matlab怎样做单值spc,统计过程控制_spc_及MATLAB实现_宋景涛.pdf

统计过程控制_spc_及MATLAB实现_宋景涛

理 论 与 实 践 质 量 工 程 卷

Quality Engineering

T

h

e

o

r

y 统计过程控制(spc)及MATLAB实现

& Statistical Process Control Based on MATLAB

P 宋景涛,方明霞 Song Jing-tou,Fang Ming-xia

r

( School of Aerospace Engineering and Applied Mechanics

a

(同济大学航空航天与

of Tongji University Shanghai 200233,China)

,

c

力学学院,上海 200233)

t

i

c

e 摘 要:统计过程控制是利用统计技术来控制生产过程。本文对MATLAB实现SPC X-R 图作了介

s

绍。并基于MATLAB对控制图中各种失控情况的判定方面进行了探讨。针对统计过程中的

‘周期性’的判定问题，提出了利用快速傅里叶变换，根据功率谱密度来判断的方法。

关键词:统计过程控制;X-R图;快速傅里叶变换;周期性;功率谱密度

中图分类号:TB114 文献标识码:A 文章编码:1003-0107(2007)06-0040-05

40 Abstract:Statistical Process Control is a method to control production procedures by statistical

techniques. This paper gives a brief introduction on how to use MATLAB to practice SPC X-R chart,

and carry out research studies on how to determine various cases out of control. In order to determine

periodicity in production process, it introduces a mathematical solution which is to determine periodicity

by FFT and PSD.

Key words: ; ; ( )