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Large wind turbine gearbox fault diagnosis

Author: ZhaoLiChao
Tutor: ChenChangZheng；WangBingCheng
School: Shenyang University of Technology
Course: Mechanical Manufacturing and Automation
Keywords: Large wind turbines Gearbox Expert System Troubleshooting
CLC: TH165.3
Type: Master's thesis
Year: 2011
Downloads: 314
Quote: 1
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Abstract


Wind turbine wind turbine gearbox is in one of the most important mechanical components , its main function is under the action of the wind , the wind turbine generates mechanical energy transmitted to the generator , especially for large-scale wind turbine units , the wind turbine one of the major sources of gearbox failure , thus ensuring the normal operation of wind turbine gearbox is extremely important . In this paper, large-scale wind turbine gearboxes for the monitoring and diagnosis of the object, research and the development of the base ten vibration signal processing of large wind turbine gearbox fault diagnosis expert system . In this paper the vibration acceleration sensors, charge amplifier and NI USB9215A instruments such as portable data acquisition to build a data acquisition system. To further determine the expert system knowledge base contents gearbox failure characteristics of research , relying on a large number of experimental data , compare and summarize predecessors used various diagnostic methods , and ultimately determine kurtosis index for secondary analysis thereby determining characteristic values ​​monitored by the proportion of the energy eigenvalue spectrum method to determine the fault , and then use the BP neural network, gray correlation theory and DS evidence theory to design expert system inference engine , and then the three simulation methods , thus proving large wind turbine gearbox fault diagnosis expert system validity and correctness . In order to better construct a fault diagnosis expert system , this paper uses UML modeling language , combined with Computer Assistant Software Engineering, MATLAB7.0 and Visual Basic6.0 complete expert system software design . Finally, a large number of experimental verification of a large wind turbine gearbox fault diagnosis expert system can effectively and accurately for large wind turbine gearbox condition monitoring and fault diagnosis .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Machinery Manufacturing Technology > Flexible manufacturing systems and flexible manufacturing cell > Fault diagnosis and maintenance
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