双频信号作用下耦合双稳系统的双共振特性

两个单一双稳系统经非线性耦合而成为耦合系统，将其中一个双稳系统当作参数固定的被控系统，而另一个则作为参数可调的控制系统，通过调节耦合系数和控制系统的参数能产生随机共振.给控制系统外加单一频率信号，改变其频率大小能使控制系统产生共振.由于耦合的作用，控制系统的共振将影响被控系统的随机共振，从而在耦合系统中形式双共振现象，实现了用一个共振去影响另一个共振，并能使被控系统的随机共振更加强烈.经计算机仿真证实了它的有效性. 关键词： 耦合系统 双频信号 随机共振 双共振

The dual-resonance characteristic of coupled bistable system affected by two-frequency signal

Two single bistable systems were constituted into a coupling system by means of nonlinear coupling. One of the bistable systems was considered as controlled system with fixed parameters, and the other as control system with adjustable parameters. Adjusting the coupling coefficients and parameters of the control system can produce stochastic resonance. With a single-frequency signal added to the control system, changing the signal frequency can produce the resonance. Due to the effect of coupling, the resonance of control system will affect the stochastic resonance of the controlled system, and the dual-resonance phenomenon happens in the coupled system, which realizes the usage of one resonance to influence another and make the stochastic resonance of controlled system more intense. This also has been verified using computer simulation.