SEQUENCE TIME WINDOW AMPLITUDE-PHASE-FREQUENCY CHARACTERISTICS ANALYSIS METHOD FOR UNDERWATER VEHICLE POWER FREQUENCY ELECTROMAGNETIC FIELD DISTURBANCE

A sequence time window amplitude-phase-frequency characteristics analysis method and system for underwater vehicle power frequency electromagnetic field disturbance are provided. The method includes: establishing a power grid dipole group model, emulating and calculating to obtain background field i...

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Bibliographic Details
Main Authors Zhang, Tianxu, Zhang, Tao, Tan, Jiandong, Yang, Cheng, Wang, Jiawei, Lv, Yuhai, Zhang, Qinghui
Format Patent
LanguageEnglish
Published 06.07.2023
Subjects
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
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Summary:A sequence time window amplitude-phase-frequency characteristics analysis method and system for underwater vehicle power frequency electromagnetic field disturbance are provided. The method includes: establishing a power grid dipole group model, emulating and calculating to obtain background field intensity data of a test location, and constructing an emulated background field database; acquiring measured background field data, comparing the emulated data with the measured data, and providing a relative error; calculating a background field intensity and underwater vehicle target disturbance under the action of the above dipole group, and establishing a measured target signal database; and performing actual measurement according to an underwater vehicle motion and detection topology, performing a Fourier transform and Fourier sliding window decomposition after acquiring original data, and acquiring an amplitude spectrum and a spectrogram of an underwater vehicle target disturbance signal.
Bibliography:Application Number: US202218148472