Simulation Study On The Performance Of Underwater Acoustic Countermeasure Equipment

Underwater acoustic warfare equipment has become an indispensable part of modern naval warfare.Especially under the background of information warfare,it is particularly important to study the performance of underwater acoustic warfare equipment in complex marine environment.Under the influence of many factors,if the performance of a variety of underwater acoustic countermeasure equipment is studied in real objects in the sea test,it will face many problems,such as high experimental cost,long experimental period and a large number of manpower requirements.To make matters worse,the marine environment in sea trials is uncontrollable.Tides,wind speeds,and the behavior of marine organisms make it more difficult to acquire the signal data of countermeasure equipment,and the performance research of underwater acoustic countermeasure equipment becomes more complex.Therefore,it is necessary to establish a simulation system for underwater acoustic warfare equipment performance to meet the needs of national defense science and technology development.The simulation system can not only save a lot of research funds,greatly shorten the development cycle of underwater acoustic countermeasure equipment,but also can be used for battlefield simulation in actual combat situations,increase battlefield transparency,help fighters to understand and predict battlefield situation more intuitively,shorten reaction time,and then make more favorable strategic decisions for us.In this paper,based on a signal level simulator system simulation project,the performances of various types of underwater acoustic countermeasure equipment are simulated,and the performance simulation system of underwater acoustic countermeasure equipment is integrated based on the third generation standard signal processor of underwater acoustic equipment.Firstly,based on the process of underwater acoustic signal processing,the overall structure of underwater acoustic countermeasure equipment performance simulation system is proposed,and the main simulation modules are introduced,and different simulation processes are designed from the perspective of enemy torpedo observation and our ship observation.The overall architecture of the system is completed,and the working principle of the main program simulation module and its construction process are further given.The signal generation module of target or equipment is a multi-signal generation equipment,including the radiated noise of underwater acoustic target(ship,submarine,torpedo,etc.)and the signal generation of underwater acoustic countermeasure equipment including active/passive acoustic decoy,suppressed jammer,etc.The jamming background simulation module is mainly responsible for the simulation of the jamming environment of equipment/target,and introduces the main factors affecting the system's Ocean channel,the calculation method of propagation loss and the simulation of ocean environmental noise,which makes the simulation system more suitable to the actual complex ocean environment and improve the reliability of simulation results;the receiving signal module generates the received signal of the sonar;The signal processing module analyzes various interferences of various countermeasure equipment against enemy torpedo and our sonar from two aspects: the target direction of sonar detection and the timefrequency analysis of the received signal.Finally,the parallel computing system based on a large number of multi-core processors of TMS320C6678 on three generations platform makes the module simulation program realize in parallel,which greatly improves the speed of operation,so as to meet the requirements of real-time simulation of the system,cooperate with the PC simulation deduction and debugging center,and improve the human-computer interaction.Underwater acoustic warfare equipment performance simulation system is different from other general underwater acoustic simulation system,whose emphasis is that it can analyze the influence of our sonar equipment on our own countermeasure equipment in the countermeasure scenario,so as to provide reference and signal level support for accurate evaluation of underwater acoustic warfare equipment performance,countermeasure equipment working parameters and countermeasure equipment strategy.