Modeling and Identification of the Restoring Force of a Marine Riser

Lizeth Torres (1) , Cristina Verde (1) , Gildas Besancon (2, 3) , J.D. Aviles (1)

1 Instituto de Ingeniería [Mexico]
2 GIPSA-SYSCO - GIPSA - Systèmes non linéaires et complexité
3 IUF - Institut universitaire de France

The purpose of this paper is to provide a novel model to characterize the nonlinear restoring force of a marine vertical riser by using position-and-velocity-dependent polynomials. This model permits the obtaining of a specific state space representation--via the Li'enard transformation--for the design of state observers that identify the structural parameters of vertical risers. The main results presented here are: (i) an approximation of the nonlinear restoring force by means of polynomials and its incorporation into a distributed parameter (DP) model, (ii) the transformation of the DP model into a Li'enard system and (iii) an analysis of its observability and identifiability properties.

Mots clés: pipelines; structural parameters; parameter identification; Marine systems; state observers

Domaines: Automatique / Robotique

Lizeth Torres, Cristina Verde, Gildas Besancon, J.D. Aviles. Modeling and Identification of the Restoring Force of a Marine Riser. IFAC WC 2014 - 19th IFAC World Congress, Aug 2014, Le Cap, South Africa. pp.n/c. ⟨hal-00982128⟩