On-orbit identification method of dynamic characteristics of solar sail deployment structure based on binocular vision measurement

Abstract

The invention discloses an on-orbit identification method of the dynamic characteristics of a solar sail deployment structure based on binocular vision measurement, which is used to solve the technical problem that the existing on-orbit identification method of the dynamic characteristics of a solar sail deployment structure has a small field of view and is difficult to implement . The technical solution is to use two cameras as visual sensors, apply image processing, digital image correlation, sub-pixel positioning and other methods to directly extract structural vibration displacement information from the image, and then obtain the dynamic characteristics of the structure in real time through the working mode analysis technology to realize the structure The on-orbit identification of dynamic characteristics has good identification accuracy. The camera is fixed on the camera bracket fixedly connected with the structure of the solar sail spacecraft. By fine-tuning the position and direction of the camera lens, the full-field monitoring of the structure of the entire sail surface can be realized, which is easy to realize.

Description

technical field [0001] The invention relates to an on-orbit identification method for the dynamic characteristics of a solar sail deployment structure, in particular to an on-orbit identification method for the dynamic characteristics of a solar sail deployment structure based on binocular vision measurement. Background technique [0002] The solar sail spacecraft is a large-scale membrane-expandable spacecraft composed of a large-area sail membrane and a supporting structure. It is of great significance to realize structural health monitoring on this basis. [0003] The document "Vibration Estimation of Flexible Space Structures using RangeImaging Sensors "The International Journal of Robotics Research", No. 25, 2006, pp. 1001-2023" discloses an on-orbit measurement of space flexible structures using a free-flying robot formation equipped with vision sensors. The conception of deformation, vibration and other information, and the use of 3D laser scanner combined with Kalma...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the existing on-orbit identification method of the dynamic characteristics of the solar sail deployment structure, the field of view of a single measurement is small and difficult to achieve, the present invention provides an on-orbit identification method of the dynamic characteristics of the solar sail deployment structure based on binocular vision measurement

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