Ship Dynamic Positioning Decoupling Control Based on ADRC

In this paper, the situation of dynamic positioning ships operated in some special speed is considered, and the nonlinear ship motion model of three degrees of freedom that contains nonlinear velocity term is established. Based on active disturbance rejection theory, a kind of active disturbance rejection decoupling control method is applied in ship dynamic positioning system; compared with the closed-loop system with PID controllers, the simulation results show that ADRC possesses an advantage in decoupling and anti-interference.