Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1725518 | Ocean Engineering | 2015 | 14 Pages |
•A model of a marine riser in state space representation is presented.•A model of a marine riser in Liénard representation is determined.•Kalman-like observers are designed to identify the structural parameters of a riser.
The goal of this paper is to present a nonlinear approach to identify the structural parameters of a vertical riser. To carry out this task, Kalman-like observers are proposed so that they can deal with the nonlinear behavior that is exhibited in the restoring force of a riser and the noise of the measurement signals that are used to perform the identification. The observers are designed from a spatial discretization of a nonlinear model with distributed parameters that is described by a system of quasi-linear partial differential equations. Some results from numerical simulations—showing the feasibility of the proposed approach—are presented.