Design And Implementation Of Electronic Platform For Ship Acoustic Simulator

With the development of underwater acoustic signal processing technology,the performance of Decoy Simulation of underwater acoustic bait and underwater acoustic character simulator has been gradually improved,so that intelligent torpedo can not track and locate targets effectively now.In order to improve the detection and recognition ability of intelligent torpedo and to enhance warships' combat capability,this paper designed a set of sound simulation equipment of intelligent ship equipped with eight core TMS320C6678 processor of TI company that can achieve simulation in active and passive mode.In passive mode it can simulate ship radiated noise in a variety of ways.In active mode,by simulating the target echo intensity and scale difference in the process of active detection it provides the sound input for the intelligent acoustic detection system and distributed underwater cooperative detection system to improve the detection and identify ability of the submarines and underwater weapons.The intelligent acoustic feature simulator designed in this paper has the function of simulating the intensity and space scale of torpedo homing signal in different angles,and the function of simulating the ships' noise.The specific function and parameters can be controlled by upper computer.When the intelligent torpedo working in active mode,the intelligent acoustic characteristics simulation system can choose to store forwarding mode or fixed echo response mode and when the intelligent torpedo working in passive mode,it can according set parameters simulate the ship's noise time frequency characteristics or direct firing the ship noise.In order to ensure the accuracy and real-time requirement of multi-channel echo,it is necessary to choose a processing chip with powerful computing power as the core of signal processing.The simulator uses the DSP+FPGA real-time signal processor structure,and carries out the Xilinx XC7K325 T FPGA as the system bus integrated controller.It carries the eight core TMS320C6678 processor of TI company as the core of the system processing.The processor integrates 8 high-performance CPU / 1.25 GHz functions.The highest frequency of each core is 1.25 GHz,fixed-point performance is as high as 40 GMAC,and the floating point performance is as high as 20 GFLOP.The acoustic feature simulator adopts multi-channel signal parallel processing mode,giving full play to the multi-core performance of TMS320C6678 processor,and accurately and real-time estimation of multi-channel signal parameters,so that we can achieve the multi angle and multi highlights real-time simulation of the ship's acoustic characteristics under active passive working mode.In the aspect of multi core collaboration,the real-time operating system of DSP optimized by Enea company,OSE,is used as the running framework of the system.OSE provides LINX interprocess communication services,making it more convenient and effective to conceptualize,segment and extend multicore applications.