Electric actuating mechanism fault diagnosis method

The invention discloses an electric actuating mechanism fault diagnosis method. The electric actuating mechanism fault diagnosis method comprises the steps that operating data and maintenance data of an electric actuating mechanism are analyzed to establish a knowledge base of operating states of the electric actuating mechanism and a diagnosis model of the electric actuating mechanism; the state characteristic quantity of the electric actuating mechanism during debugging and operation is extracted, operation is conducted on the state characteristic quantity according to the diagnosis model, and the operating state of the electric actuating mechanism is judged; if the operating state of the electric actuating mechanism is a fault state, it is determined that the electric actuating mechanism breaks down; when the electric actuating mechanism is in the fault state, the fault type of the fault state is determined according to fault classification, and self-recovery operation is conducted on the fault to restore