A method for monitoring the impact of space debris on the airtight cabin of a special-shaped spacecraft

Abstract

A method for monitoring the impact of space debris on the airtight cabin of a special-shaped spacecraft, using the acoustic emission signal generated by the impact of space debris on the airtight cabin and the air pressure drop rate in the airtight cabin to sense and locate the impact event and judge whether the airtight cabin is broken down by space debris , which can meet the on-orbit status monitoring requirements of the sealed cabin of the special-shaped spacecraft, and belongs to the field of spacecraft structural health monitoring. The present invention judges whether the impact is an ultra-high-speed impact event of space debris through the spectrum characteristics of the acoustic emission signal, determines the impact position through a sample-based area positioning algorithm, and determines whether the airtight cabin is broken down by space debris in combination with the air pressure drop rate in the sealed cabin. Thus, the three-level monitoring of the space debris impact event on the sealed cabin of the special-shaped spacecraft is realized.

Description

technical field [0001] The invention relates to a method for monitoring the impact of space debris on a sealed cabin of a special-shaped spacecraft, which uses the acoustic emission signal generated by the impact of space debris on the sealed cabin and the air pressure drop rate in the sealed cabin to sense and locate the impact event and whether the sealed cabin is broken down. Monitoring, which can meet the on-orbit status monitoring requirements of special-shaped structures in spacecraft airtight cabins, belongs to the field of spacecraft structural health monitoring. Background technique [0002] With the continuous development of human spaceflight activities, the space debris environment continues to deteriorate, which poses a great threat to the safety of long-life manned spacecraft in orbit, and poses a threat to the life safety of astronauts in orbit. The demand for on-orbit status monitoring is increasingly urgent. [0003] The monitoring technologies for spacecraf...

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Problems solved by technology

[0004] At present, the impact monitoring methods based on acoustic emission technology at home and abroad are only suitable for simple engineering structures, such as flat plate structures or cylindrical shell structures, and cannot meet the needs of real spacecraft with special-shaped structures (non-uniform wall thickness, hatches or portholes, and outer envelopes of Combination of cone, sphere or cylinder) impact monitoring requirements

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