摘要
将Langevin型双稳态随机共振系统应用于水声时变线谱信号的检测,提出了设计水声线谱检测系统可以利用的外在参数。在水听器端建立了时变线谱模型,考查了随机共振系统对水声环境的适应能力。实验发现在信噪比变化、声压起伏、线谱漂移等情况下,系统都能较好的工作,为水声领域新型线谱检测系统的设计提供了依据。
Langevin type bistable stochastic resonance method is proposed for the detection of time-varying underwater acoustic line-spectrum detection. The parameters which can be used in the detection system are also presented. Time-varying line-spectrum models from hydrophone end are designed. Based on the proposed method, the adaptive capability of the stochastic resonance detection system in underwater environment is examined. In circumstances like varying SNR, fluctuating acoustic pressure and frequency excursion, numerical tests show that the detection system works well. This research offers a basis for the design of new type line-spectrum instrument in underwater acoustic domain,
出处
《海军工程大学学报》
CAS
北大核心
2007年第3期76-80,共5页
Journal of Naval University of Engineering
关键词
水声信号
线谱检测
随机共振
underwater acoustic signal
line-spectrum detection
stochastic resonance
