色噪声下多稳态随机共振的微弱信号检测方法

doi:10.16182/j.issn1004731x.joss.201809024

系统仿真学报 ›› 2018, Vol. 30 ›› Issue (9): 3420-3428.doi: 10.16182/j.issn1004731x.joss.201809024

色噪声下多稳态随机共振的微弱信号检测方法

张刚¹, 易甜¹, 贺利娜²

1.重庆邮电大学信号与信息处理重庆市重点实验室,重庆 400065;
2.重庆电子工程职业学院,重庆 401331

收稿日期:2017-01-03 出版日期:2018-09-10 发布日期:2019-01-08
作者简介:张刚(1976-),男,重庆,博士,副教授,研究方向为混沌保密通信、微弱信号检测。
基金资助:
国家自然科学基金(61671095,61371164,61275099),重庆市教育委员会科研项目(KJ1600427,KJ1600429)

Detection Method of Weak Signal with Multi-stable Stochastic Resonance Under Color Noise

Zhang Gang¹, Yi Tian¹, He Li’na²

1.Chongqing Key Laboratory of Signal and Information Processing, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;
2. Chongqing College of Electronic Engineering, Chongqing 401331, China

Received:2017-01-03 Online:2018-09-10 Published:2019-01-08

摘要/Abstract

摘要： 将与实际更为接近的色噪声和多稳态随机共振系统相结合,采用信噪比增益作为测度指标,对多稳态随机共振特性进行了深入的研究。采用自适应的方法探究了色噪声下多稳态随机共振的系统参数a,b,c以及噪声放大系数对信噪比增益和系统输出的影响。进一步研究了多稳态随机共振对不同信号的检测性能。将多稳态系统应用于轴承故障诊断。实验结果表明：多稳态系统对微弱信号模型具有良好的检测效果,单频信号信噪比为-20 dB情况下有12 dB的提高。

关键词: 多稳态系统, 色噪声, 自适应, 随机共振, 信噪比增益

Abstract: The color noise is combined with a multi-stable stochastic resonance system. The characteristics of stochastic resonance in multi-stable system are analyzed deeply under color noise which is more close to reality, and the signal-to-noise ratio gain is regarded as the measurement index. The self-adaptive method is used to study multi-stable stochastic resonance system parameters a, b, c and intensity amplification facto D on the resonant output. Based on the above analysis, different signals are detected. Multi-stable system is applied in rolling bearing fault diagnosis. Experimental results demonstrate that the parameters induced multi-stable system has significant detection effect on weak signals, and the SNR of single frequency signal can increase 12 dB in the case of SNR of -20 dB.

Key words: multi-stable system, color noise, self-adaptive methods, stochastic resonance, signal-to-noise ratio gain

中图分类号:

TP391

张刚, 易甜, 贺利娜. 色噪声下多稳态随机共振的微弱信号检测方法[J]. 系统仿真学报, 2018, 30(9): 3420-3428.

Zhang Gang, Yi Tian, He Li’na. Detection Method of Weak Signal with Multi-stable Stochastic Resonance Under Color Noise[J]. Journal of System Simulation, 2018, 30(9): 3420-3428.

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色噪声下多稳态随机共振的微弱信号检测方法

Detection Method of Weak Signal with Multi-stable Stochastic Resonance Under Color Noise

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