Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (3): 779-788.doi: 10.12305/j.issn.1001-506X.2021.03.23

• Guidance, Navigation and Control • Previous Articles     Next Articles

Three-dimensional adaptive finite-time super-twisting sliding mode guidance law

Jun LI(), Yuxin LIAO(), Jun LI()   

  1. School of Aeronautics and Astronautics, Central South University, Changsha 410083, China
  • Received:2020-06-05 Online:2021-03-01 Published:2021-03-16

Abstract:

Aiming at the guidance problem of intercepting maneuvering target with fixed terminal attack angle, a three-dimensional adaptive finite-time super-twisting sliding mode guidance law is proposed. Firstly, the three-dimensional guidance problem is transformed into the control problem of the second-order line-of-sight angle system by using the relative motion particle model. Secondly, a multi-variable nonsingular fast terminal sliding surface is constructed, and the finite-time super-twisting sliding mode guidance law is designed by combining the improved super-twisting algorithm. At the same time, the upper bound of external disturbance caused by target maneavering is estimated online by parameter adaptive gain, and the adaptive finite-time super-twisting sliding mode guidance law is designed. Then, the finite-time convergence performance of the closed-loop system is analyzed by using the Lyapunov stability theory. Finally, the simulation results show that the proposed method has better robustness and higher terminal attack angle control accuracy while ensuring good interception accuracy.

Key words: nonsingular fast terminal sliding mode, terminal attack angle constraint, super-twisting algorithm, finite-time convergence, three-dimensional interception guidance law

CLC Number: 

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