李宏坤   

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Language:English

Paper Publications

Title of Paper:改进Logistic回归模型的滚动轴承可靠性评估方法

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Date of Publication:2018-01-01

Journal:振动、测试与诊断

Included Journals:EI、CSCD

Volume:38

Issue:1

Page Number:123-129

ISSN No.:1004-6801

Key Words:可靠性评估;改进Logistic回归模型;故障诊断;滚动轴承

Abstract:为解决滚动轴承可靠性难以评估的问题,提出了一种基于改进Logistic回归模型(improved logistic regres-sion model,简称ILRM)的滚动轴承可靠性评估方法.首先,计算滚动轴承的时域、频域和时频域特征,选出有效特征组成相对高维特征集;其次,利用主元分析(principal component analysis,简称 PCA)选取贡献率大于95% 的主元,作为改进Logistics回归模型的协变量;最后,利用改进Logistic模型求取滚动轴承的可靠度并绘制可靠度曲线.该方法可以提取轴承退化的有效特征量;兼顾轴承的退化趋势,能够真实反映轴承的状态;消除信号随机波动对可靠度预测的影响.通过辛辛那提大学智能维护中心(intelligent maintenance systems,简称IMS)滚动轴承全寿命试验,验证了该方法的有效性.

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