Vibration Suppression and Nonlinearities Solution of a Flexible Riser System

In this paper, we address the vibration abatement problem of the flexible riser system preceded by mixed input nonlinear deadzone-saturation characteristic. By virtue of Lyapunov theory, auxiliary system and dead-zone inverse strategy, an anti-saturation control was put forward to restrain the vibration and remove the input nonlinearity effects. Employing the rigorous analysis, the designed control law is ensured to be uniformly bounded stability of the controlled system. Finally, simulations verify the theoretical result.