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针对航空制造企业产品特点,分别对多元单值T2控制图和MEWMA控制图进行分析并改进,改变其协方差的计算方法,强调两种控制图在控制用阶段的使用方法与功能,将两者合并起来共同监控航空制造企业的生产加工过程。通过使用航空制造企业生产中的一部分数据验证共同使用两种控制图的准确性与有效性,从而为降低质量成本提供依据。
According to the product characteristics of aeronautic manufacturing enterprises, we analyzed and improved multivariate singular value T2 control charts and MEWMA control charts, respectively, and changed their calculation methods of covariance. Emphasis was put on the use and function of the two control charts in the control phase. Together to jointly monitor the aviation manufacturing enterprises in the production and processing. By using part of the data in the production of aeronautical manufacturing enterprises to verify the accuracy and validity of using both control charts together, the basis for reducing the quality cost is provided.