|Table of Contents|

Pressure control characteristics of switch-type storage and supply system regulated by Bang-Bang valve (PDF)

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

Issue:
2023年02期
Page:
74-82
Research Field:
目次
Publishing date:

Info

Title:
Pressure control characteristics of switch-type storage and supply system regulated by Bang-Bang valve
Author(s):
GU Dalu;  ZENG Weiliang;  LEI Xiaofei;  JIN Hongrui
(Xi'an Aerospace Propulsion Institute, Xi'an 710100, China)
Keywords:
switch-type storage and supply system;  decompression module;  Bang-Bang valve;  pressure control characteristic;  decompression period
PACS:
V433
DOI:
-
Abstract:
In view of the technical difficulties of a radio-frequency ion electric propulsion xenon gas storage and supply system with long-term in-orbit and high precision decompression, a switch-type storage and supply system based on dual frictionless solenoid valve with Bang-Bang control is proposed.A pneumatic-control-electromagnetic-mechanical dynamic mathematical model of the decompression module is established, and a simulation model of working characteristics for the switch-type storage and supply system were established based on the AMESim platform is built.The variation of output pressure in the buffer tank with time for the decompression module of the storage and supply system is simulated.The effects of inlet pressure, buffer tank volume and intermediate chamber volume on pressure control characteristics are analyzed.The results show that the Bang-Bang valve can supply only a small amount of gas to the buffer tank during a decompression period by means of specific distributed switch control mode, which ensures that the output pressure of buffer tank can be continuously stable within the lower and upper limit of the set pressure, and achieves the long-term and high-precision decompression requirements of xenon gas from 550 kPa to 60 kPa.The inlet pressure has a great influence on the pressure control performance of decompression module.The higher the inlet pressure is, the lower the pressure control precision of storage and supply system is.The simulation results of decompression module of storage and supply system are in good agreement with the experimental results, which verifies the correctness of the simulation model and results.

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