Doppler current profiler(ADCP)constructs a spatio-temporal array of acoustic ocean surface elevation tracking and acoustic Doppler current velocity measuring for directional wave *** on the linear wave theory and the space-time equivalence principle,the time-space transfer function applicable to the spatio-temporal array is proposed,and then the time delay term is compensated in the calculation of the covariance *** method can reduce the error of the directional spectrum *** results show that for the low signal-to-noise ratio from 0 dB to 5 dB,compared with the 4-beam synchronous array method,this method has a smaller root-mean-square error of the peak estimation of the directional *** field test shows that,compared with the 4-beam synchronous array method,the 5-beam spatio-temporal array method improves the kurtosis index of the directional spectrum from 2.31 to 2.80,and the correlation coefficient between the peak wave direction results of the ADCP and the buoy is increased from 0.80 to 0.83 in mild wave ***,the spatio-temporal array method can increase the degree of freedom of wave measurement,reduce the minimum aperture of the array,and increase the upper cut-off frequency of the estimable directional spectrum.