A method and device for extracting signal degradation features of an aircraft fuel pump

A feature extraction, fuel pump technology, applied in the field of aircraft fuel pump signal degradation feature extraction

Inactive Publication Date: 2020-08-14
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above feature extraction based on mathematical morphology is mostly used in the field of pattern recognition, and there are few cases involving degenerate feature extraction

Method used

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  • A method and device for extracting signal degradation features of an aircraft fuel pump
  • A method and device for extracting signal degradation features of an aircraft fuel pump
  • A method and device for extracting signal degradation features of an aircraft fuel pump

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Embodiment Construction

[0070] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. 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.

[0071] A kind of aircraft fuel pump signal degradation feature extraction method of the present invention, method realization comprises the following steps:

[0072] Step 1: Mathematical morphology processing; divide the collected fuel pressure data output by the aircraft fuel pump by the system working cycle as the step size, and divide the data x in each working cycle i As the basic processing unit; take the fuel pressure output x when the performance of the aircraft fuel pump...

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Abstract

The invention relates to the technical field of signal extraction, in particular to a signal degradation characteristic extraction method for an aircraft fuel pump. The method mainly comprises the following steps for data analysis: mathematical morphology processing, signal complexity measurement, weight factor calculation, MSDI construction, SVDD-based membership function determination, fuzzy information granulation, morphological spectrum decay fuzzy information particle kernel generation, health base curve fitting, etc. The invention further discloses a signal degradation characteristic extraction device for the aircraft fuel pump. The device comprises a signal acquiring and preprocessing module, a data calculating and analyzing module, and a result outputting module, and extracts characteristic quantities and calculates and analyzes the extracted characteristic quantities according to the signal degradation characteristic extraction method for the aircraft fuel pump. The signal degradation characteristic extraction method and device for the aircraft fuel pump provided by the invention has the advantages that a signal characteristic description process algorithm is simpler, andan obtained performance analysis result of the aircraft fuel pump is more accurate.

Description

technical field [0001] The invention relates to the technical field of information extraction, in particular to a method and device for extracting signal degradation features of an aircraft fuel pump. Background technique [0002] The fuel system is an important part of the aircraft system and an important device to improve aircraft performance and ensure flight safety. With the increasing complexity of new aircraft, problems such as fuel system fault diagnosis, prediction and maintenance support have received more and more attention. Traditional aircraft systems use built-in self-test (BIT) methods to detect faults, or use plan-based maintenance methods to periodically repair or replace system components. Although these methods are effective, they cannot fully prevent the occurrence of major accidents in flight; regular repair or replacement of system components will bring unnecessary component replacement and human resource consumption, and increase system maintenance cos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/62
Inventor 李文娟刘海强
Owner XIAN UNIV OF SCI & TECH
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