Forecasting method and system for evaluating satellite stability and pointing precision in-orbit performance

A technology of pointing accuracy and stability, which is applied in the overall field of space vehicles, can solve problems that do not involve prediction methods, etc., and achieve the effect of reasonable process structure and convenient use

Active Publication Date: 2021-07-02
SHANGHAI SATELLITE ENG INST
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Problems solved by technology

The article does not address forecasting methods applicable to star observations by spaceborne cameras

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  • Forecasting method and system for evaluating satellite stability and pointing precision in-orbit performance
  • Forecasting method and system for evaluating satellite stability and pointing precision in-orbit performance
  • Forecasting method and system for evaluating satellite stability and pointing precision in-orbit performance

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Embodiment Construction

[0078] 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.

[0079] Such as Figure 1-2 As shown, the present invention proposes a star prediction method suitable for evaluating satellite stability and pointing accuracy on-orbit performance, which can ensure that the satellite can search for a target star that is convenient for observation during the orbit, and is an evaluation of high-precision satellite stability and pointing accuracy Provide support.

[0080] The present invention comprises the following steps:

[0081] S1, calculate the strong light protect...

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Abstract

The invention provides a forecasting method and system for evaluating satellite stability and pointing precision in-orbit performance. The forecasting method comprises the following steps of S1, calculating a highlight protection angle of a star sensor, S2, calculating a strong light protection angle of the optical camera, S3, calculating an effective arc section of fixed star observation, and obtaining fixed star observation opportunity information, S4, calculating the projection of the optical axis vector of the optical camera in the inertial space, and S5, selecting a fixed star of which the maneuvering angle and the brightness both meet the requirements near the optical axis direction of the camera, obtaining the position and magnitude information of the target fixed star, and obtaining forecasting result information for evaluating the satellite stability and the pointing precision in-orbit performance. The method searches the fixed star suitable for satellite observation, predicts the fixed star observation opportunity, provides accurate fixed star position and star magnitude information, and provides support for evaluation of high-precision satellite stability and pointing precision.

Description

technical field [0001] The invention relates to the overall technology of space vehicles, in particular to a method and system for evaluating the on-orbit performance of satellite stability and pointing accuracy. Background technique [0002] Attitude stability and pointing accuracy are important indicators of satellite platforms, which are directly related to the success or failure of satellite missions in orbit. In recent years, with the continuous development of my country's remote sensing satellites, users have higher and higher requirements for the quantitative application of satellites. As the core indicators of satellite platforms, the requirements for satellite attitude stability and pointing accuracy are getting higher and higher. [0003] Conventional satellite attitude stability and pointing accuracy evaluation methods use star sensors and gyroscopes. However, with the continuous improvement of satellite attitude stability and pointing accuracy requirements, tra...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 吕旺黄庆龙张伟王田野周徐斌信思博俞航
Owner SHANGHAI SATELLITE ENG INST
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