Study on Data Fusion Fault Diagnosis Based on Dempster-Shafer Evidential Theory

Starting with the basic conception and fusion reasoning method of Dempster-Shafer evidential theory. It is proposed to a basic probability assignment method of according with fault diagnosis characteristic. Multi-fault characteristic information fusion diagnosis frame is constructed and applied in the failt diagnosis of the hydraulic pump. It is shown that the method is effectively to improve the reliability of the diagnosis. So the fault diagnosis method proves highly effective.