The Passive Real-time Simulation System Of The Towed Sonar In Virtual Ocean Environment

With the continuous development of military science and technology, the transmitting and perception of the underwater targets has got more and more people's attention. Especially in the modern sea battle, timely capture of enemy information has very important strategic position. Around the virtual ocean environment towed sonar passive combat simulation system of real-time simulation technology, this article talking about something, it contains the transmitting signal of the target, the simulation of the virtual Marine environment and the received signal data calculation. Writing the software code in the gcc of Linux system,combine with high configuration blade servers and other hardware equipment, eventually build a towed sonar passive combat performance real-time simulation system. Using this system, not only can realize real-time simulation of passive sonar signals in virtual ocean environment, can also do the further processing of the received signal in real time.Paper first introduces the system architecture of the towed sonar passive combat system,an overall train of thought, the simulation system design based on the difference of the function modules, and each function module realization process block diagram is given. The acoustic environment of virtual naval battle field simulation is analyzed, including the propagation loss prediction, the three-dimensional acoustic field simulation modeling and marine environmental noise simulation. Then detailed introduces the simulation principle and simulation module of the software implementation process, including the target signals module and receiving module, the beam-forming module, broadband energy detection module, single beam LOFAR analysis module and single beam DEMON analysis module.Finally, through the OpenMP and MPI parallel programming model enables simulation program to parallel implementation on the blade, so as to improve the computing speed and meet the requirements of real-time simulation of system operation function. The system can realize real-time detection of multi-objective at the same time. This paper gives the operation of the single machine commissioning analysis and on-line debugging time consuming analysis. This simulation system can effectively shorten the sonar equipment development cycle, save research grants, and lay the foundation for developing more advanced passive sonar system.