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Fault diagnosis method of planetary gear transmission system

A technology of planetary gear transmission and fault diagnosis, which is applied in the direction of machine gear/transmission mechanism testing, special data processing applications, instruments, etc., and can solve problems such as slow frequency domain changes

Inactive Publication Date: 2015-02-04
TIANJIN POLYTECHNIC UNIV
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  • Abstract
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Problems solved by technology

However, the frequency response function of the response structure transmission effect only appears peaks near the modal frequencies of each order, and the frequency domain changes relatively slowly.

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  • Fault diagnosis method of planetary gear transmission system
  • Fault diagnosis method of planetary gear transmission system
  • Fault diagnosis method of planetary gear transmission system

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Embodiment Construction

[0058] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0059] figure 1 It is an overall flowchart of a fault diagnosis method for a planetary gear transmission system. The main fault diagnosis steps are as follows:

[0060] 1) Using homomorphic filtering technology to process the collected vibration signal of the planetary gear transmission system, separate the signal containing fault characteristics and the external excitation background noise signal, and reduce the complexity of the data;

[0061] 2) Using complex cepstrum transform to reconstruct the spectrum of the signal containing fault features after homomorphic filtering, and extract the fault feature information in the vibration signal of the planetary gear transmission system;

[0062] 3) Combined with the vibration mechanism of the planetary gear transmission system, using the support vector machine SVM classifier, taking the time dom...

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Abstract

The invention relates to a fault diagnosis method and system of a planetary gear transmission system, belonging to the fields of a fault diagnosis technique and a signal processing and analyzing technique. The fault diagnosis method comprises the following main fault diagnosis steps: (1) processing acquired vibration signals of the planetary gear transmission system by utilizing a homomorphic filtering technical method, and separating signals comprising fault features and external excitation background noise signals to reduce the complexity of data; (2) carrying out frequency spectrum reconstruction on the signals comprising the fault features after homomorphic filtering processing by adopting complex cepstrum transform, and extracting the fault feature information in the vibration signals of the planetary gear transmission system; and (3) diagnosing the running state of the planetary gear transmission system to be the normal state or the fault state by combining a vibration mechanism of the planetary gear transmission system, utilizing a classifier of a support vector machine (SVM) and taking the time domain statistics at different states and peak value energy after frequency spectrum reconstruction as fault feature vectors.

Description

technical field [0001] The invention belongs to the field of mechanical fault diagnosis technology and signal processing and analysis technology, and in particular relates to a fault diagnosis method for a planetary gear transmission system. Background technique [0002] The planetary gear system is compact in structure, small in size, wide in transmission ratio range and high in efficiency, and is a widely used epicyclic gear transmission system. Due to its large torque-to-weight ratio, compact structure, and high power efficiency, it is often used as a power transmission device and is widely used in fields such as automobiles, industrial machinery, wind power generation, aerospace, and transportation ships. [0003] The structure of the planetary gear system is more complicated than that of the fixed-axis gear system, and it has the characteristics of multi-point meshing and constantly changing meshing positions. Its damage mode and dynamic response are different from thos...

Claims

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Application Information

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IPC IPC(8): G01M13/02G06F19/00
Inventor 李雅峰徐玉秀
Owner TIANJIN POLYTECHNIC UNIV
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