Method for monitoring space debris impact on spacecraft sealed cabin of special-shaped structure

Abstract

The invention discloses a method for monitoring space debris impact on a spacecraft sealed cabin of a special-shaped structure. Impact event perception and positioning and judgment on whether the sealed cabin is broken down by the space debris are carried out by utilizing an acoustic emission signal generated when the space debris impacts the sealed cabin and the air pressure drop rate in the sealed cabin, the on-orbit state monitoring requirement of the spacecraft sealed cabin of the special-shaped structure can be met, and the method belongs to the field of spacecraft structure health monitoring. Whether impact is a space debris superspeed impact event or not is judged according to the frequency spectrum characteristics of the acoustic emission signals; an impact position is determined through a sample-based region positioning algorithm, and whether the sealed cabin is broken down by space debris is judged in combination with an air pressure drop rate in the sealed cabin, so that three-stage monitoring of a space debris impact event of the spacecraft sealed cabin of the special-shaped structure 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...

AI Technical Summary

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

Images