级联双稳系统随机共振的加强

该文研究了随机共振下的级联双稳系统加入周期与系统粒子在单势阱中波动的时间尺度相匹配的第二驱动信号后引起的效应.通过simulink设计模拟系统并进行仿真,观察级联系统每一级系统都加入第二驱动周期信号与未加前后输出信号x2频谱幅值的变化.结果表明,第二驱动周期信号能够增强级联双稳系统随机共振的效果.本文还分析了第一级加入驱动信号后输出信号频谱涨幅程度大于次级加入驱动信号后涨幅程度的原因,并给出了第二驱动周期信号有效控制加强随机共振的条件.

Reinforcement of stochastic resonance in cascaded bistable system

This paper studied the effects induced by adding the second driven periodic signal,the time scales of which match that of the intrawell fluctuations,into cascaded bistable system under stochastic resonance.Based on the model system designed by simulink and simulation experiment,we can observe the change of spectrum amplitude of the output signal x2 by comparing cascaded bistable system with the second driven signal in each level and without it.The result shows that the second driven signal can enhance the effect of stochastic resonance of cascaded bistable system.It also analyzed the reason why the increase after adding the second signal into the first cascaded system is higher than the one after adding driven signal into the sub-cascaded system.And it specified the qualification for how the second driven signal can control the stochastic resonance efficiently.