Research on the valve plate fault diagnosis method based on excitation diagnosis
The response of the valve plate of a reciprocating compressor shows high impact and strong noise.In order to solve the problem that incentive based fault diagnosis methods were difficult to apply to compressor valve leakage fault diagnosis,a response characteristic based reciprocating compressor valve leakage fault diagnosis method was proposed.Using the motor stator current signal as the excitation signal and the vibration acceleration signal as the response signal,the excitation and response characteristics were analyzed.Features from the response signal were extracted by using ensemble empirical mode decomposition(EEMD).Different degrees of valve leakage faults were simulated.And experiments on the classification performance of support vector machine(SVM)based on response characteristics were performed.The experimental results show that the fault diagnosis method based on response characteristics has good SVM classification performance.
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