Stochastic resonance and its application by the control of an additional periodic signal

The relationship between the parameters of additional periodic signal and the Kramers rate of the bistable system was analyzed.The analysis revealed that the additional periodic signal had influence on stochastic resonance effect of weak periodic signal by adjusting the Kramers rate and purposely produce stochastic resonance or make stochastic resonance more intense.Therefore,the control of stochastic resonance can be realized.The simulation and experiment results showed that the spectral power of output at the weak periodic signal frequency is increased by stochastic resonance controlled by additional periodic signal and the weak signal is detected from strong noise.It is feasible and effective in application of detecting vortex shedding frequency.