Ship shafting unbalance fault diagnosis method based on vector evidence inference

• Main Authors: GAO DIJU, XU XIAOBIN, FANG DANFENG, YE ZIFA, GAO HAIBO, HOU PINGZHI
• Format: Patent
• Language: Chinese; English
• Published: 20.08.2019
• Subjects: CALCULATING; COMPUTING; COUNTING; HANDLING RECORD CARRIERS; MEASURING; PHYSICS; PRESENTATION OF DATA; RECOGNITION OF DATA; RECORD CARRIERS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention relates to a ship shafting unbalance fault diagnosis method based on a vector evidence inference. The method is characterized by combining principal component variables according to a contribution rate, and using a combined input characteristic variable to form an input vector; using a qualitative information conversion method to obtain a comprehensive similarity of a fault sample with respect to the input vector and an output irregularity fault reference level, and constructing a vote point statistics table reflecting a relationship between an input reference vector and an output fault; obtaining a diagnostic evidence corresponding to each reference vector according to the table, and constructing a vector evidence matrix table; acquiring reliability of the input vector and an evidence weight according to the contribution rate of the input principal component variable; and obtaining the evidence of each group of input sample vectors in a sample set, using an evidence inference rule to obtain a f