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- Title
Fixed-time sliding mode attitude tracking control for a submarine-launched missile with multiple disturbances.
- Authors
Zhang, Liang; Wei, Changzhu; Jing, Liang; Cui, Naigang
- Abstract
This paper studies a novel adaptive fixed-time sliding mode attitude tracking control for a submarine-launched missile, which is affected by sea winds, sea waves, ocean currents and other disturbances during the water-exit process. Firstly, the nonlinear water-exit dynamic model of the submarine-launched missile is established, and then it is transformed into a simple second-order attitude tracking system. Subsequently, a novel non-singular fixed-time fast terminal sliding mode surface (NFFTSMS) with fixed-time convergence is presented, and the pre-established settling time is also developed. Moreover, a novel adaptive non-singular fixed-time fast terminal sliding mode control (ANFFTSMC) is presented by employing a fixed-time disturbance observer, a fixed-time differentiator and the proposed NFFTSMS. Closed-loop stability of the proposed controller is proved by utilizing the Lyapunov methodology. Finally, numerical simulations including two typical launch trajectories of the missile are carried out to demonstrate the strong robustness of the proposed control scheme.
- Subjects
SLIDING mode control; TRACKING control systems; LAUNCHING of guided missiles; NONLINEAR systems; OCEAN waves; OCEAN currents
- Publication
Nonlinear Dynamics, 2018, Vol 93, Issue 4, p2543
- ISSN
0924-090X
- Publication type
Article
- DOI
10.1007/s11071-018-4341-8