Journal of Astronautics ›› 2016, Vol. 37 ›› Issue (6): 711-719.doi: 10.3873/j.issn.1000-1328.2016.06.011

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Whole Channel Adaptive Control for Hypersonic Vehicle Considering Characteristic Model

DU Li fu, HUANG Wan wei, LIU Xiao dong, CAI Gao hua   

  1. Beijing Aerospace Automatic Control Institute, Beijing 100854, China
  • Received:2015-04-21 Revised:2015-07-30 Online:2016-06-15 Published:2016-06-25


Considering that a hypersonic vehicle has strong nonlinearity,high uncertainty and strong coupling,this paper proposes an attitude control law design method, which is based on a combination of feedback linearization control and characteristic model-based adaptive control, in order to improve the rapidity, robustness and adaptability of the flight control systems. Firstly, the whole-channel nonlinear coupling dynamics model for the hypersonic vehicle is established. Secondly, the whole-channel nonlinear coupled system is changed into the approximate decoupling linear system using the feedback linearization control method. Then the output feedback control law is designed for the decoupled linear system which can ensure the system’s stability and rapidity. For the question that the feedback linearization control system relies on the accurate mathematical model and is sensitive to the modeling errors and external disturbance, an adaptive control law is designed based on the error characteristics model in order to ensure the robustness and adaptability of the system. Finally, the correctness and effectiveness of this control law are verified by simulation. The simulation results show that this attitude control system can track instructions well and has strong robustness and adaptability.

Key words: Hypersonic vehicle, Whole-channel, Feedback linearization, Characteristic model, Adaptive control

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