基于大能量火花放电的枪声模拟系统设计*

为准确模拟某型枪械实弹射击枪声,设计了一种基于大能量火花放电的枪声模拟系统,理论分析和仿真验证了系统工作原理,并对所模拟枪声的声级以及时域和频域特性进行了试验测试。仿真和测试结果表明:点火电容放电所辐射的电场击穿高能电极空气间隙,可有效控制储能电容组火花放电模拟枪声;模拟与真实枪声的声级误差约为-2.1~5.8 d B(A),标准差为1.974 dB(A),模拟与真实枪声的时域信号随时间增加均以指数形式迅速减小且频谱分布规律一致;模拟与真实枪声信号在时域进行相关运算后存在着明显的相关峰,二者有较好的相似性。

Design of simulated gun-shot sound system based on large energy spark discharge

In order to accurately simulate the shot sound of the gun firing, a simulated shot sound system based on large energy spark discharge was designed. The operational principle of the system was theoretically analyzed and simulation verified, then the sound level, time-domain and frequency-domain characteristics of the simulated gunshot sound are tested. The simulation and test results show that: (1) The electric field radiated by ignition capacitor discharge can break through the air gap of high energy electrode, then it can effectively control the spark discharge of energy storage capacitors which simulating gunshot sound. (2) The error of sound level between simulated and real gunshot is - 2.1~5.8 dBA, and the standard deviation is 1.974 dBA. The time -domain signals of simulated and real gunshot decreases exponentially with time increasing and the spectrum distribution of the two signals is consistent. (3) There is obvious correlation peaks in the correlation calculation of the two signals in time domain, and the simulated gunshot sound is basically consistent with the real gunshot sound.