Title:
OPTIMIZATION ALGORITHM FOR AUTOMATICALLY DETERMINING VARIATIONAL MODE DECOMPOSITION PARAMETERS ON BASIS OF BEARING VIBRATION SIGNAL
Document Type and Number:
WIPO Patent Application WO/2023/178808
Kind Code:
A1
Abstract:
The present invention belongs to the technical field of signal decomposition. Provided is an optimization algorithm for automatically determining variational mode decomposition parameters on the basis of a bearing vibration signal. The method comprises: firstly, reflecting the size of a bandwidth by using mode energy, and establishing a bandwidth optimization sub-model, which is used for automatically acquiring an optimal bandwidth parameter αopt; secondly, establishing an energy loss optimization sub-model, which is used for avoiding an under-decomposition phenomenon; thirdly, establishing a mode average position distance optimization sub-model, which is used for preventing the generation of excessive k, so as to avoid an over-decomposition phenomenon; and finally, taking into comprehensive consideration the interaction between a bandwidth parameter α and the total number K of modes, the mutual influence between mode components, and the integrity of reconstruction information, performing nonlinear transformation by using a logarithmic function, making values of the three optimization sub-models form similar scales, obtaining an optimization model capable of automatically determining optimal VMD parameters αopt and Kopt, and establishing a quantitative evaluation index for the decomposition performance of a VMD algorithm. The present invention can qualitatively and quantitatively provide the optimization algorithm, which has higher-precision signal decomposition performance.
Inventors:
SUN XIMING (CN)
WANG AINA (CN)
LI YINGSHUN (CN)
QIN PAN (CN)
ZHONG CHONGQUAN (CN)
WANG AINA (CN)
LI YINGSHUN (CN)
QIN PAN (CN)
ZHONG CHONGQUAN (CN)
Application Number:
PCT/CN2022/092093
Publication Date:
September 28, 2023
Filing Date:
May 11, 2022
Export Citation:
Assignee:
UNIV DALIAN TECH (CN)
International Classes:
G06K9/00
Foreign References:
| CN107506330A | 2017-12-22 | |||
| CN109145727A | 2019-01-04 | |||
| CN113642508A | 2021-11-12 | |||
| CN113704868A | 2021-11-26 | |||
| US20220050024A1 | 2022-02-17 |
Attorney, Agent or Firm:
LIAONING HONGWEN INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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