Stochastic resonance in second-order and underdamped asymmetric bistable system

被引：22
|
作者：
Guo, Yong-Feng [1 ]
Shen, Ya-Jun [1 ]
Tan, Jian-Guo [1 ]
机构：
[1] Tianjin Polytech Univ, Sch Sci, Tianjin 300387, Peoples R China
来源：
MODERN PHYSICS LETTERS B | 2015年 / 29卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Stochastic resonance; second-order asymmetric bistable system; underdamped; noise; DRIVEN;
D O I：
10.1142/S0217984915500347
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The phenomenon of stochastic resonance (SR) in a second-order and underdamped asymmetric bistable system is investigated. The second-order asymmetric bistable system with Gauss white noise is stochastically equivalent to two-dimensional Markovian process, and the exact expression of the signal-to-noise ratio (SNR) of system response in the presence of weak periodic driving force is obtained under the adiabatic condition and the theory of two-state model intensities. The influences of the damping parameter, asymmetry constant r and the Gaussian white noises on the SNR are discussed. The present calculation results show that, the increase of static asymmetry r and damping parameter 7 can restrain the SR phenomenon appears. However, the increase of signal amplitude A can enhance SR.
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页数：8
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