Network-based active control for offshore steel jacket platforms

Abstract

This paper is concerned with network-based control for an offshore steel jacket platform with an active tuned mass damper mechanism. A network-based dynamic model of the offshore platform is presented first. Then, a network-based state feedback control scheme is developed. Based on a proposed Lyapunov-Krasovskii functional, a delay-dependent stability criterion for the offshore platform system is derived, and a sufficient condition for the existence of the network-based controller is developed. It is found through simulation results that the oscillation amplitudes of the offshore steel jacket platform under the network-based feedback controller are smaller than the ones under the nonlinear controller, and the control force required by the former is much smaller than the one by the latter.