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Adaptive center frequency mode decomposition method and system

A center frequency and mode decomposition technology, applied in the direction of adaptive network, impedance network, electrical components, etc., can solve the problems of cumbersome optimization process of decomposition parameters such as bandwidth parameters and the number of mode components, low efficiency, poor accuracy, etc., to avoid Complicated optimization process, high efficiency and good accuracy

Active Publication Date: 2021-02-12
SUZHOU UNIV
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Problems solved by technology

[0003] For this reason, the technical problem to be solved by the present invention is to overcome the cumbersome optimization process of decomposition parameters such as bandwidth parameters and the number of mode components in the prior art, and the problems of poor accuracy and low efficiency, thereby providing a method that avoids bandwidth parameters and mode components. The optimization process of decomposition parameters such as number is cumbersome, and the method and system of self-adaptive center frequency mode decomposition with good accuracy and high efficiency

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  • Adaptive center frequency mode decomposition method and system
  • Adaptive center frequency mode decomposition method and system
  • Adaptive center frequency mode decomposition method and system

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Embodiment 1

[0024] Such as figure 1 As shown, the present embodiment provides an adaptive center frequency mode decomposition method, including the following steps: Step S1: Establish a data-driven adaptive center frequency fast positioning strategy; Step S2: Establish a primary decomposition strategy that satisfies signal reconstruction; Step S3: realizing adaptive decomposition of non-stationary signals by combining the data-driven adaptive center frequency rapid positioning strategy and the first-order decomposition strategy satisfying signal reconstruction.

[0025]The self-adaptive central frequency mode decomposition method described in this embodiment, in the step S1, establishes a data-driven adaptive central frequency rapid positioning strategy, which can adaptively determine the number of components contained in the non-stationary signal and its approximate central frequency , especially using the first iterative center frequency to construct a convergent trend discriminant func...

Embodiment 2

[0063] Based on the same inventive concept, this embodiment provides an adaptive central frequency mode decomposition system, the problem-solving principle of which is similar to that of the adaptive central frequency mode decomposition method, and the repetition will not be repeated.

[0064] This embodiment provides an adaptive central frequency mode decomposition system, including:

[0065] The first establishment module is used to establish a data-driven self-adaptive center frequency rapid positioning strategy;

[0066] The second establishment module is used to establish a decomposition strategy satisfying signal reconstruction;

[0067] The joint module is used for jointing the data-driven self-adaptive central frequency rapid positioning strategy and the first-order decomposition strategy satisfying signal reconstruction to realize adaptive decomposition of non-stationary signals.

[0068] Those skilled in the art should understand that the embodiments of the present ...

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Abstract

The invention relates to a self-adaptive center frequency mode decomposition method and system. The method comprises the following steps: establishing a data-driven self-adaptive center frequency rapid positioning strategy; establishing a primary decomposition strategy meeting signal reconstruction; and combining the data-driven adaptive center frequency rapid positioning strategy and the primarydecomposition strategy satisfying signal reconstruction to realize adaptive decomposition of the non-stationary signal. The method effectively avoids the problems of mode aliasing and the like causedby unreasonable parameter setting, and is good in accuracy and high in efficiency.

Description

technical field [0001] The invention relates to the technical field of signal decomposition and detection, in particular to an adaptive center frequency mode decomposition method and system. Background technique [0002] The signal decomposition method is very critical to the detection and analysis of industrial signals. At present, many adaptive signal analysis methods have been developed, such as empirical mode decomposition, local mean value decomposition, local eigendecomposition, adaptive local iterative filter decomposition, empirical wavelet decomposition and nonlinear mode decomposition, etc. These methods all have their own limitations, such as the need for preset parameters, mode aliasing, and endpoint effects, which limit the application range of existing adaptive signal decomposition methods. In particular, the variational mode decomposition method is an adaptive signal decomposition technology proposed in 2014, which can decompose a multi-component non-stationa...

Claims

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Application Information

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IPC IPC(8): H03H21/00
CPCH03H21/00
Inventor 江星星宋秋昱汪海恩黄强王俊石娟娟杜贵府朱忠奎
Owner SUZHOU UNIV
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