一阶线性系统随机共振在转子轴故障诊断中的应用研究

冷永刚;田祥友

振动与冲击 ›› 2014, Vol. 33 ›› Issue (17) : 1-5.

PDF(1724 KB)
PDF(1724 KB)
振动与冲击 ›› 2014, Vol. 33 ›› Issue (17) : 1-5.
论文

一阶线性系统随机共振在转子轴故障诊断中的应用研究

  • 冷永刚1,2,田祥友1
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Application of First-order linear system’s Stochastic ResonanceIn Fault Diagnosis of Rotor Shaft

  • Leng Yong-gang1,2, Tian Xiang-you1
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文章历史 +

摘要

针对机械系统早期微弱故障信号难识别诊断问题,提出一阶线性系统调参广义随机共振的特征提取方法,该方法基于调节一阶线性系统参数,可以得到信噪比取极大值的广义随机共振现象。为得到清晰的特征信号,以可辨识性为优化目标,给出了系统参数、信号频率、采样频率等参数之间的选择关系。滑动轴承试验台上转子轴的早期微弱故障模拟实验,验证了此方法的有效性。

Abstract

The extraction method of a signal’s frequency based on the parameter- adjusted stochastic resonance (SR) of first-order linear system in a broad sense is presented in this paper, which is aimed at recognizing the weak fault signal in early stage. This method makes use of the phenomenon that the output signal-to-noise ratio (SNR) will get a resonance peak by tuning the system’s parameter. To make characteristic signal more distinct, the paper explains how to choose the parameters among the system parameter, signal frequency and sampling rate targeted at the best signal recognition. Then the simulated rotor shaft’s early weak fault from test-bed of sliding bearing confirms the effectiveness of this method.

关键词

一阶线性系统 调参广义随机共振 微弱信号 故障诊断

Key words

first-order linear system / parameter-adjusted SR in a broad sense / weak signal / fault diagnosis

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导出引用
冷永刚;田祥友. 一阶线性系统随机共振在转子轴故障诊断中的应用研究[J]. 振动与冲击, 2014, 33(17): 1-5
Leng Yong-gang;Tian Xiang-you. Application of First-order linear system’s Stochastic ResonanceIn Fault Diagnosis of Rotor Shaft[J]. Journal of Vibration and Shock, 2014, 33(17): 1-5

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