Graduate Thesis Or Dissertation
 

A methodology for using simulation to create manufacturing control expert knowledge

Pubblico Deposited

Contenuto scaricabile

Scarica il pdf
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/dj52w9158

Descriptions

Attribute NameValues
Creator
Abstract
  • Expert systems is an area of artificial intelligence that shows promise for a wide variety of applications, particularly in solving problems that have always been considered too large and complex for solution by conventional approaches. However, the process of eliciting expertise from an expert, knowledge acquisition, is recognized as the principal bottleneck in expert system development. This research explores the use of simulation for identifying knowledge for expert systems. With its capability for allowing experimentation on a model of a real system, computer simulation can be used to search for the best knowledge (strategies, constraints, scenarios, etc.), from among a set of alternatives, that optimizes system performance. Although developing high-level abstractions for decision schema that would be applicable to a large set of problem domains is desirable, it is extremely difficult. The focus of this study is the sawmill industry. A moderately complex and typical sawmill simulation system is modeled and used as a basis for developing a knowledge base to improve the material flow for the sawmill. The system components included in the system model are the bucksaw, debarker, headrig, gangsaw, flitch edger, and resaw. The inputs to the system are raw material mix, order file, product price, and operating times. The expert system's knowledge base is a set of operating policies which relate the constraints and actions in the form of production rules. Factors considered in the knowledge base involve material flow, machine breakdowns, queue capacities, and alternative routings. The methodology of using simulation for identifying knowledge for expert systems is developed. Simulation experiments are conducted and rules are generated based on the simulation system performance. The rules are recorded in an initial knowledge base and tested for interaction effects. Every combination of rules in the initial knowledge base is checked for its ability to improve the system performance using analysis of variance. A combination of rules that improves the system performance the best is selected as the final knowledge base.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Dichiarazione dei diritti
Publisher
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome) using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces

Le relazioni

Parents:

This work has no parents.

In Collection:

Elementi

Thumbnail Titolo Data caricata Visibilità Azioni
file details HendraRichardC1996.pdf 2017-10-19 Pubblico Scaricare