|Table of Contents|

Control strategy and implement method of multi-stage pressure regulation for gas supply of gas generator(PDF)

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

Issue:
2021年03期
Page:
60-66
Research Field:
研究与设计
Publishing date:

Info

Title:
Control strategy and implement method of multi-stage pressure regulation for gas supply of gas generator
Author(s):
CHU Weihua; XIE Mingwei
Facility Design and Instrument Institute, China Aerodynamics Research and Development Center,Mianyang 621000, Sichuan China
Keywords:
gas generator;  annular gap pressure-regulating valve;  control strategy;  multi-stage pressure regulation;  control coupling
PACS:
TH41
DOI:
-
Abstract:
The coupling, pressure fluctuation and difficulty in fast convergence of pipeline pressure during the process of pressure regulation with two-stage pressure regulating valve for high-pressure gas supply lead to high combustion pulsation pressure, ignition delay and deflagration of the gas generator. A closed-loop pressure control strategy using the series circuit of position and pressure for two-stage pressure regulating valve is proposed. And through the analysis, the debugging method about the closed-loop target tracking curve of the first-stage pressure regulating valve and the optimal adjusting position of the second-stage pressure regulating valve is given. The control strategy and implementation method have been applied in the large-flow supply pressure regulating system of a gas generator, and the pressure regulation accuracy is better than 1%. The results show that the control strategy of first-stage position closed-loop and second-stage pressure closed-loop can well solve the pressure coupling problem in the adjustment process of the series pressure regulator, and the obtained method of debugging and optimal adjusting position is simple and effective.

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