Title :
Real-time fault diagnostics with multiple aspect models
Author :
Padalkar, S. ; Karsai, Gabor ; Sztipanovits, J. ; Okuda, K. ; Miyasaka, N.
Author_Institution :
Dept. of Electr. Eng., Vanderbilt Univ., Nashville, TN, USA
Abstract :
A real-time fault diagnostics system that is applicable for diagnosing large-scale plants is described. It uses a multiple aspect model of the plant including the hierarchical process model, the hierarchical component model, and the hierarchical fault model (HFM). HFM represents the spatial and temporal aspects of faulty behavior in the form of a hierarchical fault propagation digraph. The reasoning algorithm is based on the structural and temporal constraint enforcement, and is migrated to lower levels of HFM hierarchy. It is able to guarantee response times, perform nonmonotonic and temporal reasoning, operate continuously, accept asynchronous data, generate requests, perform time and diagnostic resolution tradeoffs, and diagnose single and most multiple fault cases
Keywords :
computerised monitoring; fault location; inference mechanisms; knowledge based systems; real-time systems; temporal logic; IKBS; asynchronous data; computerised monitoring; faulty behavior; hierarchical component model; hierarchical fault model; hierarchical fault propagation digraph; hierarchical process model; inference mechanisms; large-scale plants; multiple aspect model; nonmonotonic reasoning; real-time fault diagnostics system; requests generation; spatial aspects; structural constraint; temporal constraint enforcement; temporal logic; temporal reasoning; Application specific integrated circuits; Computerized monitoring; Costs; Delay; Event detection; Fault diagnosis; Feedback loop; Large-scale systems; Process control; Real time systems;
Conference_Titel :
Robotics and Automation, 1991. Proceedings., 1991 IEEE International Conference on
Conference_Location :
Sacramento, CA
Print_ISBN :
0-8186-2163-X
DOI :
10.1109/ROBOT.1991.131685
