随机参数诱导交流积分器中的随机共振研究

Stochastic resonance induced by random parameter in an alternating-current integrator

研究了具有随机参数的交流积分器中的随机共振现象。基于线性系统理论,得到了系统输出信噪比的表达式。研究发现,输出信噪比是噪声强度、噪声相关率以及系统参数的非单调函数。信噪比随着激励信号频率的增大而增大,随着信号直流分量的增大而减小。

The phenomenon of stochastic resonance in an alternating-current integrator with random parameter was investigated.The explicit expression of the output signal-to-noise ratio (SNR) of the system was obtained based on linear system theory.It is shown that the SNR is a non-monotonic function of the intensity and correlation rate of the noise as well as of the system parameters.The SNR increases with the increase of signal frequency,while it decreases with the increase of bias part of input signal.