双稳系统随机共振的反馈控制

将双稳系统的输出反馈到输入端再作用于系统，提出了采用反馈来控制随机共振的方法.以典型双稳系统为对象，并以信噪比和功率谱放大率作为度量随机共振效应的可观察变量，分别研究了采用线性或非线性反馈函数所产生的随机共振现象.理论分析和数值仿真结果表明随机共振是可控制的.该方法特别适用于系统参数固定或难以改变的系统. 关键词： 双稳系统 随机共振 反馈控制 共振效应

The feedback control of stochastic resonance in bistable system

A feedback method is proposed to control the stochastic resonance by feeding back the output of bistable system to the input to re-act on the system. In a typical bistable system， the signal-to-noise ratio and spectral power amplification are considered as observable variables to evaluate the stochastic resonance effect. The stochastic resonance phenomenon caused by the linear or nonlinear feedback functions are studied respectively. The theoretical analysis and numerical simulation show that the stochastic resonance is controllable， and this method is especially suitable to the system of which the parameters are fixed or difficult to vary.