Abstract
This paper studies the phenomenon of stochastic resonance (SR) in a bistable system with time delay driven by trichotomous noise. Firstly, a method of numerical simulation for trichotomous noise is presented and its accuracy is checked using normalized autocorrelation function. Then the effects of feedback strength and time delay on the system responses and signal-to-noise ratio (SNR) are studied. The results show that negative feedback strength is more beneficial than positive to promote SR. The effect of time delay on SR is related to the value of feedback strength. The influence of the signal amplitude and frequency on SR is also investigated. It is found that large amplitude and small frequency of the signal can promote the occurrence of SR. Finally, the influence of the amplitude and stationary probability of trichotomous noise on SNR are discussed.
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Acknowledgments
The authors would like to thank Saleem Riaz of Northwestern Polytechnical University, China, for valuable discussions. Bingchang Zhou’s contribution was supported by National Natural Science Foundation of China (Grant No. 11102155).
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Zhou, B., Lin, D. Stochastic resonance in a time-delayed bistable system driven by trichotomous noise. Indian J Phys 91, 299–307 (2017). https://doi.org/10.1007/s12648-016-0925-7
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DOI: https://doi.org/10.1007/s12648-016-0925-7