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Large flexible spacecraft interference compensation method based on sliding mode disturbance observer

A technology of interference observer and compensation method, applied in the field of aerospace, can solve the problems of complex parameter adjustment and inability to guarantee the convergence speed of observation errors.

Active Publication Date: 2017-02-15
BEIHANG UNIV
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Problems solved by technology

However, the observation error convergence speed of traditional DOBC cannot be guaranteed, and parameter adjustment is more complicated

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  • Large flexible spacecraft interference compensation method based on sliding mode disturbance observer
  • Large flexible spacecraft interference compensation method based on sliding mode disturbance observer
  • Large flexible spacecraft interference compensation method based on sliding mode disturbance observer

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[0049] The objects and functions of the present invention and methods for achieving the objects and functions will be clarified by referring to the exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in various forms. The essence of the description is only to help those skilled in the relevant art comprehensively understand the specific details of the present invention.

[0050] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0051] The invention provides a large flexible spacecraft disturbance compensation method based on a sliding mode disturbance observer, such as figure 1 Shown is the design flow chart of the large flexible spacecraft interference compensation method based on the sliding mode interference o...

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Abstract

The invention provides a large flexible spacecraft interference compensation method based on a sliding mode disturbance observer. The compensation method comprises the following steps of a) establishing a spacecraft attitude control system [sigma1]; b) establishing an external system [sigma3], wherein the external system [sigma3] adopts an uncertain part of a spacecraft flexible appendage damping matrix and describes the sum of flexible oscillation and environment interference; c) designing a sliding mode disturbance observer, wherein the sliding mode disturbance observer estimates the value of the sum of flexible oscillation and environment interference; and d) combining a nominal controller and the sliding mode disturbance observer in the step c) to obtain a combined controller, wherein the combined controller compensates the sum of flexible oscillation and environment interference through the estimation value of the sum of flexible oscillation and environment interference.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a large flexible spacecraft disturbance compensation method based on a sliding mode disturbance observer. Background technique [0002] With the development of aerospace technology, high-precision attitude control technology has become a key technology for some spacecraft to realize their functions, such as communication satellites, remote sensing satellites, and space telescopes. Therefore, the problem of high-precision attitude control of spacecraft has become a research hotspot and difficulty in recent years. For rigid satellites, the dynamic model is relatively simple, and the corresponding control methods have been relatively perfect. In recent years, flexible spacecraft, especially flexible spacecraft with large attachments, has become an important direction of future aerospace development, such as the Japanese ETS-Ⅷ satellite. These large flexible satellites carry lig...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/04B64G1/244B64G1/245
Inventor 郭雷朱玉凯乔建忠张培喜许昱涵
Owner BEIHANG UNIV
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