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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2017, Vol. 38 ›› Issue (3): 320287-320287.doi: 10.7527/S1000-6893.2016.0182

• Electronics and Electrical Engineering and Control • Previous Articles     Next Articles

Robust nonsingular Terminal sliding mode backstepping control for air-breathing hypersonic vehicles

WANG Xiao1, GUO Jie1, TANG Shengjing1, XU Qian2, MA Yueyue1,3, ZHANG Yao1   

  1. 1. School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China;
    2. Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China;
    3. Beijing System Design Institute of Electro-Mechanic Engineering, Beijing 100854, China
  • Received:2016-04-05 Revised:2016-06-06 Online:2017-03-15 Published:2016-06-12
  • Supported by:

    National Natural Science Foundation of China (11202024); Aeronautical Science Foundation of China (2012ZA720002)

Abstract:

A new nonlinear disturbance observer based Terminal sliding mode backstepping controller is proposed for flexible air-breathing hypersonic vehicles with parameter perturbations and external disturbances. The longitudinal vehicle model considering the elastic mode is expressed as strict feedback form. On the basis of traditional backstepping method, the nonsingular fast Terminal sliding mode is introduced to control the pitch angle and pitch rate, thus optimizing the control structure and enabling the system with finite time convergence property. A new nonlinear disturbance observer developed from tracking differentiator is then introduced to estimate and compensate the uncertainties including the derivatives of virtual control laws to improve the robustness of the controller, which avoids the explosion of differentiation terms. The system tracking error is proven to converge to zero in finite time with Lyapunov stability theory. Simulations demonstrate the effectiveness of tracking input commands with the designed controller in the presence of uncertainties.

Key words: hypersonic vehicles, sliding mode control, backstepping method, nonlinear disturbance observer, finite time convergence

CLC Number: