水声时变线谱建模与双稳态随机共振分析

建立了水声时变线谱的模型,将双稳态随机共振系统应用于水声时变线谱信号的检测,考查了随机共振系统对水声环境的适应能力,提出了设计水声线谱检测系统可以利用的外在参数。在信噪比变化、声压起伏、线谱漂移等情况下,仿真结果表明双稳态随机共振系统都能较好地工作。为水声领域新型线谱检测系统的设计提供了依据。

Bistable stochastic resonance analysis for time-varying underwater acoustic line-spectrum detection

Time-varying line-spectrum model of the hydrophone end is designed.Bistable stochastic resonance method is proposed for the detection of time-varying underwater acous- tic line-spectrum detection and the parameters which can be used in the detection system are presented.Based on the proposed method,the adaptive capability of the stochastic res- onance detection system to underwater environment is examined.In circumstances like var- ying SNR,fluctuating acoustic pressure and excursive frequency,numerical simulation shows that the detection system works well.This study offers basis for the design of a new type line-spectrum detection instrument in the underwater acoustic domain.