Method for monitoring leakage in on-orbit state for spacecraft

Abstract

The invention provides a method for monitoring leakage in an on-orbit state for a spacecraft. The method comprises the following procedures of: monitoring pressure after partitioning cabins; injecting a neon gas in a capsule, and balancing; performing sampling analysis; performing mass flow analysis; and calculating a leak rate. According to the method provided by the invention, a pressure change monitoring method, a mass spectrum analysis method and a mass flow method are comprehensively applied to calculation and analysis of the leak rate of a space station in the on-orbit state comprehensively; the gas temperature inside the capsule is measured, as well as the changes of the total pressure, the oxygen partial pressure, the carbon dioxide partial pressure and the water vapor partial pressure are measured when the pressure is monitored; a pressure change monitoring system is used for monitoring the pressure change quantity in the capsule by comprehensively using pressure parameters measured by an environmental control and life support system; and the leak rate of a capsule body is accurately calculated by applying the mass spectrum analysis method and the mass flow method.

Description

Technical field [0001] The invention relates to a leakage monitoring method for the on-orbit state of a spacecraft, in particular to a leakage monitoring method for the on-orbit state of a space station cabin. Background technique [0002] Leakage is an important factor affecting the normal launch and operational failure of spacecraft, and it is also a major threat to manned space stations. The space station should be equipped with real-time monitoring of cabin pressure, cabin leakage fault detection and alarm, leakage location in the case of failure of the sealing structure, and rapid leakage plugging technology to avoid and reduce the occurrence of vicious accidents. The General Armament Department issued key technical guidelines for pre-research projects for manned spaceflight follow-up missions, requiring the study of space station orbital leak detection, positioning methods, and rapid leak detection technology, so that the space station can detect leaks in time during orbita...

AI Technical Summary

Problems solved by technology

[0004] 1) Although the pressure change leak detection method is intuitive and convenient, the space station’s on-orbit state leakage monitoring is not only affected by the temperature change and gradient in the cabin, but also by the comprehensive influence of the pressure adjustment of the environmental control and life support system, the consumption of astronauts, and the temperature and humidity changes in the cabin , these influencing factors are not only closely related to the pressure, but also their influencing values ​​are far beyond the leakage level of the International Space Station in orbit

[0005] 2) The traditional pressure change leakage monitoring method is applied to space station orbital leakage monitoring. The system structure is very complex, and it can only judge a large number of leakage faults. The evaluation is very rough and it is easy to misjudge

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