Adaptive positioning control of guyed offshore towers through active mass dampers

Abstract EN

An adaptive mass damper is proposed to stabilize the motion of a guyed structure immersed in a flow field.

The equations describing the 3D motion of the structure equipped with a tuned mass damper are derived by classical Hamiltonian principles.

A 4-DOF discrete reduced-order model is assumed to describe the system.

Morison’s equations are used to represent the interaction between the flow field and the structure, complemented by terms including the vortex dynamics effect.

The control strategy is realized through a tuned mass damper attached to the structure and driven by an adaptive control algorithm.

During the control activity, uncertainty in the various hydrodynamic coefficients is allowed.

The proposed procedures have two distinct beneficial results.

The first one being to control the vibration of the structure, and the second one is the estimation of the hydrodynamic coefficients and the validation/ calibration of Morison’s equation model for the flow-induced forces.