TITLE:
Fixed Time Control of Dynamic Positioning Ship with Unknown Interference
AUTHORS:
Peng Xu
KEYWORDS:
Dynamic Positioning, Fixed-Time Observer, Sliding Mode Control
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.10 No.5,
May
27,
2020
ABSTRACT: This
paper proposes a fixed-time control scheme to ensure that the dynamic
positioning can accurately reach the specified position under external
interference. A fixed-time state observer was developed to accurately estimate
the total external unknown interference. Based on the dynamic positioning ship
motion model, the inversion design method is used to ensure the stability of
the system and eliminate various uncertain effects. A fixed-time backstepping
sliding mode controller is designed. Finally, the simulation results show that
the method has good performance and advantages.