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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 6    December 2001

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Quality assurance expert system for car cylinder casting
LIANG Wei-zhong(梁维中)1, ZHANG Li(张  莉)1, MA Xu-liang(马旭梁)1,
LIU Hong-de(刘洪德)2, ZHOU Xiu-hua(周秀华)3

1. School of Metal Materials, Harbin University of Science and Technology,
Harbin 150040, P.R.China;
2. Harbin Dongan Autoengine JointStock Co.ltd, Harbin 150066, P.R.China;
3. Harbin Beer Co.ltd, Harbin 150030, P.R.China

Abstract: A quality assurance expert system, ZJSYS, has been developed for car cylinder casting by use of artificial intelligence technology and C++ for windows. The important feature of this expert system is that it draws not only qualitative conclusions but also quantitative ones in the therapy of defects. ZJSYS uses an expert reasoning strategy based on the rule models with the certainty factor. Reasoning strategy combines forward chaining and backward chaining together to perform qualitative analysis of defects. Meanwhile quantitative analysis of defects is completed by use of mathematical statistics and the principle of optimum. Management system that possesses the functions of adding, modifying and deleting was developed in knowledge base. To meet the practical requirements, the management model of data storage and statistics were developed. Actual run of ZJSYS showed that it played a significant role in improving product quality and reduce rejection ratio.

 

Key words:  cylinder casting; quality assurance; expert system

ISSN 1672-7029
CN 43-1423/U

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