可拓理论与SOM网络相结合的多故障诊断方法

doi:10.3981/j.issn.1000-7857.2014.34.008

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摘要针对采用SOM 网络进行多故障诊断时,要求多故障模式相似且不包含标准故障输出的限制,提出将SOM 网络与可拓理论相结合的多故障诊断方法.首先采用SOM 网络对训练样本进行聚类,得到故障模式及其聚类中心.然后针对每种故障模式的每个特征构造在聚类中心处取得最大值的关联函数,并以各特征的关联函数值为基础,设计多故障评价指标实现多故障诊断.最后采用汽轮发电机组振动信号的频谱数据对算法进行验证,结果表明该方法能够正确识别待诊断样本的单故障和多故障模式,具有可行性.

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	文天柱
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关键词 ：多故障诊断, SOM 网络, 可拓理论, 关联函数

Abstract：This paper proposes a multi-fault diagnosis algorithm combining SOM network with extension theory to meet the requirement that multi-fault modes should be similar and do not contain the standard fault output when SOM network is used for multi-fault diagnosis. First, the training samples are clustered by SOM network, and the fault modes and these clustering centers can be obtained. Second, the dependent function of each feature for each fault mode is set up where the maximum value can be obtained at the clustering center. Next, the evaluation index of multi-fault modes is designed for multi-fault diagnosis, which is based on the dependent function values of features. Finally, the spectrum data of vibration signal of steam turbine generator unit is adopted to verify the algorithm. The results show that both single-fault mode and multi-fault modes can be correctly distinguished by this method, so the algorithm is feasible.

Key words： multi-fault diagnosis SOM network extension theory dependent function

收稿日期: 2014-09-25

ZTFLH:

TP206.3

基金资助:"泰山学者"建设工程专项

作者简介: 文天柱,博士研究生,研究方向为复杂军用电子装备自动测试技术和智能故障诊断技术,电子信箱:wentianzhu1987@aliyun.com

引用本文:

文天柱, 许爱强, 陈育良. 可拓理论与SOM网络相结合的多故障诊断方法[J]. 科技导报, 2014, 32(34): 58-61.
WEN Tianzhu, XU Aiqiang, CHEN Yuliang. Multi-fault Diagnosis Method Based on Combination of Extension Theory and SOM Network. Science & Technology Review, 2014, 32(34): 58-61.

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http://www.kjdb.org/CN/10.3981/j.issn.1000-7857.2014.34.008 或 http://www.kjdb.org/CN/Y2014/V32/I34/58

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