The fault diagnosis of hydraulic pump based on the data fusion of D-S evidence theory

According to D-S evidence theory, build the multiple fault diagnosis system based on the data fusion, using distance method of Manhattan to construct with fault diagnosis characteristic of basic probability assignment function, which ensures the objectification of credibility distribution evaluation. Take the plunger pump as the experimental object, to apply the fault diagnosis system to fault diagnosis of hydraulic pump, examples show that it can effectively improve the reliability of diagnostic, which fully revealed that the diagnosis method is effective.