| As an important pillar of national defense technology,underwater acoustic technology has been paid more and more attention with the improvement of China’s comprehensive national strength.The classification and discrimination of air,sea and underwater targets is always the key and difficult point of underwater acoustic technology.Based on the difference of interference sound field caused by radiated noise of air,sea and underwater target propagating in underwater waveguide,this paper uses single vector hydrophone to determine the target depth attribute.Firstly,this paper deduces and studies the interference structure of shallow sea sound field,and focuses on the analysis of sound propagation theory and vector signal theory in waveguide,so as to build a theoretical foundation for the target depth attribute determination simulation in the following paper.Secondly,the depth attribute determination algorithm of surface and underwater targets is deduced and simulated.The target depth attribute determination algorithm is theoretically derived,and the feasibility of the underwater sound field verification algorithm is constructed by Using Kraken C sound field model.The effects of receiving depth,sound source frequency and sound velocity gradient on the performance of the algorithm are verified by simulation experiments under different conditions.In this paper,the object depth attribute determination algorithm is combined with matching field algorithm,and the passive estimation of the object depth is further realized by matching field under the condition of obtaining the prior distance information of the object when the third-order simple positive wave is excited.Finally,the depth attribute determination algorithm of air target is deduced and simulated again.The simple positive mode of underwater acoustic field excited by air point source field and the transmission loss of water transmitted by air target are theoretically derived,and the feasibility of underwater acoustic field verification algorithm is constructed by Kraken C acoustic field model.By analyzing the characteristics of air target radiating sound and combining its propagation path with Doppler algorithm,the parameter estimation of air target is realized.Simulation results show that the parameter estimation algorithm is correct and feasible.The authenticity and accuracy of the depth attribute determination algorithm are verified by combining the data from sea trials.In this paper,the depth attribute of single vector hydrophone is determined by using line spectrum interference structure,and the influencing factors of each variable are analyzed.The correctness and feasibility of the algorithm are verified by simulation and sea trial data processing. |
