METHOD AND DEVICE FOR FORMATION OF KNOWLEDGE BASE AND TROUBLE DIAGNOSTIC METHOD USING THE KNOWLEDGE BASE

PURPOSE:To simplify the formation of a fault tree by separating with hierarchy the fault tree into a duplex tree group and an original fault tree group and forming a knowledge base based on the fault tree. CONSTITUTION:An original fault tree group is produced on a CRT screen with use of an input/output device connected to a fault tree input device 1. Then the tree group is evolved into a hierarchical knowledge base 3 and an on-line mapping table 4 by a fault tree data analyzing device 2. A mapping process mechanism 7 secures the connection between the knowledge data base variable stored in the table 4 and the address of a process data table 8 to produce the addressing process data and supplies this data to an on-line inference mechanism 5. The mechanism 5 performs an inference process based on the addressing process data supplied from the mechanism 7 and the base 3. An inference result output device 6 shows the inference result to an observer in an optimum format.