摘要
针对滚动轴承早期故障信号十分微弱的问题,提出采用Duffing混沌振子对故障微弱信号进行检测的方法。对Duffing方程进行改进,实现对任意频率微弱信号的检测。分析微弱周期信号相位角对检测系统的影响,提出采用多相位混沌振子阵列来消除微弱周期信号相位角对检测系统的影响。通过仿真实验,确定检测系统由3个混沌振子构成。使用该检测系统成功检测出轴承外圈故障微弱信号,相比传统的混沌振子检测系统,缩小了检测盲区,提高了检测信噪比。
Aiming at the problem that the early fault signal of rolling bearing is very weak, a method of detecting weak fault signal by using Duffing chaotic oscillator is proposed. The Duffing equation is improved, which is used to detect weak signals at any frequency. The influence of the phase angle of the weak periodic signal on the detection system is analyzed, and it is proposed that a multi-phase chaotic oscillator array is used to eliminate the influence of the weak periodic signal phase angle on the detection system. Through simulation experiments, it is determined that the detection system consists of 3 chaotic oscillators. The detection system is used to successfully detect the weak signal of the bearing outer ring. Compared with the detection system consisting of the traditional chaotic oscillator, this system can be used to effectively reduce the detection blind area and greatly improve the detection signal-to-noise ratio.
作者
刘彬
戴焕云
LIU Bin;DAI Huanyun(State-Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China)
出处
《机械制造与自动化》
2019年第4期173-175,191,共4页
Machine Building & Automation
基金
国家重点研发计划资助(2016YFB1200506)
科技支撑计划(2015BAG13B01-03)
牵引动力国家重点实验室自主课题(2015TPL_Z03)
