基于振动共振的随机共振控制

Stochastic resonance control based on vibration resonance

分析了非线性双稳系统在高、低两种不同频率信号作用下的动力学特性,给出了高频信号参数与双稳系统输出信号的信噪比和功率谱放大率关系的解析表达式,提出了基于振动共振的随机共振控制方法.理论分析和数值仿真结果表明,通过调节高频信号的幅值或频率大小,能有效地控制双稳系统输出信号的信噪比和功率谱放大率.

The dynamic characteristics of the non-linear bistable system subject to the action of high and low frequency signals were analyzed.The analytic formulation of the relationship between the parameters of high frequency signals and the SNR,spectral power amplification（SPA）of the bistable system output was presented.The stochastic resonance control method based on vibration resonance was proposed.The theoretical analysis and numerical simulation showed that the SNR and SPA of output signal of the bistable system can be controlled effectively by adjusting the amplitude and frequency of the high frequency signal.