Effects Induced by Adding the Second Driven Periodic Signal in Stochastic Resonance Cascaded Bistable System

摘要

This paper analyzes stochastic resonance in single potential and transitions between two potential. It exists a second driven signal which the time scales matches the intrawell fluctuations. According to the simulation in matlab we can find the change of frequency amplitude of the outputsignal by comparing cascaded bistable system with the second driven signal in each level or without it. The effects of stochastic resonance based on cascaded bistable system can be increased by adding the second driven periodic signal; this paper also discusses the reason that the intensityenhancement after adding the second signal into the first cascaded system is higher than the enhancement after adding driven signal into the sub-cascaded system