School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
Chaos. 2013 Sep;23(3):033117. doi: 10.1063/1.4816397.
We investigated the characteristics of the output saturation of the classical continuous bistable system (saturation bistable system) and its impact on stochastic resonance (SR). We further proposed a piecewise bistable SR system (unsaturated bistable system) and developed the expression of signal-to-noise ratio (SNR) using the adiabatic approximation theory. Compared with the saturation bistable system, the SNR is significantly improved in our unsaturated bistable SR system. The numerical simulation showed that the unsaturated bistable system performed better in extracting weak signals from strong background noise than the saturation bistable system.
我们研究了经典连续双稳系统（饱和双稳系统）输出饱和的特点及其对随机共振（SR）的影响。我们进一步提出了分段双稳 SR 系统（不饱和双稳系统），并使用绝热近似理论推导出了信噪比（SNR）的表达式。与饱和双稳系统相比，我们的不饱和双稳 SR 系统的 SNR 得到了显著提高。数值模拟表明，不饱和双稳系统在从强背景噪声中提取弱信号方面比饱和双稳系统表现更好。
