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Encore: an object-oriented knowledge-based system for transformer design1

Published online by Cambridge University Press:  27 February 2009

J. H. Garrett Jr  and
A. Jain
J. H. Garrett Jr
Affiliation:
Department of Civil Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, U.S.A.
A. Jain
Affiliation:
Information Sciences Research, BP America, Cleveland, OH 44128, U.S.A.
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Abstract

The design of electronic power transformers is an activity that requires the application of well-established algorithms from electromagnetic theory and heuristic, judgmental techniques derived from experience in the design and manufacturing of these devices. This paper describes an object-oriented knowledge-based system, Encore, that was developed at Houston Downhole Sensors (a division of Schlumberger Well Services). Encore combines object-oriented, rule-based, and procedural programming techniques to design 60 Hz power transformers. The system uses a heuristic search strategy to generate design alternatives, and then selects the “best” design based on size and efficiency considerations The heuristics are represented and applied as rules; the electromagnetic components are modelled as frame-like objects. The object-oriented nature of this system facilitated enhancements; by specializing some of the objects comprising a power transformer, a power inductor model was quickly developed. Encore reduces design time from a couple of days to less than an hour; it is being used to design the transformers and inductors of power supplies in new Schlumberger well-logging tools. The system was implemented on a Xerox interlisp Workstation using an object-oriented environment called STROBE.

Type
Practicum Paper
Information
AI EDAM , Volume 2 , Issue 2 , May 1988 , pp. 123 - 134
Copyright
Copyright © Cambridge University Press 1988

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