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中国管理科学 ›› 2024, Vol. 32 ›› Issue (3): 299-312.doi: 10.16381/j.cnki.issn1003-207x.2023.0396

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基于相对熵的质量异常模式识别研究

鲁惠文,方兴华(),宋明顺,邓钰佳,黄佳   

  1. 中国计量大学经济与管理学院,浙江 杭州 310018
  • 收稿日期:2023-03-11 修回日期:2023-06-21 出版日期:2024-03-25 发布日期:2024-03-25
  • 通讯作者: 方兴华 E-mail:xinghuafang@cjlu.edu.cn
  • 基金资助:
    国家自然科学基金项目(71801202);教育部人文社会科学研究青年项目(22YJC630022);浙江省基本科研业务费项目(2022YW29)

Quality Abnormal Pattern Recognition Based on Relative Entropy

Huiwen Lu,Xinghua Fang(),Mingshun Song,Yujia Deng,Jia Huang   

  1. School of Economic and Management,China Jiliang University,Hangzhou 310018,China
  • Received:2023-03-11 Revised:2023-06-21 Online:2024-03-25 Published:2024-03-25
  • Contact: Xinghua Fang E-mail:xinghuafang@cjlu.edu.cn

摘要:

连续大规模生产不仅要求企业能更准确高效地识别生产过程状态,还需要识别生产过程中潜在的质量问题,从而提前规避质量风险。现有控制图方法能监测短期内生产过程是否处于异常状态,但难以对长期生产过程潜在的质量问题进行识别和分析。为了突破这一局限,本文提出在过程控制中运用基于相对熵的方法对质量数据分布形态进行识别,通过识别质量异常模式来分析潜在的质量问题。首先,通过仿真生成五种分布模式训练集和测试集;其次,将测试集样本质量特性值的概率分布或经核密度估计拟合后的概率密度作为模型输入;最后,通过构建的相对熵函数来量化抽样样本分布与各典型质量异常模式分布的相似性和差异性,输出生产状态分类指标,并通过两个质量模式判断准则完成模式识别。仿真结果表明,本文提出的方法在质量特性值为离散和连续情况下均能对质量异常分布模式进行有效识别。通过与同类方法进行对比,发现本文方法具有更高的识别精度,可以更有效地监控和识别生产过程的质量异常。

关键词: 相对熵, 核密度估计, 异常模式识别, 质量控制

Abstract:

Continuous mass production not only requires enterprises to identify the state of the production process more accurately and efficiently, but also needs to identify potential quality problems in the production process, so as to avoid quality risks in advance. The existing control chart abnormal pattern recognition method can monitor whether the production process is abnormal in the short term, but it is difficult to identify and analyze the potential quality problems in the long-term production process. In order to overcome this limitation, this study proposes a method, using relative entropy to identify the quality problems through distribution pattern. Firstly, five training sets and test sets of distribution anomaly patterns are generated by simulation. Then, the probability distribution of the mass characteristic values of the samples under the test set or the probability density after fitting by kernel density estimation is used as the input of the model. Finally, the relative entropy is used to quantify the similarity and divergences between the distribution of the actual production sample and each distribution of the estimated abnormal pattern, the production state classification index is output, and further pattern recognition is completed by constructing two quality pattern judgement criteria. It is shown that the proposed method in this paper can accurately identify the abnormal quality patterns in both the discrete and continuous states of the quality characteristic parameters. Through comparative analysis with the correlation method, it is found that our method has a higher classification accuracy, and thus it can recognition the quality abnormal pattern of the process more effectively.

Key words: relative entropy, kernel density estimation, quality abnormal pattern recognition, quality control

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