Research On Simulation System Of Underwater Acoustic Target Radiated Noise Based On ARM

In order to solve the performance test of new underwater acoustic equipment,cooperate with anti-submarine helicopters and other weapons for sea training,and adapt to the future development needs of passive sonar detection equipment,it is of great significance to develop a new underwater acoustic radiation simulation system.Underwater acoustic target radiated noise simulation system research is based on the research of underwater acoustic target radiated noise characteristics,and a mathematical model suitable for theoretical research and engineering applications is established.Using the theoretically studied mathematical model of target radiated noise,combined with the actual situation in engineering applications,a simulator hardware platform was developed to replace the target radiated noise.In summary,the paper studies the following aspects:1.Study the mathematical model of underwater acoustic radiation noise,analyze the generation mechanism and spectrum characteristics of radiation noise,and combine with software simulation to propose a hardware simulation scheme for underwater acoustic radiation radiation suitable for single emission transducers.2.Improve the traditional architecture and develop a separate architecture for the storage launch simulator(upper computer and lower computer).The upper computer collects the latest data from an external storage device.The lower computer receives and stores the data.After entering the water,the lower computer transmits the target analog sound signal.The new architecture changes the traditional single-hardware decoding to software extraction and hardware decoding to reduce costs;develop the USB_OTG function of the ARM main control chip to improve data transmission speed;design three working modes for the amphibious working environment of the simulator to cooperate with each other to improve work efficiency;Design magnetic holding circuit can automatically switch working mode according to working environment,simplify human-computer interaction and increase timeliness.3.Based on the simulator architecture,the hardware system is divided into: humancomputer interaction circuit,data acquisition and storage circuit,analog output circuit,sound source level adjustment circuit,power amplifier circuit,transducer matching circuit.Complete the circuit schematic design,PCB production and power-on debugging of each module.4.Complete the design and implementation of the simulator software system on the basis of the hardware system.The upper computer software collects human-computer interaction information and completes data communication and verification with the lower computer software.The lower computer completes the simulation of target radiated noise and realizes the core functions of the simulator.Test and analyze the main functions of the software system,and conduct system joint debugging to ensure that the basic functions of the simulator are realized.5.Perform the simulator system performance test in the silencing pool to evaluate the function and performance of the target simulator.6.Finally,summarize the research work done in this article,correct the deficiencies,and look forward to future work.