Volume 41 Issue 6
Nov.  2021
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Article Navigation >  Chinese Journal of Space Science  > 2021  >  41(6): 954-961
CHEN Gaojie, CHANG Lin, LI Jing, YANG Xiubin, YANG Chunlei, LI Yanbo. Configuration Keeping Control of Stereo Imaging with Dual-satellite Following Flying Formation[J]. Chinese Journal of Space Science, 2021, 41(6): 954-961. doi: 10.11728/cjss2021.06.954
Citation: CHEN Gaojie, CHANG Lin, LI Jing, YANG Xiubin, YANG Chunlei, LI Yanbo. Configuration Keeping Control of Stereo Imaging with Dual-satellite Following Flying Formation[J]. Chinese Journal of Space Science, 2021, 41(6): 954-961. doi: 10.11728/cjss2021.06.954
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Configuration Keeping Control of Stereo Imaging with Dual-satellite Following Flying Formation

doi: 10.11728/cjss2021.06.954 cstr: 32142.14.cjss2021.06.954

  • 1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033;

  • 2. University of Chinese Academy of Sciences, Beijing 100049;

  • 3. Key Laboratory of Space-based Dynamic and Rapid Optical Imaging Technology, Chinese Academy of Sciences, Changchun 130033;

  • 4. Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094

  • Received Date: 2020-09-17
  • Rev Recd Date: 2021-05-26
  • Publish Date: 2021-11-15
    Abstract
  • Aiming at the configuration maintenance problem of stereo imaging with micro double satellites under strong interference and output saturation, a composite anti-disturbance control strategy combining LQR optimal control and PD control is proposed. According to the relative orbit motion mechanism of dual-satellite following flying formation for stereo imaging, the dynamic modeling of relative motion is built with a dynamic analysis of double satellite following formation carried out, and the system motion state equation is obtained. Secondly, an adaptive disturbance observer is designed, which can estimate the system state and disturbance information at the same time. The existence condition of the observer is given by using Lyapunov stability theory and linear matrix inequality. In addition, the pole placement method is used to improve the observer dynamic performance, and the exponential attenuation factor is introduced to improve the convergence speed of the controller. Considering the output saturation characteristics of the actuator, a composite control strategy of weighted PD + LQR feedback and disturbance feedforward compensation is designed to suppress the influence of unknown disturbance and ensure the transient response and steady state performance of the system. Simulation results have verified the effectiveness of the proposed algorithm, which can provide configuration keeping control strategy for dual star stereo imaging.

     

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