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Active satellite attitude and tethered librational and vibrational combination control method based on tethered dragging system

A joint control and active star technology, applied in attitude control and other directions

Active Publication Date: 2016-06-22
BEIHANG UNIV
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Problems solved by technology

[0004] At present, the research on tethered towing technology for space targets is mostly focused on the target acquisition stage, and the research on the dynamics and control of the dragging orbit change stage is still in its infancy.

Method used

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  • Active satellite attitude and tethered librational and vibrational combination control method based on tethered dragging system
  • Active satellite attitude and tethered librational and vibrational combination control method based on tethered dragging system
  • Active satellite attitude and tethered librational and vibrational combination control method based on tethered dragging system

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Embodiment Construction

[0276] The present invention is a combined control method of active satellite attitude and tether shimmy based on a tethered dragging system. The preferred implementation modes of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0277] Firstly, the system dynamics model is established, and the control method of adaptive sliding mode controller + sliding mode observer is used to design the controller for each channel. Finally, the invented control method is simulated and verified. The method block diagram of the present invention is as figure 1 shown.

[0278] Step 1. Establish a system dynamics model

[0279] First, establish the orbital coordinate system S o : The z-axis points from the earth to the center of mass of the TSS along the line connecting the centers of the earth, the x-axis is located in the orbital plane of the center of mass of the TSS, is perpendicular to the z-axis and points to the direction of orbita...

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Abstract

The invention discloses an active satellite attitude and tethered librational and vibrational combination control method based on a tethered dragging system, and the method comprises the following specific steps: 1, building a system dynamics model; 2, carrying out the designing of an adaptive sliding-mode controller; 3, carrying out the designing of a high-order sliding-mode observer; 4, carrying out MATLAB numerical simulation analysis. The analysis of a simulation result indicates that the method effectively inhibits the tether spatial swinging, eliminates the active satellite attitude coupling movement cause by the basis of a tethering point, is better in robustness of a control law, and is good in application prospect in this type of space tasks.

Description

technical field [0001] The invention relates to a joint control method of active star attitude and tether shimmy when the active star and the target star are in the free accompanying flight state during the dragging and de-orbiting process of the space target tether, and belongs to the technical field of tethered satellites in aerospace engineering. Background technique [0002] The tethered deorbiting technology of space objects is a new type of assisted deorbiting strategy proposed by the aerospace engineering community. The general process of tether dragging and de-orbiting is that the active star carrying the capture equipment such as flying nets approaches the target star through orbital maneuvering, releases and expands the flying nets to capture, and then controls and tightens the tethers through the hoisting mechanism to form a dragging system, and then relies on the active star. orbital maneuvering to achieve the target orbit change operation. [0003] The combinat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/08
CPCG05D1/08
Inventor 郝志丹贾英宏钟睿金磊朱宏玉
Owner BEIHANG UNIV
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