不同类型噪声作用下的随机共振

在对随机共振研究中,当系统参数和信号一定时,主要讨论白噪声对共振特性的影响,但是在实际系统中存在的噪声并非理想白噪声。为了更真实的反应实际系统,本文针对双稳系统,分别讨论了限带白噪声、窄带白噪声、高频白噪声、高次谐波作用下的随机共振特性。信号设定的频率为0.01Hz,所加噪声为理想白噪声,其频率范围为0～2.5Hz。仿真结果表明,双稳系统发生随机共振不仅与系统参数、信号幅度、噪声强度有关,而且与噪声的频谱分布有关。本文的结论拓展了随机共振的研究范围,对其应用有一定实际意义。

Stochastic Resonance with Different Types of Noise

In the previous studies we mainly discuss the stochastic resonance with white noise when the system parameters and signals are certain.But in the real systems there is not ideal white noise.In this paper we discuss the stochastic resonance with limit band white noise,narrow band white noise,high frequency white noise,ultraharmonics,respectively.Simulation results show that stochastic resonance correlates not only with the system parameters,signal amplitude,noise level,but also with the noise spectrum distri...