Application of grey relation analysis in fault diagnosis of EHA-VSVP

According to the increasing safety and reliability requirements of all electric / more electric aircraft, the reliable operation of electro-hydraulic actuator with variable pump and variable motor (EHA-VSVP) is very important. As a complicate mechanical-electro-hydraulic integration system, EHA-VSVP has complex fault features and symptoms; a novel fault diagnosis method based on the grey relation degree is proposed, into which the fault analysis of EHA-VSVP is introduced. In the fault diagnosis experiment of EHA-VSVP engineering sample, practical faults were diagnosed through calculating the grey relation degree between the standard fault set and the pending set. Experimental results prove this method is feasible, simple and efficiency for the fault diagnosis of EHA-VSVP.