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Fault diagnosis method for planetary gearbox based on resonance sparse decomposition and fasta algorithm

A resonance sparse decomposition, planetary gearbox technology, applied in the testing of mechanical components, testing of machine/structural components, instruments, etc., can solve problems such as background noise interference, ICA separation failure, etc., to achieve the effect of extracting fault features

Active Publication Date: 2021-05-18
SOUTHEAST UNIV
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Problems solved by technology

[0005] Purpose of the invention: In view of the problems in the prior art that the ICA separation fails due to experimental equipment installation errors and serious background noise interference, the present invention provides a fault diagnosis method for planetary gearboxes based on resonance sparse decomposition and FastICA algorithm

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  • Fault diagnosis method for planetary gearbox based on resonance sparse decomposition and fasta algorithm
  • Fault diagnosis method for planetary gearbox based on resonance sparse decomposition and fasta algorithm
  • Fault diagnosis method for planetary gearbox based on resonance sparse decomposition and fasta algorithm

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Embodiment Construction

[0044] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention.

[0045] This embodiment provides a planetary gearbox fault diagnosis method based on resonance sparse decomposition and FastICA algorithm,

[0046] The schematic diagram of the simulation test bench of this embodiment is as follows figure 2 shown. The driving motor simulates the torque input of the wind wheel, and is connected to the load motor after two-stage gear transmission. In order to simulate the time-varying characteristics of the speed of the wind rotor, a frequency converter is used to control the speed of the motor. Various types of faults of planetary gearboxes are prepared by artificially processing defects. The test bench can simulate the vibra...

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Abstract

The invention discloses a planetary gearbox fault diagnosis method based on resonance sparse decomposition and FastICA algorithm, which includes the following steps: 1) firstly, using the resonance sparse decomposition method to decompose the vibration signal into a high resonance component and a low resonance component, and rejecting signals containing broadband 2) Take the high resonance component containing the planetary gearbox as the observation signal, and then perform a resonance sparse decomposition on the observation signal to form a virtual channel signal; 3) use the fast independent component analysis algorithm to analyze the observation signal and the virtual channel signal After processing, the effective fault characteristic components are separated, so as to identify the fault type. The invention can effectively extract the fault characteristic frequency of the planetary gearbox, solve the problems of fault information loss and modal aliasing in the process of EMD denoising, and can also solve the decomposition caused by the difference between the number of source signals and the number of observation signals in ICA Inaccurate problems, but also accurately and clearly extract the fault characteristic frequency of the planetary gearbox.

Description

technical field [0001] The invention belongs to the field of fault diagnosis of rotating machinery, in particular to a fault diagnosis method for a planetary gearbox based on resonance sparse decomposition and FastICA algorithm. Background technique [0002] Planetary gearboxes are widely used in various transmission systems such as aviation, construction machinery, and wind power generation. The working environment is complex, and the surface is subjected to alternating loads. Fault diagnosis and monitoring of planetary gearboxes are crucial to ensuring the normal operation and safety of mechanical systems. Running is important. [0003] In practical engineering applications, the vibration signal of the planetary gearbox is the coupling of various excitation factors, and its frequency components are very complex, including not only the rotation frequency of each component, the meshing frequency of the gear pair and its multiplier, but also the equipment being excited. The ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/028
CPCG01M13/028
Inventor 邓艾东朱静邓敏强孙文卿程强刘洋
Owner SOUTHEAST UNIV
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