频率调制随机共振的数值分析*

作者：张良斌 日期：2008-02-25/span> 浏览：3344 查看PDF文档

频率调制随机共振的数值分析*

张良斌
（襄樊学院 机械工程系，湖北 襄樊 441053）

摘要：对随机共振技术运用于强噪声背景下的弱信号检测进行了研究，提出了用频率调制的方法，实现了在大参数情况下从强噪声中检测微弱周期信号。数值计算结果表明，该方法可形成低频信号，该低频信号通过双稳系统易产生随机共振，能使微弱的故障信号特征突出、明显，易于捕捉。
关键词：随机共振；频率调制；疲劳点蚀
中图分类号：TM307文献标识码：A文章编号：1001-4551(2008)01-0004-03

Numerical analysis for the stochastic resonance of frequency modulation
ZHANG Liangbin
(Department of Mechanical Engineering, Xiangfan University, Xiangfan 441053, China)
Abstract: The weak signal detection under heavy noise background by using random resonance technology was studied. Also, the method of modulated stochastic resonance was proposed, to realize that the weak periodic signal can be distinguished from the strong noise in case of big parameter. The simulating calculation results indicate that the method can form low frequency signal, the stochastic resonance is easily generated when the low frequency signal acts on the bistable system, the frequency of stochastic resonance is on low frequency range making the characteristics of weak fault signal obviously and easily to capture.
Key words: stochastic resonance; frequency modulation; fatigue corrosive pitting

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