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Modal measurement method of large-scale expandable flexible body in space based on video acquisition

A technology of video collection and measurement methods, applied to the interpretation of photos, etc., can solve problems such as no explanation or report found, no data collected, etc.

Active Publication Date: 2018-02-09
SHANGHAI SATELLITE ENG INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, the simulation model is difficult to fully reflect the various influencing factors in actual engineering
[0004] At present, there is no description or report of the similar technology of the present invention, and no similar data at home and abroad have been collected yet.

Method used

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  • Modal measurement method of large-scale expandable flexible body in space based on video acquisition
  • Modal measurement method of large-scale expandable flexible body in space based on video acquisition
  • Modal measurement method of large-scale expandable flexible body in space based on video acquisition

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0032] The invention provides a method for measuring the mode of a large-scale expandable flexible body in space based on video acquisition, relates to the field of spacecraft dynamics and control, and is a mode measurement method based on video acquisition of feature points. Including: video acquisition of several feature points installed on the flexible body; obtaining the actual displacement of the feature points in the object space through video image processing; extracting the main mode shape of the...

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Abstract

The present invention provides a video capture based modal measurement method of a space large deployable flexible body. The modal measurement methods based on characteristic point video capture comprises: conducting video capture of a plurality of characteristic points mounted on the flexible body; processing the video image to obtain the actual displacement of characteristic points in the object space; extracting a large flexible body modal principal mode obtained by finite element analysis software; and solving the flexible body modal coordinate through actual displacement of characteristic points and the modal principal mode. The video capture method does not add wires and sensor weight to the flexible body, does not affect the structure weight characteristics of the flexible body, and can accurately obtain modal coordinates of the flexible body on an orbiting spacecraft.

Description

technical field [0001] The present invention relates to the technology of space vehicle dynamics, in particular, to a method for measuring the mode of a large-scale expandable flexible body in space based on video acquisition, especially for the on-orbit model of a space vehicle with a large-scale expandable flexible body. The method of measuring and calculating the state coordinates. Background technique [0002] The configuration of modern space vehicles is complex, often including large flexible bodies such as large solar panels and large antennas. During orbital flight, they are easily disturbed and controlled to cause structural vibrations, which will affect control accuracy at least, and endanger control stability at worst. Even aircraft safety. In order to obtain the vibration parameters of a large expandable flexible body in space, it is necessary to measure the modal coordinates of the flexible vibration to evaluate and improve the dynamic environment of the space ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C11/04
CPCG01C11/04
Inventor 吕旺洪振强王田野
Owner SHANGHAI SATELLITE ENG INST