Fault diagnosis method and system for cutting speed reducer of cantilever type heading machine

The invention discloses a fault diagnosis method and system for a cutting speed reducer of a cantilever type heading machine, and relates to the related field of mechanical fault diagnosis and maintenance, and the method comprises the steps: carrying out the real-time monitoring of a target cutting speed reducer according to a pre-arranged speed reducer sensing array, and obtaining a real-time speed reducer sensing data source; constructing a speed reducer normal deviation vector set; activating a multi-speed reducer fault sensing channel to obtain a speed reducer composite fault sensing result; loading a real-time operation data flow of the target cutting speed reducer, correcting a speed reducer composite fault sensing result, and generating a speed reducer fault sensing report; and performing fault operation and maintenance on the target cutting speed reducer in combination with the speed reducer fault operation and maintenance library. The technical problems of low diagnosis precision, high false alarm ra