Research on extraction method of ship's shaft-rate feature by fusing acoustic and electric field
Shaft-rate acoustic field and shaft-rate electric field are closely related to ship's propellers rotation.This pa-per integrates these two kinds of physical fields to extract ship shaft-rate feature.Firstly,DEMON spectral analysis method and power spectral analysis method are used to extract the line spectrum of shaft-rate acoustic field and shaft-rate electric field,respectively.Then,all the extracted line spectrums are fused and purified.Finally,the maximum common divisor method is used to extract the shaft-rate feature.In order to verify the effectiveness of the proposed method,the acoustic and electric field data of several ships are used.The results show that,the shaft-rate acoustic field and shaft-rate electric field line spectrum of the same ship have good similarity in frequency.The fusion of the shaft-rate acoustic field and electric field line spectrum can effectively compensate for the loss of line spectrum when only single physical field is used.The accuracy and stability of ship shaft frequency estimated by fusion of acoustic field and electric field is better than that of single physical field.
ship's acoustic fieldship's electric fieldshaft-rate featurefused extraction
NETL
NSTL
万方数据
