双稳态系统中结构参数对系统性能的影响

针对微弱信号检测问题,介绍了随机共振的原理并系统地分析了双稳系统阈值与系统结构参数的关系。得出系统中结构参数对随机共振现象发生起决定性作用的结论。同时深入阐述非线性系统势垒对随机共振效应的影响,即势垒越高,产生协同效应要求信号和噪声的能量越大。反之,则越小。基于以上结论,通过自适应地调节结构参数使系统达到随机共振,将能够适应更大的频率范围变化,提高随机共振方法检测效果。

Effects of structure parameters on the bistable system performance

Aiming at the problem of weak signal detection, this paper introduces the principle of stochastic resonance and systematically analyses the relationship between the bistable system threshold and system structure parameters. It is concluded that the structure parameters play a decisive role in the stochastic resonance phenomenon. Also this paper analyses the effect of potential barrier in nonlinear systems. The greater the potential barrier, the higher the energy demand of both signal and noise to have synergistic effects. Based on the conclusions above, we can bring the system to stochastic resonance through adaptive to adjust structure parameters, and that is able to adapt to greater frequency range change, which can also improve the detection effect of the stochastic resonance method.