Modelling and high-gain adaptive control of chaotic yawing of ship under wave disturbance.

In order to describe and solve chaotic yawing in straight-line navigation, taking large tanker Davis Sea as an example, the yawing model and corresponding high-gain adaptive controller is established. Chaotic yawing is proved to exist. Mathematical analysis indicates the error of the controlled system is globally ultimately bounded. Simulation results show the proposed control law is effective and robust to model perturbation. Compared with sliding mode control, the accuracy of proposed method is 69.9% better and the control energy consumption is 32.6% smaller. [ABSTRACT FROM AUTHOR]