Journal
OCEAN ENGINEERING
Volume 201, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2020.107107
Keywords
Fixed-time fault-tolerant control; Trajectory tracking; Marine surface vessels (MSVs); Fixed-time sliding mode control (FXSMC); Fixed-time extended state observer (FXESO)
Funding
- National Natural Science Foundation of China [51809113]
- Natural Science Foundation of Liaoning Province, China [20180520036]
- Fundamental Research Funds for the Central Universities of China [3132018129]
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In this paper, a novel fixed-time fault-tolerant control scheme is proposed for trajectory tracking of marine surface vessels (MSVs). A fixed-time extended state observer (FXESO) is developed to enhance the robustness. In conjunction with the FXESO, a fixed-time sliding mode control (FXSMC) law is applied to trajectory tracking control. The designed tracking control system can be stabilized to the origin in fixed time in the presence of actuator faults (AF), unmodelled dynamics, unmeasurable system states and exogenous disturbances. Specially, the convergence time of the system is independent of the initial states of an MSV. Meanwhile, a complete proof of closed-loop fixed-time stability is given. Finally, comparative simulations manifest the performance and advantage of the developed fixed-time control method.
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