|Table of Contents|

Application of MWorks in dynamic characteristic simulation ofactuator-pipeline system(PDF)

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

Issue:
2023年05期
Page:
107-116
Research Field:
目次
Publishing date:

Info

Title:
Application of MWorks in dynamic characteristic simulation ofactuator-pipeline system
Author(s):
SUN Yongxin1;  ZHOU Chenchu2;  ZHANG Lihui1;  HU Haifeng2
(1.School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China; 2.Science and Technology on Liquid Rocket Engine Laboratory, Xi'an AerospacePropulsion Institute, Xi'an 710100, China)
Keywords:
dynamic characteristic;  actuator-pipeline system;  MWorks;  numerical simulation;  self-oscillation
PACS:
V434
DOI:
-
Abstract:
As a key component in liquid rocket engines, the actuator is used to control the working process, and its stability is directly related to the reliability of the system. In order to study the influence of actuator-pipeline system parameters on the dynamic characteristics of the engine system, according to the working principle of the flow regulator and the check valve in the liquid rocket engine system, the model of the flow regulator-pipeline system and the check valve-pipeline system were built by Modelica language on the domestic autonomous system simulation software platform MWorks, and the frequency-domain and time-domain characteristics were simulated respectively. Considering that MWorks takes time as the simulation variable, the Laplace operator was set as the global variable in order to calculate the frequency domain characteristics, and the variation curve of frequency domain parameters with frequency was obtained through the relationship between the Laplace operator with frequency and the function of frequency varying with simulation time. The results show that the frequency domain model of liquid rocket engine components can be constructed by the declarative equation with the Laplace operator as the variable or the frequency domain mathematical model in the form of transfer matrix in MWorks. The system dynamic characteristics simulation can be completed by building the connect relationship, and the simulation results meet the accuracy requirements. The research results can provide reference for the application of MWorks in the dynamic characteristics simulation of liquid rocket engine system.

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