Spacecraft attitude control method considering uncertainty of flywheel

A technology of uncertainty and attitude control, applied in attitude control and other directions, can solve problems such as inability to guarantee

Active Publication Date: 2019-01-08
BEIHANG UNIV
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Problems solved by technology

This method also cannot guarantee that under the condition of flywheel uncertainty (installation deviation and fail

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  • Spacecraft attitude control method considering uncertainty of flywheel
  • Spacecraft attitude control method considering uncertainty of flywheel
  • Spacecraft attitude control method considering uncertainty of flywheel

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Embodiment Construction

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0060] Such as figure 1As shown, the steps of the spacecraft attitude control method considering the flywheel uncertainty of the present invention are as follows: first, the relative attitude motion between the tracking spacecraft and the free-rolling failure spacecraft based on considering the flywheel uncertainty (installation deviation and failure), A new tracking spacecraft attitude tracking dynamic model can be obtained without the small angle approximation operation of the flywheel installation deviation; then a new type of non-singular fixed-time anti-unwinding sliding mode surface is constructed by using the relevant motion parameters of the spacecraft attitude tracking; Finally, an adaptive fault-tolerant sliding mode attitude tracking controller is designed to track ...

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Abstract

The invention discloses a spacecraft attitude control method considering the uncertainty of a flywheel. The spacecraft attitude control method comprises the following steps of: in a case of considering that an attitude control mechanism of a tracking spacecraft, i.e., the flywheel, has the uncertainty, establishing an attitude tracking kinetic model between the tracking spacecraft and a free tumbling failure spacecraft; designing a nonsingular fixed time anti-unwinding sliding mode surface; and constructing an adaptive fault-tolerant sliding mode attitude tracking controller of the tracking spacecraft, and giving out a flywheel installation deviation angle range in which the controller can process a deviation angle. The control method disclosed by the invention has the characteristics of short response time, high robustness of the controller, energy saving and the like, and is suitable to apply to an attitude tracking control task that the tracking spacecraft with the flywheel uncertainty (installation deviation and fault) completes observation on the free tumbling failure spacecraft.

Description

technical field [0001] The invention relates to a spacecraft attitude control method considering flywheel uncertainty, which is mainly applied to tracking spacecraft to complete attitude tracking control for free-rolling invalid spacecraft when flywheel installation deviation and failure occur, and belongs to the technical field of spacecraft attitude control. Background technique [0002] The world's exploration of outer space has been deepening, which has greatly promoted the rapid development of human spaceflight. The article "Made in China 2025" clearly stated that it aims to improve the level of aerospace equipment and technology, and listed it as a key area that needs breakthrough development. In view of the early space exploration, communication, weather forecast and other tasks, a large number of failed spacecraft appeared in space. At present, countries urgently need to observe and maintain the launched spacecraft, especially the out-of-control target spacecraft, t...

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Application Information

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IPC IPC(8): G05D1/08
Inventor 胡庆雷陈巍董宏洋郭雷
Owner BEIHANG UNIV
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