Gearbox fault diagnosis method based on resonance base bandwidth Fourier decomposition

A fault diagnosis and gearbox technology, applied in the testing of mechanical components, the testing of machine/structural components, measuring devices, etc., can solve the problems of low accuracy of gearbox fault diagnosis, ignoring the inherent mechanism of vibration signals, etc. The effect of high recognition accuracy, elimination of potential safety hazards, and improved reliability
CN112539933AInactive Publication Date: 2021-03-23SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHEAST UNIV
Publication Date
2021-03-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a gearbox fault diagnosis method based on resonance base bandwidth Fourier decomposition, and the method comprises the steps: firstly building a transient vibration response model of a gearbox based on a single-degree-of-freedom mass rigidity damping system through resonance base bandwidth Fourier decomposition; then, estimating the natural vibration frequency of a gearbox vibration system through Fourier spectrum maximum value point search, extracting a resonance band in an original signal through bandwidth optimization, finally, selecting out effective components containing more fault information in a decomposition result according to the characteristic frequency ratio, and realizing accurate identification of gearbox faults through Hilbert demodulation. The methodhas the characteristics of high calculation speed, strong anti-noise capability and high fault identification precision, and can be effectively applied to gearbox fault diagnosis in a complex noise environment.
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Description

Technical field

[0001] The present invention relates to the technical field of intelligent fault analysis algorithm, and is specifically a gear box fault diagnosis method based on resonant baseband width Fourier. Background technique

[0002] Gearboxes are one of the most widely used mechanical transmission components in industrial production. The health status is largely influenced by the safety and economy of the entire equipment. However, due to factors such as alternating load, chemical erosion, the fault is frequently transmitted, mainly including gears, wear, glue, and fracture. Therefore, the accurate diagnosis of gearbox faults is significant for the safe risks of mechanical equipment in time, and improve the reliability of equipment operation.

[0003] The vibration signal analysis is one of the most effective methods of mechanical equipment fault diagnosis. In recent years, domestic and foreign scholars have done a large number of research work in the diagnosis of gear ...

Claims

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