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Fixed time terminal sliding mode robust fault-tolerant control method and device for liquid-filled spacecraft

A liquid-filled spacecraft, fault-tolerant control technology, applied in the field of spacecraft research, can solve problems such as imperfections

Inactive Publication Date: 2021-02-02
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there is no perfect fixed-time fault-tolerant control method for large-angle attitude maneuvers of liquid-filled spacecraft with actuator failure and input saturation.

Method used

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  • Fixed time terminal sliding mode robust fault-tolerant control method and device for liquid-filled spacecraft
  • Fixed time terminal sliding mode robust fault-tolerant control method and device for liquid-filled spacecraft
  • Fixed time terminal sliding mode robust fault-tolerant control method and device for liquid-filled spacecraft

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Embodiment 1

[0039] figure 1 This is a schematic flowchart of a fixed-time terminal sliding mode robust fault-tolerant control method for a liquid-filled spacecraft provided in Embodiment 1 of the present invention. The method disclosed in the embodiment of the present invention is suitable for a fixed-time terminal sliding mode robust control method for a liquid-filled spacecraft. Fault tolerant control device. like figure 1 As shown, the method may include the following steps:

[0040] S110 , constructing a coupled dynamics model of the liquid-filled spacecraft based on the viscous spherical pendulum model of liquid sloshing.

[0041] The coupled dynamics model includes the system dynamics equation of the liquid-filled spacecraft, the actuator failure model of the liquid-filled spacecraft and the attitude dynamics equation of the liquid-filled spacecraft.

[0042] Specifically, considering the advantages of good computing performance and overcoming singularity, the present invention u...

Embodiment 2

[0227] An embodiment of the present invention also provides a fixed-time terminal sliding mode robust fault-tolerant control device for a liquid-filled spacecraft, including: a processor, which is configured to implement the liquid-filled aerospace vehicle having any of the features of the above embodiments when executing a computer program A fixed-time terminal sliding mode robust fault-tolerant control method for the controller.

[0228] Figure 12 A schematic structural diagram of a fixed-time terminal sliding mode robust fault-tolerant control device for a liquid-filled spacecraft provided in Embodiment 2 of the present invention, as shown in Figure 12 As shown, the fixed-time terminal sliding mode robust fault-tolerant control device of the liquid-filled spacecraft includes a processor 20, a memory 21, an input device 22 and an output device 23; the fixed-time terminal sliding-mode robust fault-tolerant control device of the liquid-filled spacecraft The number of proces...

Embodiment 3

[0233] Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, implements a fixed-time terminal sliding mode of a liquid-filled spacecraft as provided by the embodiments of the present invention A robust fault-tolerant control method, the method may specifically be, but not limited to, the contents disclosed in the above method embodiments.

[0234] The computer storage medium in the embodiments of the present invention may adopt any combination of one or more computer-readable mediums. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or any combination of the above. More specific examples (a non-exhaustive list) of com...

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Abstract

The embodiment of the invention discloses a fixed time terminal sliding mode robust fault-tolerant control method and device for a liquid-filled spacecraft. The method comprises the following steps: constructing a coupling kinetic model of a liquid-filled spacecraft based on a viscous spherical pendulum model of liquid sloshing; and designing a robust adaptive fault-tolerant control strategy for the coupling dynamics model based on a fixed time control strategy and an adaptive control algorithm. According to the scheme provided by the invention, the singularity problem existing in a terminal sliding mode control scheme can be overcome, and meanwhile, the state of the liquid-filled spacecraft is ensured to be quickly converged to a fixed-time sliding mode surface.

Description

technical field [0001] The invention relates to the field of spacecraft research, in particular to a fixed-time terminal sliding mode robust fault-tolerant control method and device for a liquid-filled spacecraft. Background technique [0002] The mass of the liquid fuel propellant carried by modern spacecraft accounts for an ever-increasing proportion of the total spacecraft mass. Due to the geometry of the liquid storage cavity and the complexity of the external environment of the spacecraft, the sloshing force and sloshing moment generated by the liquid fuel have a significant impact on the overall mass of the spacecraft. System dynamics have a significant impact, resulting in liquid sloshing dynamics and attitude control, which has become one of the important issues in the aerospace industry. When designing the control system and analyzing the stability of the liquid-filled spacecraft, the equivalent mechanical model is usually incorporated into the process of modeling t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 宋晓娟王宏伟吕书锋王颖任月颖
Owner INNER MONGOLIA UNIV OF TECH
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