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A direct solution method of unbiased current attitude during satellite maneuvering imaging

A mobile imaging and satellite technology, applied in the interpretation of photos, camera devices, etc., can solve the problems of drastic changes in angular velocity and large amount of computation, and achieve the effect of reducing the amount of computation and avoiding iterative calculation of drift angle

Active Publication Date: 2021-12-24
SHANGHAI AEROSPACE CONTROL TECH INST
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Problems solved by technology

However, for the imaging problem of the satellite attitude maneuver process, the star attitude and angular velocity change drastically. In order to achieve high-precision drift angle tracking target attitude planning, iterative calculation of the camera drift angle model must be performed multiple times in the same control cycle, and the amount of calculation is large.

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  • A direct solution method of unbiased current attitude during satellite maneuvering imaging
  • A direct solution method of unbiased current attitude during satellite maneuvering imaging
  • A direct solution method of unbiased current attitude during satellite maneuvering imaging

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Embodiment Construction

[0062] based on the following Figure 1 ~ Figure 4 , specifically explain the preferred embodiment of the present invention.

[0063] Such as figure 1 As shown, the present invention provides a method for directly solving the non-bias attitude in the process of satellite maneuvering imaging, comprising the following steps:

[0064] Step S1. Calculate the component of the optical axis vector of the spaceborne camera in the orbital coordinate system according to the mission plan and its derivative in the orbital coordinate system

[0065] Step S2. Calculate the expected Euler angle of the spaceborne camera coordinate system relative to the orbital coordinate system rolling axis according to the optical axis vector constraint and the pitch axis expected Euler angle θ, and further calculate the derivative of the expected Euler angle and

[0066] Step S3, according to the constraint that the direction of the image movement velocity must be consistent with the direction ...

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Abstract

A direct solution method for the unbiased current attitude in the process of satellite maneuvering imaging, through the derivation of the image motion velocity vector in the imaging coordinate system, using the camera optical axis pointing constraint and the image motion velocity direction constraint, the unbiased current in the satellite maneuvering imaging process is given The direct solution method of the attitude avoids the iterative calculation of the drift angle and greatly reduces the calculation amount of the on-board software.

Description

technical field [0001] The invention relates to a method for directly solving the non-bias current attitude in the process of satellite maneuvering imaging. Background technique [0002] Dynamic imaging technology refers to the imaging method in which the satellite turns on the camera for "moving shooting" imaging during the three-axis attitude maneuvering process, and adjusts the optical axis to the ground pointing in real time during the imaging process, so as to realize the imaging method that the attitude pointing to the ground is constantly changing. The dynamic imaging method uses the maneuvering of the satellite attitude to solve the contradiction between wide width and high resolution. After having a considerable ability in attitude control stability, push-broom imaging is adopted during the attitude maneuvering process, thereby greatly improving the image coverage. ability. Among them, the angular velocity of the attitude maneuver can be either along the flight dir...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C11/34G01C11/02
CPCG01C11/34G01C11/02
Inventor 杜宁陈文晖王世耀徐家国吕若宁孙杰查理高四宏邵志杰
Owner SHANGHAI AEROSPACE CONTROL TECH INST