Systems Engineering and Electronics ›› 2023, Vol. 45 ›› Issue (9): 2884-2893.doi: 10.12305/j.issn.1001-506X.2023.09.28

• Guidance, Navigation and Control • Previous Articles     Next Articles

Space target compound pointing control method based on backstepping

Hong ZHANG1, Yunhua WU1,*, Shengjun ZHONG1, Haibo GUO2   

  1. 1. College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
    2. Shanghai Institute of Satellite Engineering, Shanghai 201108, China
  • Received:2022-11-04 Online:2023-08-30 Published:2023-09-05
  • Contact: Yunhua WU

Abstract:

A composite platform high precision control method composed of satellite platform and two-dimensional turntable is proposed for space moving target high precision attitude tracking. Firstly, the coupled dynamics model of the composite platform is established. Secondly, the backstepping controller is designed for the satellite to achieve coarse tracking. When the attitude error meets certain switching requirement, the two-dimensional turntable adopts the model predictive controller based on the loading observer to assist the satellite to perform the attitude precision tracking. In addition, the nonlinear disturbance observer is designed to estimate the disturbance torque generated by the coupled motion on the satellite body. Finally, the numerical simulation results show that the attitude accuracy of the proposed method can be improved by an order of magnitude, which can realize high-precision attitude tracking control, and provide research basis for engineering practice.

Key words: space moving target, dynamic tracking, composite platform, coupled dynamics, model predictive control

CLC Number: 

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