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Acta Armamentarii ›› 2016, Vol. 37 ›› Issue (5): 840-850.doi: 10.3969/j.issn.1000-1093.2016.05.010

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Recursive Sliding Mode Control for Hypersonic Vehicle Based on Nonlinear Disturbance Observer

CHEN Chen, MA Guang-fu, SUN Yan-chao, LI Chuan-jiang   

  1. (School of Astronautics, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China)
  • Received:2015-08-06 Revised:2015-08-06 Online:2016-07-06
  • Contact: CHEN Chen E-mail:chenchen@hit.edu.cn

Abstract: A recursive terminal sliding-mode controller (RTSMC) with nonlinear disturbance observer (NDO) is proposed for the longitudinal dynamics model of generic hypersonic flight vehicle in the presence of external disturbances, unknown dead-zone nonlinearity and system uncertainties. RTSMC employs a recursive procedure which contains a set of terminal manifolds to make system tracking error converge to zero in a finite time. The dead-zone nonlinearity of the actuator is simplified as unknown input disturbance. For the compound disturbance generated by the external disturbances and system uncertainties, a novel NDO is developed, which can reduce the conservatism of RTSMC and eliminate the influence of dead-zone nonlinearity on system. The stability of the proposed control strategy is proved by means of Lyapunov theory. Several numerical examples are provided to compare and verify the proposed method.

Key words: control science and technology, hypersonic flight vehicle, recursive terminal sliding mode control, disturbance observer, disturbance rejection, dead-zone nonlinearity

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