中文摘要：

介绍了双稳系统,讨论了产生随机共振的条件以及输出频谱的特性。针对原双稳系统不能检测中低频率信号的问题,利用参数变换原理,推导出了一种新的模型,阐述与分析了该模型的参数变化对输出混合信号的影响。模型相对于经典双稳系统模型降低了对输入的要求。

英文摘要：

This paper introduces the bistable system, and investigates the conditions of producing stochastic resonance and the characteristics of the output spectrum. Aiming at detecting the weak low-frequency signal with the primary bistable system inability, a new model is derived based on the proposed parameter transformation, and the changes of the mixed-signal output caused by changing the model parameters are described and analyzed. The model reduces the required of the input signals with respect to the classical bistable system model.