论文标题
强大的多元功能控制图
Robust Multivariate Functional Control Chart
论文作者
论文摘要
在现代行业4.0应用程序中,在制造过程中获得了大量数据,这些数据通常以情况下的异常观察污染,形式是casewise和Cellwise Outlers的形式。这些可以严重降低控制图表程序的性能,尤其是在复杂和高维设置中。为了在个人资料监视的背景下减轻此问题,我们提出了一个新框架,称为强大的多元功能控制图(ROMFCC),该框架能够监视多元功能数据,同时既适合函数casewise和Cellwise Outliers又有强大的功能数据。 ROMFCC依赖于四个主要元素:(i)功能单变量过滤器来识别丢失的组件替换的功能性细胞离群值; (ii)一种鲁棒的多元功能数据推出缺失值的方法; (iii)案例稳健的维度降低; (iv)多元功能质量特征的监视策略。进行了一项广泛的蒙特卡洛模拟研究,以将ROMFCC与文献中已经出现的竞争监测方案进行比较。最后,提出了一项激励人心的研究,其中使用了拟议的框架来监视汽车行业中的阻力焊接过程。
In modern Industry 4.0 applications, a huge amount of data is acquired during manufacturing processes that are often contaminated with anomalous observations in the form of both casewise and cellwise outliers. These can seriously reduce the performance of control charting procedures, especially in complex and high-dimensional settings. To mitigate this issue in the context of profile monitoring, we propose a new framework, referred to as robust multivariate functional control chart (RoMFCC), that is able to monitor multivariate functional data while being robust to both functional casewise and cellwise outliers. The RoMFCC relies on four main elements: (I) a functional univariate filter to identify functional cellwise outliers to be replaced by missing components; (II) a robust multivariate functional data imputation method of missing values; (III) a casewise robust dimensionality reduction; (IV) a monitoring strategy for the multivariate functional quality characteristic. An extensive Monte Carlo simulation study is performed to compare the RoMFCC with competing monitoring schemes already appeared in the literature. Finally, a motivating real-case study is presented where the proposed framework is used to monitor a resistance spot welding process in the automotive industry.