基于调制随机共振的微弱信号检测研究

夏均忠;刘远宏;马宗坡;冷永刚;安相璧

振动与冲击 ›› 2012, Vol. 31 ›› Issue (3) : 132-135,.

PDF(1549 KB)
PDF(1549 KB)
振动与冲击 ›› 2012, Vol. 31 ›› Issue (3) : 132-135,.
论文

基于调制随机共振的微弱信号检测研究

  • 夏均忠 1,刘远宏 1,马宗坡 1,冷永刚 2,安相璧 1
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Research on Weak Signal Detection Based on the Modulated Stochastic Resonance

  • XIA jun-zhong 1,LIU yuan-hong 1,MA zong-po 1,LEN yong-gang 2,AN xiang-bi 1
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摘要

在工程信号处理过程中信号常超出随机共振绝热近似或线性响应理论的小参数要求而成为大参数信号。论文深入探讨非线性双稳系统随机共振发生机理和条件要求,将频率调制技术与随机共振理论相结合,提出用调制随机共振的方法实现随机共振理论在工程信号检测中的应用,进行了数值仿真分析证明其有效性,并将该方法应用于轴承内圈点蚀故障的检测

Abstract

In engineering signal processing, parameters of the signal often beyond the requirements of adiabatic approximation or linear response theory of stochastic resonance. The paper discusses the mechanism and condition requirements of stochastic resonance of nonlinear bistable system, and the frequency modulation combined with the theory of stochastic resonance. Modulated stochastic resonance is used to achieve weak signal detection in engineering applications, the numerical simulation is conducted to prove its effectiveness, and the method is also used to detect pitting corrosion of bearing inner race.

关键词

微弱信号检测 / 随机共振 / 双稳系统 / 频率调制

Key words

weak signal detection / stochastic resonance / bistable system / frequency modulation

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导出引用
夏均忠;刘远宏;马宗坡;冷永刚;安相璧 . 基于调制随机共振的微弱信号检测研究[J]. 振动与冲击, 2012, 31(3): 132-135,
XIA jun-zhong;LIU yuan-hong;MA zong-po;LEN yong-gang;AN xiang-bi . Research on Weak Signal Detection Based on the Modulated Stochastic Resonance[J]. Journal of Vibration and Shock, 2012, 31(3): 132-135,

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