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Front. Inform. Technol. Electron. Eng.  2012, Vol. 13 Issue (5): 328-338    DOI: 10.1631/jzus.C1100350
    
Composite disturbance attenuation based saturated control for maintenance of low Earth orbit (LEO) formations
Jian-cheng Fang, Ke Sun
National Key Laboratory of Inertial Technology, Beihang University, Beijing 100191, China; Novel Inertial Instrument & Navigation System Technology Key Laboratory of Fundamental Science for National Defense, Beihang University, Beijing 100191, China
Composite disturbance attenuation based saturated control for maintenance of low Earth orbit (LEO) formations
Jian-cheng Fang, Ke Sun
National Key Laboratory of Inertial Technology, Beihang University, Beijing 100191, China; Novel Inertial Instrument & Navigation System Technology Key Laboratory of Fundamental Science for National Defense, Beihang University, Beijing 100191, China
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摘要： Maintenance of high performance formation control is important for low Earth orbit (LEO) formation missions of small spacecraft. In this paper, a model of nonlinear relative motion dynamics is built, and then nonlinear and important perturbations affecting the formation configuration, such as J2 and atmospheric drag, are analyzed as disturbances. Global navigation satellite system based relative positioning with nonlinear filtering is adopted to provide state information associated with the perturbations. By combining disturbance observer based control with H∞ state feedback, a composite disturbance attenuation controller is proposed for maintenance of continuous and accurate formation. With consideration of precise control relying on micro thrusters, a composite disturbance attenuation based saturated controller is designed and its stability is proved. Finally, through numerical simulations, we demonstrate that control accuracy is improved after effectively avoiding perturbations and that stabilization can be satisfied using this method.
关键词： Formation maintenance;  Perturbation;  Disturbance attenuation;  H∞ state feedback;  Saturated control    
Abstract: Maintenance of high performance formation control is important for low Earth orbit (LEO) formation missions of small spacecraft. In this paper, a model of nonlinear relative motion dynamics is built, and then nonlinear and important perturbations affecting the formation configuration, such as J2 and atmospheric drag, are analyzed as disturbances. Global navigation satellite system based relative positioning with nonlinear filtering is adopted to provide state information associated with the perturbations. By combining disturbance observer based control with H∞ state feedback, a composite disturbance attenuation controller is proposed for maintenance of continuous and accurate formation. With consideration of precise control relying on micro thrusters, a composite disturbance attenuation based saturated controller is designed and its stability is proved. Finally, through numerical simulations, we demonstrate that control accuracy is improved after effectively avoiding perturbations and that stabilization can be satisfied using this method.
Key words: Formation maintenance    Perturbation    Disturbance attenuation    H∞ state feedback    Saturated control
收稿日期: 2011-11-28 出版日期: 2012-05-03
CLC:  V529.1  
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Jian-cheng Fang
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引用本文:

Jian-cheng Fang, Ke Sun. Composite disturbance attenuation based saturated control for maintenance of low Earth orbit (LEO) formations. Front. Inform. Technol. Electron. Eng., 2012, 13(5): 328-338.

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http://www.zjujournals.com/xueshu/fitee/CN/10.1631/jzus.C1100350    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2012/V13/I5/328

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