Numerical analysis for the stochastic resonance of frequency modulation

The weak signal detection under heavy noise background by using random resonance technology was studied.Also,the method of modulated stochastic resonance was proposed,to realize that the weak periodic signal can be distinguished from the strong noise in case of big parameter.The simulating calculation results indicate that the method can form low frequency signal,the stochastic resonance is easily generated when the low frequency signal acts on the bistable system,the frequency of stochastic resonance is on low frequency range making the characteristics of weak fault signal obviously and easily to capture.