A visual detection and evaluation method for micro-impact damage of in-orbit spacecraft

Abstract

The invention discloses a visual detection and evaluation method for small impact damage of an in-orbit spacecraft, which comprises the following steps: expressing the thermal image sequence of the spacecraft impact damage specimen acquired by an infrared thermal imager with a three-dimensional matrix; selecting from the three-dimensional matrix The pixel point corresponding to the transient thermal response with the smallest rate of rise; determine the size of the block based on the transient thermal response with the minimum rate of rise; perform block and determine the search step size in the block; select the transient thermal response by block and step size; The selected transient thermal responses are classified; based on the SC-SD spectral clustering algorithm, dynamic prediction is realized and multi-objective optimization is performed to select representatives of each type of transient thermal response; the actual defect category number is discriminated based on the Spearman correlation coefficient, and according to The actual defect category number matrix is ​​changed to obtain a two-dimensional image; the regional convolutional neural network R-CNN is used to extract the features of the two-dimensional image, and the defect feature image of the spacecraft impact damage test piece is obtained, so as to realize the visual detection and evaluation of tiny impact damage .

Description

technical field [0001] The invention belongs to the technical field of spacecraft space debris impact damage detection and evaluation, and more specifically, the invention relates to a visual detection and evaluation method for on-orbit spacecraft micro-impact damage. Background technique [0002] With the continuous development of human space activities, the increasing amount of space debris poses a great threat to human space activities and the safety of on-orbit spacecraft. The problem of space debris has become a gradually developing and serious problem in human space development and practice. Reality. In particular, the huge amount of tiny space debris below the centimeter level that exists in the earth's orbit has become a potential killer that threatens orbiting spacecraft and astronauts due to the inability to effectively monitor, warn, and actively avoid. Space accidents are common. When various spacecraft are impacted by space debris, how to realize the acquisiti...

AI Technical Summary

Problems solved by technology

In the original patent, the index representing the degree of change in the dynamic multi-objective environment adopts a simple arithmetic mean value, which makes it too sensitive to extreme function value changes

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