Modified D-S Evidential Theory in Hydraulic System Fault Diagnosis

In order to solve the problem of hydraulic system fault diagnosis, an information fusion method, which is for hydraulic system fault diagnosis based on modified D-S evidential theory and time space domain, is presented. Accor- ding to the measurement results of the pressure and the temperature and the flux, the belief function assignment of the three sensors, then using the DS rule and decision rule, fused the information in time-space domain, and at last recognize the fault. The simulated experiment shows that the method in evidence conflicted still correct and can avoid index exploded and exactly fixed the fault.