| 基于随机共振原理的低频弱信号检测方法研究 |
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| 引用本文： | 田红梅,沈媚娜. 基于随机共振原理的低频弱信号检测方法研究[J]. 杭州电子科技大学学报, 2014, 0(4): 106-110 |
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| 作者姓名： | 田红梅 沈媚娜 |
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| 作者单位： | 杭州电子科技大学机械工程学院,浙江杭州310018 |
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| 基金项目： | 国家自然科学基金资助项目（50875070） |
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| 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。
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| 关 键 词： | 双稳系统 随机共振 低频率 参数变换 |
Study of Weak Low-frequency Signal Detection Based on Stochastic Resonance |
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| Tian Hongmei,Shen Meina. Study of Weak Low-frequency Signal Detection Based on Stochastic Resonance[J]. Journal of Hangzhou Dianzi University, 2014, 0(4): 106-110 |
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| Authors: | Tian Hongmei Shen Meina |
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| Affiliation: | (School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou Zhejiang 310018, China) |
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| Abstract: | 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. |
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| Keywords: | bistable system stochastic resonance weak low-frequency parameter transformation |
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