A method for early weak fault detection and diagnosis of rolling bearing
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摘要:
针对现有方法难以及时检测与诊断滚动轴承早期微弱故障的难题,提出一种滚动轴承早期微弱故障检测与诊断方法。基于基尼指数提取滚动轴承全寿命数据振动信号的特征指标,对轴承早期微弱故障进行及时检测;其次,基于增强奇异谱分解+蜜獾算法优化最大相关峭度解卷积的方法对轴承早期微弱故障振动信号进行有效分解,最大相关峭度解卷积降噪和凸显故障冲击效果性能,对滚动轴承早期微弱故障进行有效诊断。使用辛辛那提滚动轴承全寿命数据集进行试验,并将所提方法与传统的振动峰-峰值和有效值检测方法进行对比,该方法能够分别提前1 700 min和30 min检测并诊断出滚动轴承发生早期微弱故障。
Abstract:A method for detection and diagnosis of early weak faults in rolling bearings was proposed. It addressed the challenge of timely detection using existing methods. The method utilized the Gini index to extract feature indicators from the complete life cycle data of rolling bearings, enabling timely detection of early weak faults. Additionally, it applied enhanced singular spectral decomposition and the honey badger algorithm to optimize the maximum correlated kurtosis deconvolution method for effectively decomposing early weak fault signals in rolling bearings, maximizing noise reduction and highlighting fault impact, and enabling effective diagnosis of early weak faults in rolling bearings. Tests using the Cincinnati rolling bearing lifespan dataset demonstrated that the proposed method can detect and diagnose early weak faults in rolling bearings with a lead time of
1700 minutes and 30 minutes, respectively. -
表 1 仿真信号能量
Table 1. Simulation signal energy
信号 y1(t) y2(t) y3(t) y4(t) y(t) 能量 0.0006238 0.4947 0.4947 0.0099 1.0000 表 2 滚动轴承参数
Table 2. Rolling bearing parameters
型号 节径/mm 滚子
直径/mm滚子数 接触角/rad ZA-2115 71.5 8.4 16 0.2648 表 3 5种方法的早期故障检测结果
Table 3. Early fault detection results of five methods
指标
方法轴承早期故障
起始时间/min预警
情况实际检测故障
起始时间/min脉冲指标 5300 无 7000 峭度 5300 无 7000 峰-峰值 5300 无 7000 有效值 5300 无 5330 本文方法 5300 有 5300 -
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