Cooperative Detection and Decomposition Approach of Deviation-included Frequency Components for Mechanical Transmission Systems
Fault diagnosis of transmission systems plays an essential role in ensuring the reliable operation of equipment,and signal decomposition is an important technique in fault feature extraction.Due to the existence of transmission error,component inertia,and frequency resolution,the tested frequency of the vibration signal component often deviates from the theoretical one calculated according to the kinematic relationship,and the existence determination of the components is usually ignored.The above limitations result in common challenges for the mainstream signal decomposition approaches in terms of decomposition accuracy and physical interpretability for decomposing deviation-included frequency components.Therefore,a deviation-included frequency component cooperative detection and decomposition approach is proposed to detect the deviation-included frequency components and determine their existence.The cooperative detection results can be further used as the basis of signal decomposition,and the decomposition accuracy is greatly improved compared with the existing methods without cooperative detection.Finally,three practical application cases demonstrate the effectiveness of the proposed method in transmission system signal characteristics extraction under stationary and non-stationary conditions.
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