Passive Detection of Undersea Vehicle Acoustic Fuze Based on Energy Variation
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摘要: 针对水下航行器对运动目标拦截末程声引信实时有效检测问题, 利用水下航行器所接收目标的辐射噪声能量快速变化特性, 提出了一种水下航行器声引信被动检测方法。通过快速傅里叶变换对接收的目标辐射噪声进行转换, 在频域实现频带内能量计算, 得到信号能量变化曲线, 利用设计的滤波器对能量曲线进行平滑处理, 并计算曲线斜率。仿真分析与实测数据处理结果表明, 信号能量曲线斜率能有效地反映水下航行器与目标交汇过程中声引信接收噪声的能量变化特点, 可以作为交汇最短距离和引信输出最佳时刻的重要判据。Abstract: Aiming at the problem of real-time and effective detection of an acoustic fuze at the end of the intersection between an undersea vehicle and a moving target, a passive detection of acoustic fuze for undersea vehicles was presented, which used the fast-changing energy characteristics of the received noise radiated by target. The noise received by the undersea vehicle acoustic fuze was converted using the fast Fourier transform(FFT), and the energy of the noise in the working frequency band was calculated to obtain the signal energy changing curve. Finally, the energy curve was smoothed by the designed filter, and the slope of the curve was calculated. The results of the simulation and processing of the measured data showed that the slope of the signal energy curve can effectively reflect the energy change characteristics of the noise received by the acoustic fuze in the intersection process between the undersea vehicle and moving target, and the slope of the signal energy curve can be used as an important criterion for the shortest distance between the undersea vehicle and moving target and the best time for acoustic fuze to give out an action signal.
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Key words:
- undersea vehicle /
- acoustic fuze /
- passive detection /
- radiated noise /
- slop
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