|Table of Contents|

Application of conjugate gradient algorithm in vibration signal processing(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2021年01期
Page:
97-100
Research Field:
测控与试验
Publishing date:

Info

Title:
Application of conjugate gradient algorithm in vibration signal processing
Author(s):
LI Qiqi;  ZHUANG Jian;  WANG Zhichao;  ZHANG Guoqing
(Beijing Institute of Aerospace Testing Technology, Beijing 100074,China)
Keywords:
liquid rocket engine test;  conjugate gradient algorithm;  vibration signal;  simulation analysis
PACS:
TP301.6
DOI:
-
Abstract:
In order to improve the accuracy of frequency-domain data processing of vibration signal in liquid rocket engine test, a spectral estimation algorithm based on conjugate gradient and AR model is proposed.The algorithm has low computational complexity and high estimated spectral resolution, which can overcome the problem that the traditional Fourier transform power spectrum estimation algorithm cannot effectively distinguish the spectral lines of similar frequency points when the signal-to-noise ratio is reduced.In addition, it also solves the inherent shortcoming of the traditional algorithm with serious side leakage.Based on the simulation analysis and test data verification of the algorithm under different signal-to-noise ratio conditions, the estimated spectrum of this algorithm still has the characteristics of high resolution under low signal-to-noise ratio conditions.

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Last Update: 2021-02-20