|Table of Contents|

Identification for modal parameters of liquid rocket engine based on ARMA time-sequence analysis(PDF)

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

Issue:
2010年06期
Page:
15-20
Research Field:
研究与设计
Publishing date:

Info

Title:
Identification for modal parameters of liquid rocket engine based on ARMA time-sequence analysis
Author(s):
DU Fei-ping1;  TAN Yong-hua2 ;  CHEN Jian-hua1;  HUANG Dao-qiong1
1 Xi’an Aerospace Propulsion Institute, Xi’an 710100 China； 2 Academy of Aerospace Propulsion Technology, Xi’an 710100 China
Keywords:
-
PACS:
V434-32
DOI:
-
Abstract:
In the field of the modal parameters identification of liquid rocket engines, the frequency method is widely used, but it has some shortcomings, such as power reveal, frequency domain aliasing and off-line analysis. Moreover, it may need complex equipment for vibration. In this paper, the method of ARMA based on time-domain identification is applied to this field. By using this method, more accurate modal parameters were obtained by calculation. Besides, the nonlinear effects on the structure of the liquid rocket engine were tested. The method of ARMA improved the computational efficiency and extended the identification range of parameters of liquid rocket engine. It laid the foundation for the parameters identification of the

References:

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