Abstract
In this paper, output feedback boundary control of a flexible marine riser coupled with the internal fluid dynamics is investigated. By merging Lyapunov's direct method, boundary control technique and high-gain observers, an output feedback boundary control with disturbance observer is proposed to suppress the riser's vibration and deal with the effects of the external environment disturbance. The stability of the closed-looped system is achieved without any discretisation or simplification of the dynamics in the time and space, thus the control spillover will not arise. Simulation results are provided to verify the effectiveness of the proposed output feedback boundary control.
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