Research on Technique of Extracting Knowledge from Maintenance Experiences Based on Conceptual Graph

Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha, Hunan, China

Abstract

Experience knowledge is extremely important in maintenance domain. However, it is difficult to express and extract this kind of knowledge. Conceptual Graph is a new and powerful visual knowledge representation method. This paper proposes one technique based on conceptual graph to extract knowledge from experiences accumulated in maintenance actions. This technique introduces conceptual graph to maintenance domain. With VE distribution pump as an example, the method of conceptual graph is introduced first, and then it is applied to expressing knowledge extracted from experiences accumulated in maintenance actions. Finally, the similarity between graphs of new fault case and base cases is computed, through which maintenance staff could find out the most similar case when new fault appears. The causes and solutions of the most similar case could assist maintenance staff to resolve new faults.