Multi-mode signal resolving and separating method and device, equipment and storage medium

Abstract

The invention discloses a multi-mode signal resolving and separating method and device, equipment and a storage medium. The method comprises the following steps that: decomposing a multi-mode frequency measurement signal to obtain a first mode component signal, wherein the multi-mode frequency measurement signal is a first time domain signal; judging whether the first mode component signal is a single-mode component signal or not, if the first mode component signal is the single-mode component signal, deciding that the first mode component signal is correctly decomposed, and on the basis of the first time domain signal and the first mode component signal, generating a to-be-decomposed time domain signal for next decomposition; if the first mode component signal is not the single-mode component signal, carrying out band-pass filtering processing on the first modal component signal subjected to mode mixing to obtain the updated single-mode component signal, and generating the to-be-decomposed time domain signal used for next decomposition; and judging whether the to-be-decomposed time domain signal meets a termination condition for mode component decomposition or not, and if the to-be-decomposed time domain signal does not meet the termination condition for mode component decomposition, repeating the above steps for continuous decomposition until the complete decomposition of each mode component signal is finished. By use of the method, the problem that a single-frequency mode component can not be accurately separated in the multi-mode frequency measurement signal can be solved.

Description

technical field [0001] The invention relates to the field of modal parameter identification of aero-engine components, in particular to a multi-modal signal analysis and separation method, device, equipment and storage medium. Background technique [0002] Modal parameter identification is a necessary means to understand the vibration characteristics of mechanical parts. Modal parameter identification mainly includes the identification of frequency, damping and mode shape, among which the accurate identification of damping is more difficult. The damping of mechanical parts is of great significance for suppressing mechanical vibration and noise, enhancing the reliability and stability of mechanical parts, and prolonging their service life. [0003] The traditional modal parameter identification mainly adopts the method of modal test, relying on the existing modal test software to directly obtain the modal parameters of mechanical parts. This method first needs to measure the...

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Problems solved by technology

[0019] The present invention provides a multi-modal signal analysis and separation method, device, equipment and storage medium to solve the problem that each modal signal in the existing multi-modal signal cannot be accurately separated, resulting in the modal parameters of the single-frequency modal component Technical issues that cannot be accurately identified

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