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Satellite relative attitude measuring method based on structure from motion

A technology for motion recovery structure and relative posture, which is applied in the interpretation of photos and other directions, and can solve problems such as complex stereoscopic imaging systems

Inactive Publication Date: 2012-07-25
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of relative attitude measurement system based on cooperative targets has the disadvantages of needing known or pre-fixed markers, which must be installed on the satellite to be measured, and a complex dual-camera stereo imaging system.

Method used

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  • Satellite relative attitude measuring method based on structure from motion
  • Satellite relative attitude measuring method based on structure from motion
  • Satellite relative attitude measuring method based on structure from motion

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Embodiment Construction

[0050] The embodiments of the present invention are described in detail below: the present embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation and specific operation process are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0051] Such as figure 1As shown, the satellite relative attitude measurement method based on the motion restoration structure provided by the present embodiment, through standard test sequence images, STK simulation data and semi-physical simulation image data, a total of three aspects of data are actually tested, and the implementation steps are as follows:

[0052] Step 1, firstly perform SIFT feature point extraction on the input sequence images respectively.

[0053] The SIFT (Scale Invariant Feature Transform) feature is an image local feature that maintains invariance to image translation, rotation, scaling, ...

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Abstract

The invention discloses a satellite relative attitude measuring method based on a structure from motion. The satellite relative attitude measuring method includes a first step, respectively extracting SIFT (scale invariant feature transform) feature points of inputted sequence images; a second step, matching the obtained SIFT feature points; a third step, realizing the structure from motion according to the matched feature points; a fourth step, optimizing structural parameters of the structure from motion by a light beam adjustment method; a fifth step, carrying out three-dimensional reconstruction according to the matched feature points and the optimized structural parameters of the structure from motion; and a sixth step, comprehensively displaying a spatial environment according to effective three-dimensional feature points and the structural parameters of the structure from motion. By the aid of the satellite relative attitude measuring method, relative attitudes of an observed satellite target can be effectively measured according to standard test data, satellite simulation data of a STK (satellite tool kit) ontrack satellite simulation platform and ground semi-physical simulation data, and the measurement precision for constructing a system and stability of computed numerical values can be improved by the aid of the light beam adjustment method.

Description

technical field [0001] The invention relates to a space target attitude measurement method, in particular to a satellite relative attitude measurement method based on a motion recovery structure. Background technique [0002] The space platform has the characteristics of a relatively fixed trajectory characterized by Kepler motion. Under the space-based background, the continuous observation of the space satellite platform using the monocular camera of the same platform has the characteristics of observation range, observation angle, observation distance and platform track limits. The ultra-short-range relative attitude measurement method of the space platform can provide satellites with relative attitude information relative to the observed target during the census of space junk, waste satellite recovery, satellite capture and other on-orbit maintenance tasks, as well as on-orbit satellite maintenance. The real-time relative attitude between the stars in the process is dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/04
Inventor 敬忠良潘汉金博肖刚
Owner SHANGHAI JIAO TONG UNIV
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