The Research On Vibration Fault Diagnosis And Expert System Of Steam Turbine

In order to meet the requirements of the vibration monitoring system of steam turbine, this paper has done the design work on the vibration fault diagnosis expert system of steam turbine and completed the corresponding development work. This paper has made deep research on the knowledge-base of the system and adopted dual-factor method as the knowledge expression. This paper designed the organization frame, data structure and the function process of knowledge-base according to the requirements of the diagnosis system. The thesis also made some discussion on the fault diagnosis inference method. Detailed process design has been done on the inference method based on dual-factor method, which made foundation for the future system development work. The present work has done the development work on the fault diagnosis system associating knowledge-base design and diagnosis inference process and completed the development of knowledge-base management system, mutual diagnosis function and diagnosis result management system. On the basis of fault diagnosis system, we have processed analysis on two kinds of vibration fault mechanism of shaft-bow and rub-impact rotor, acquired the fault diagnosis rules according to the analysis results and input them to the knowledge-base. According to the mutual diagnosis inference process, we have done analogue inference on the two kinds of vibration faults, which can process the diagnosis inference well and reach the expected results.