The invention discloses a fault diagnosis method and
system for a heading
machine hydraulic
system. The method includes: building a fault diagnosis
system framework through a
fuzzy neural network method, building subsystems such as a parameter monitoring module, a fault
knowledge base management maintenance module and an intelligent diagnosis reasoning module, taking a
knowledge base of the heading
machine hydraulic system as the basis and combining each module into a whole organically; building the overall structure of the
knowledge base which comprises a fault type base, a fault knowledge base and a fault rule base according to the
expert system design principle, introducing a relational data base into a knowledge base system, using the ACCESS as the
database platform, building corresponding data sheets, realizing the functions of the
expert system and managing and maintaining the knowledge base through fully utilization of the
database technology; and building a
fuzzy neural network fault diagnosis mode, reducing the network
instability through the
adaptive learning rate method and the additional
momentum method, and training and simulating the
fuzzy neural network model through actual data. Therefore, the fault diagnosis method and system for the heading
machine hydraulic system can accurately reflect the faults of the heading machine hydraulic system.