A weighted fuzzy theory for intervals (WFTI) method is proposed for combining evidence with different credibilities with the various sources of evidence. The study can be used for safety analysis of uncertain systems through evidence-based fuzzy approach. The procedure for WFTI includes, normalization of evidence from each source before considering the credibilities of that source and multiply the normalized evidence by the credibilities of the corresponding sources. The study incorporate a MATLAB program with WFTI to determine the credibility information of the sources. The study found that sum of lower bound on the margin of safety and the upper bound on the margin of failure is equal to 1 for all cases. The method can be used for combining evidence to evaluate the safety/failure of any uncertain system in the presence of evidence with uncertain parameters.
ASJC Scopus subject areas
- Aerospace Engineering