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Enhanced stochastic resonance system and diagnostic method for machinery fault based on system

A stochastic resonance and mechanical failure technology, applied in the field of mechanical fault diagnosis and enhanced stochastic resonance system, to achieve the effect of fault diagnosis

Active Publication Date: 2012-11-14
XI AN JIAOTONG UNIV
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Problems solved by technology

Aiming at the problem of weak feature extraction under strong background noise, this method uses the organic combination of multiple stochastic resonance systems to improve its processing effect, judges the operating status of mechanical equipment according to the extracted fault features, and completes fault diagnosis

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  • Enhanced stochastic resonance system and diagnostic method for machinery fault based on system
  • Enhanced stochastic resonance system and diagnostic method for machinery fault based on system
  • Enhanced stochastic resonance system and diagnostic method for machinery fault based on system

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Embodiment Construction

[0020] The present invention is described in further detail below in conjunction with accompanying drawing:

[0021] The enhanced stochastic resonance system of the present invention includes a plurality of stochastic resonance systems, wherein the output of the first-stage stochastic resonance system is used as the input of the second-stage stochastic resonance system, and the output of the second-stage stochastic resonance system is used as the third-stage stochastic resonance system input, and so on, the output of the last-stage stochastic resonance system is the output of the enhanced stochastic resonance system.

[0022] The mechanical fault diagnosis method based on the enhanced stochastic resonance system includes the following steps:

[0023] 1) Calculate the fault characteristic frequency of the mechanical equipment, and input the vibration data of the mechanical equipment to be diagnosed obtained from the on-site test into the enhanced stochastic resonance system for...

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Abstract

The invention discloses an enhanced stochastic resonance system and a diagnostic method for a machinery fault based on the enhanced stochastic resonance system. According to the invention, a plurality of stochastic resonance systems are organically combined together so as to enhance weak signals, wherein the output of this level of the stochastic resonance system is used as the input of the next level of the stochastic resonance system, and then, fault information of mechanical equipment is extracted with an enhanced stochastic resonance technology so as to effectively diagnose the fault of the mechanical equipment. This method solves the problem that the weak signals are hard to extracte under a background of strong noises, amplifies the weak fault information submersed by the noises and plays an important role in diagnosis for early fault of the mechanical equipment.

Description

technical field [0001] The invention belongs to the field of mechanical equipment fault diagnosis, and relates to an enhanced stochastic resonance system and a mechanical fault diagnosis method based on the system. Background technique [0002] Mechanical equipment is an important part of the elements of the national economy, carrying the special historical mission of creating material wealth and improving the quality of human life. Once mechanical equipment fails, the consequences will be disastrous. Mechanical equipment usually operates under harsh working conditions such as low speed and heavy load. Due to complex and variable vibration transmission paths, strong background noise under harsh working conditions, mutual coupling of excitation and response of multiple vibration sources, test noise and human interference, etc. Affected by many factors, what is actually obtained in the fault diagnosis must be a noise pollution signal with a very low signal-to-noise ratio and v...

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Application Information

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IPC IPC(8): G01M13/04
Inventor 雷亚国林京韩冬廖与禾王琇峰
Owner XI AN JIAOTONG UNIV
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