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Nonlinear suboptimal tracking control of spacecraft approaching a tumbling target |
Zhan-Peng Xu(许展鹏)1, Xiao-Qian Chen(陈小前)1, Yi-Yong Huang(黄奕勇)1, Yu-Zhu Bai(白玉铸)1, Wen Yao(姚雯)2 |
1 College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;
2 National Innovation Institute of Defense Technology, Chinese Academy of Military Science, Beijing 100091, China |
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Abstract We investigate the close-range relative motion and control of a spacecraft approaching a tumbling target. Unlike the traditional rigid-body dynamics with translation and rotation about the center of mass (CM), the kinematic coupling between translation and rotation is taken into consideration to directly describe the motion of the spacecraft's sensors or devices which are not coincident with the CM. Thus, a kinematically coupled 6 degrees-of-freedom (DOF) relative motion model for the instrument (feature point) is set up. To make the chaser spacecraft's feature point track the target's, an optimal tracking problem is defined and a control law with a feedback-feedforward structure is designed. With quasi-linearization of the nonlinear dynamical system, the feedforward term is computed from a specified constraint about the dynamical system and the reference model, and the feedback action is derived starting from the state-dependent Ricca equation (SDRE). The proposed controller is compared with an existing suboptimal tracking controller, and numerical simulations are presented to illustrate the effectiveness and superiority of the proposed method.
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Received: 15 March 2018
Revised: 13 June 2018
Accepted manuscript online:
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PACS:
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05.45.-a
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(Nonlinear dynamics and chaos)
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07.05.Dz
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(Control systems)
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91.10.Sp
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(Satellite orbits)
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Fund: Project supported by the Major Program of the National Natural Science Foundation of China (Grant Nos. 61690210 and 61690213). |
Corresponding Authors:
Xiao-Qian Chen
E-mail: chenxiaoqian@nudt.edu.cn
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Cite this article:
Zhan-Peng Xu(许展鹏), Xiao-Qian Chen(陈小前), Yi-Yong Huang(黄奕勇), Yu-Zhu Bai(白玉铸), Wen Yao(姚雯) Nonlinear suboptimal tracking control of spacecraft approaching a tumbling target 2018 Chin. Phys. B 27 090501
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