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Weak harmonic signal detection system and method based on same frequency

A technology of harmonic signal and detection method, applied in the field of signal detection, can solve the problem of identifying the signal to be measured, etc.

Pending Publication Date: 2020-12-18
NAVAL UNIV OF ENG PLA
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Problems solved by technology

[0003] However, it is difficult to identify the signal under test from the background noise using traditional methods

Method used

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  • Weak harmonic signal detection system and method based on same frequency
  • Weak harmonic signal detection system and method based on same frequency
  • Weak harmonic signal detection system and method based on same frequency

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] Due to the slow convergence speed of the lv system, its application in the field of chaotic weak signal detection is limited. In this embodiment, the cosine signal is embedded into the three-dimensional lv chaotic system, and a new expression of the Lv-cos system with a cosine function is obtained. for:

[0027]

[0028] Among them, a=35, b=3, c=28, rcos(ωt) is the system built-in excitation signal.

[0029] In this embodiment, in order to simplify ...

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Abstract

The invention relates to the technical field of signal detection, in particular to a weak harmonic signal detection system and method based on the same frequency, and the method comprises the steps: adjusting the system to a critical state; inputting a to-be-tested signal with the same frequency as the built-in excitation signal of the system into the critical state system; when the system entersa large-period state, detecting the signal to be detected. According to the invention, the to-be-detected signal can be identified from the white Gaussian noise.

Description

technical field [0001] The invention relates to the technical field of signal detection, in particular to a system and method for detecting weak harmonic signals based on the same frequency. Background technique [0002] The chaotic system is sensitive to initial conditions and parameters, so it can be used for weak signal detection of ship faults, that is, small changes in the initial conditions and parameters of the system will lead to significant changes in the phase trajectory of the system. [0003] However, it is difficult to identify the signal to be tested from the background noise using traditional methods. Contents of the invention [0004] In order to solve the above technical problems, the present invention provides a weak harmonic signal detection system and method based on the same frequency, which can identify the signal to be tested from Gaussian white noise. [0005] On the one hand, the weak harmonic signal detection system based on the same frequency pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/16G06F17/15
CPCG01R23/16G06F17/15
Inventor 刘树勇王伟豪苏攀
Owner NAVAL UNIV OF ENG PLA
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