Accession Number : ADA131859

Title :   Using Structural and Functional Information in Diagnostic Design.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE ARTIFICIAL INTELLIGENCE LAB

Personal Author(s) : Hamscher,Walter

PDF Url : ADA131859

Report Date : Jun 1983

Pagination or Media Count : 70

Abstract : We wish to design a diagnostic for a device from knowledge of its structure and function. The diagnostic should achieve both coverage of the faults that can occur in the device, and should strive to achieve specificity in its diagnosis when it detects a fault. A system is described that uses a simple model of hardware structure and function, representing the device in terms of its intenral primitive functions and connections. The system designs a diagnostic in three steps. First, an extension of path sensitization is used to design a test for each of the connections in the device. Next, the resulting tests are improved by increasing their specificity. Finally the tests are ordered so that each relies on the fewest possible connections. We describe an implementation of this system and show examples of the results for some simple devices.

Descriptors :   *Computer aided diagnosis, *Information theory, *Multiplexing, Artificial intelligence, Paths, Sensitizing, Models, Faults, Algorithms, Test methods, Diagnosis(General), Theses

Subject Categories : Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE