Community Research and Development Information Service - CORDIS


The subject of this research project is automatic, dynamic, on-line malfunction diagnosis. The application was developed with the expert system generator GENESIA 1 for the Lorraine coalfield and began operating in April 1990 for a DTF shearer. Diagnosis is carried out with the aid of a TELSAFE-CA transmission system connected to a PC/AT using the JBUS protocol. The base comprises 200 rules and 200 facts, with which to make 121 diagnoses. The mailbox is updated every 47 ms after filtering. The system works 24 hours a day without an operator and monitors all shearers in the workings. The diagnoses are presented in clear text and continually updated on-screen; explanations can be provided - invaluable to the user seeking to develop and adapt the tool. New diagnoses are sent to file and to printer with date and time edited in. Graphic representation using PARADOX shows up misleading information generated when bursts of erroneous diagnoses drown out relevant ones. To prevent the system from failing completely in this event, it is instructed to stop responding to such information: the system thus remains at 95 % efficiency instead of falling to zero.

Additional information

Authors: MALET J P ET AL., Centre d'Etudes et Recherches de Charbonnages de France, Rueil (FR)
Bibliographic Reference: EUR 13616 FR (1992) 79 pp., MF, ECU 4, blow-up copy ECU 12
Availability: (2)
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