Accession Number : AD0840561

Title :   DYNAMIC FAULT DIAGNOSIS TECHNIQUES.

Descriptive Note : Final rept. 1 May 67-1 Jul 68,

Corporate Author : SCULLY INTERNATIONAL INC DOWNERS GROVE IL

Personal Author(s) : Stahl, Walter J. ; Maenpaa, John H. ; Stehman, Carl J.

Report Date : SEP 1968

Pagination or Media Count : 76

Abstract : The work was directed toward the advancement of a recently developed technique for diagnosing faults in conventional electronic circuits. Results of a field data collection effort are presented and discussed. An automatic tester, FRIEND, is described which implements the tests prescribed by an IBM 7094 computer program. Also included is a discussion on the extension of the technique to the system level. The technique for fault isolation is based on the analysis and measurement of various network functions of the circuit under test. The required test points are limited to the normally available input-output terminals, thereby reducing the complexity of required test procedures and equipment. Modifications and improvements to a FORTRAN-IV computer program, which was developed under a previous contract, are described. The computer program is capable of automatic generation of test specifications and fault diagnosis tables for conventional linear circuits of practical size. An updated computer program listing has been delivered as a separate item from this report due to its size, approximately 14,000 FORTRAN statements. The detailed theory of operation, wiring diagrams, calibration procedures, etc., for FRIEND have also been submitted as a separate document. In addition, the results of an experiment on a demonstration circuit used with FRIEND are included in this report, along with the results of some special studies. (Author)

Descriptors :   (*CIRCUITS, TEST METHODS), FAILURE(ELECTRONICS), TEST EQUIPMENT, AUTOMATIC, FAILURE, DETECTION, COMPUTER PROGRAMMING.

Subject Categories : Electrical and Electronic Equipment
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE