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Method for extracting weak fault characteristic information of planetary gear

A planetary gear and fault feature technology, which is applied in the field of planetary gear weak fault feature information extraction, can solve the problems of ignoring the interaction and failing to give full play to the advantages of stochastic resonance, and achieve the effect of strong versatility and reliable results

Active Publication Date: 2015-04-01
SHANDONG ZHONGHENG OPTOELECTRONIC TECH CO LTD
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Problems solved by technology

Due to its advantages in detecting weak signals, stochastic resonance has been a research hotspot in recent years. However, due to the influence of adiabatic approximation and linear response theory, stochastic resonance is only suitable for dealing with small parameter signals. In view of this problem, many scholars have did the corresponding research
However, the existing stochastic resonance method selects system parameters subjectively or only performs adaptive optimization on a single parameter, ignoring the interaction between various parameters, resulting in the failure of the advantages of stochastic resonance in weak feature extraction.

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  • Method for extracting weak fault characteristic information of planetary gear
  • Method for extracting weak fault characteristic information of planetary gear
  • Method for extracting weak fault characteristic information of planetary gear

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Embodiment Construction

[0040] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be regarded as isolated, and they can be combined and combined with each other to achieve better technical effects.

[0041] Such as Figure 1-Figure 3 As shown, a method for extracting weak fault feature information of planetary gears based on improved overall average empirical mode decomposition and adaptive stochastic resonance described in the invention includes the following steps:

[0042]Step 100, collecting vibration signals. Using the acceleration sensor to measure the original vibration signal of the planetary gear housing, the obtained signals include three types: the normal state of the planetary gear sun gear, the broken tooth state and the root crack, such as Figure 4 shown.

[0043] Step 200, extracting e...

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Abstract

The invention discloses a method for extracting weak fault characteristic information of a planetary gear based on improved ensemble average empirical mode decomposition and adaptive stochastic resonance. The method comprises vibration signal acquisition, fault characteristic information effective IMF extraction and weak fault characteristic extraction based on adaptive stochastic resonance. The method can extract the weak fault characteristic information generated due to faults of the planetary gear, and can realize planetary gear fault diagnosis according to the extracted weak fault characteristic information; and the method is an effective planetary gear weak fault characteristic information extraction method.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis of planetary gears, and in particular relates to a method for extracting weak fault feature information of planetary gears based on improved overall average empirical mode decomposition and adaptive stochastic resonance. Background technique [0002] Planetary gear transmission has the advantages of small size, light weight, and large transmission ratio, and is widely used in large and complex machinery with low speed and heavy load. Compared with the fixed axis gear transmission, the planetary gear transmission is a strongly nonlinear system. Due to the working conditions of the planetary gear transmission system, internal parameter changes, planetary gear installation errors and manufacturing errors, multi-tooth meshing and transmission path effects, there are many occurrences. The amplitude modulation and frequency modulation phenomenon of the signal shows stronger nonlinear and non-sta...

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Application Information

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IPC IPC(8): G01M13/02
Inventor 程刚陈曦晖刘晓乐山显雷刘后广
Owner SHANDONG ZHONGHENG OPTOELECTRONIC TECH CO LTD
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