Unified Decision of Multi Diagnosis Agent Based on Improved Evidence Theory

摘要

When collected evidence highly conflict each others, illogical results may be obtained by classical Dempster combination rule. All kinds of improvement on evidence theory are analyzed. To avoid the deficiencies of traditional methods and sufficiently utilize all information, the concept of evidence distance is adopted into to distill the available features of evidence conflictions based on Yager improved method. And a new weighted assignment method of confliction information based on evidence support is put forward. The distance denotes the similarity of two evidences. The synthetic diagnosis resolution of decision Agent will be the final diagnosis resolution of fault diagnosis system.