基于本体的数控机床故障诊断方法

fault diagnosis method based on ontology is put forward in order to solve the problem which common fault diagnosis methods are not suitable for the diagnosis of associative and complex CNC machine tools machinery fault . First, the failure mechanism of the NC machine tool and the advantages of common knowledge are analyzed and the principle of fault diagnosis method based on ontology is proposed. Second, the ontology of fault diagnosis is formally determined. Taking the hobbing machines for example, the knowledge base based on ontology, which combines with the fault diagnosis knowledge of the hobbing machines is established with Protégé. Finally, this method is applied for fault diagnosis of hobbing machine in a machine tool plant. The result shows that the method is rapid response and accurate positioning to failure.