基于统计过程控制的流程工业工艺规范制定方法

doi:10.3901/JME.2019.08.208

机械工程学报 ›› 2019, Vol. 55 ›› Issue (8): 208-215.doi: 10.3901/JME.2019.08.208

基于统计过程控制的流程工业工艺规范制定方法

徐钢^1,2, 张晓彤¹, 黎敏², 徐金梧²

1. 北京科技大学计算机通讯工程学院北京 100083;
2. 北京科技大学钢铁共性技术协同创新中心北京 100083

收稿日期:2018-06-25 修回日期:2018-11-20 出版日期:2019-04-20 发布日期:2019-04-20
通讯作者: 徐钢(通信作者),男,1980年出生,博士,助理研究员。主要研究方向产品质量建模与监控、信号处理与模式识别。E-mail:watermoon999@126.com
基金资助:
“十二五”国家科技支撑计划资助项目（2015BAF30B01）。

A Method of Establishing Process Specifications in Process Industry Based on Statistical Process Control

XU Gang^1,2, ZHANG Xiaotong¹, LI Min², XU Jinwu²

1. School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing 100083;
2. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083

Received:2018-06-25 Revised:2018-11-20 Online:2019-04-20 Published:2019-04-20

摘要/Abstract

摘要： 在冶金、化工等流程型工业领域，产品制造过程涉及多个连续相关的工序，每道工序需确定工艺参数的控制范围，即制定工艺规范。目前，流程工业在制定工艺规范时，主要采用6-Sigma方法或根据生产经验来确定每道工序关键工艺参数的范围。但是，这种基于独立同分布假设的6-Sigma方法，由于缺乏处理多重相关、非正态分布的能力，因此所制定的工艺规范在工业应用中容易造成产品质量的不稳定。为了解决流程工业在工艺规范制定过程中存在的这个难题，提出了基于多元统计分析原理的工艺规范制定方法。首先，引入了软超球体的概念，并采用非线性核函数的方法来确定软超球体在高维空间中的边界，即产品质量可控区的工艺参数边界。然后，寻求软超球体的最大内接矩形体，并依据最大内接矩形体来制定工艺规范。最后，结合IF钢生产实例，讨论了工艺规范制定的整个过程，验证了新方法的有效性。

关键词: 多元统计过程控制, 工艺规范, 流程工业, 软超球体

Abstract: In the field of process industry such as metallurgy and chemical industry, the manufacturing process of the product involves several continuous related processes. Each process needs to determine the control range of the process parameters, that is, the process specification is formulated. At present, the process industry mainly uses the 6-Sigma method or the production experience to determine the range of key process parameters in each process. However, the 6-Sigma method based on the assumption of independent distribution is lacking in the ability to deal with multiple correlation and non-normal distribution, so the process specification is easy to cause the instability of product quality in industrial application. In order to solve the problem existing in the process specification of the process industry, a method for formulating process specifications based on multivariate statistical analysis is proposed. First, the concept of soft hyper-sphere is introduced, and the method of nonlinear kernel function is used to determine the boundary of the soft hyper-sphere in the high dimensional space, that is the process parameter boundary of the product quality-controlled zone. Then, the largest inscribed form of the hyper-sphere is found out, and the process specification is formulated according to the largest inscribed rectangle. Finally, the example of IF steel production is conducted, and the formulation process of the process specification is discussed, so the effectiveness of the new method is verified.

Key words: multivariate statistical process control, process industries, process specifications, soft hyper-sphere

中图分类号:

TP277

徐钢, 张晓彤, 黎敏, 徐金梧. 基于统计过程控制的流程工业工艺规范制定方法[J]. 机械工程学报, 2019, 55(8): 208-215.

XU Gang, ZHANG Xiaotong, LI Min, XU Jinwu. A Method of Establishing Process Specifications in Process Industry Based on Statistical Process Control[J]. Journal of Mechanical Engineering, 2019, 55(8): 208-215.

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基于统计过程控制的流程工业工艺规范制定方法

A Method of Establishing Process Specifications in Process Industry Based on Statistical Process Control

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