小型水下航行器典型低频物理场特征试验研究OA

Current research on undersea multi-physical field detection mostly focuses on large-scale targets such as ships and submarines,while little attention has been paid to joint multi-physical field detection for small undersea vehicles.To investigate the low-frequency characteristics and inter-field correlation of multi-physical fields within 100 Hz and below for small undersea vehicles,field tests were carried out in a shallow-water sheltered harbor.Signals of acoustic,electric,magnetic,water pressure,seismic wave,and alternating magnetic fields were synchronously acquired.After data preprocessing and power frequency interference suppression,the time-domain passage characteristics and frequency-spectrum features of each physical field were analyzed,and the coupling characteristics of multi-physical fields were discussed.The results show that the electric field and magnetic field exhibit strong correlation and common-source characteristics,and the alternating magnetic field contains richer target feature information.The frequency-domain characteristics of the acoustic field and seismic wave field are highly consistent,and the seismic wave field is significantly superior to the water pressure field in resisting marine environmental interference.This study analyzed the typical low-frequency multi-physical field characteristics and coupling laws of small undersea vehicles,which can provide experimental support for joint multi-physical field detection and recognition of undersea small targets.